/**
* ABI lowering.
*
- *
- *
+ * @author Sebastian Hack
+ * @date 7.3.2005
+ * @cvsid $Id$
*/
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
-#include "firm_config.h"
#include "obst.h"
+#include "offset.h"
#include "type.h"
+#include "irgopt.h"
#include "irgraph_t.h"
#include "irnode_t.h"
#include "iredges_t.h"
#include "irgmod.h"
#include "irgwalk.h"
+#include "irprintf_t.h"
+#include "irgopt.h"
+#include "irbitset.h"
+#include "height.h"
+#include "pdeq.h"
+#include "irtools.h"
+#include "raw_bitset.h"
#include "be.h"
#include "beabi.h"
-#include "bearch.h"
+#include "bearch_t.h"
#include "benode_t.h"
+#include "belive_t.h"
#include "besched_t.h"
-
-#define MAX(x, y) ((x) > (y) ? (x) : (y))
-#define MIN(x, y) ((x) < (y) ? (x) : (y))
+#include "beirg_t.h"
+#include "bessaconstr.h"
typedef struct _be_abi_call_arg_t {
- unsigned is_res : 1;
- unsigned in_reg : 1;
+ unsigned is_res : 1; /**< 1: the call argument is a return value. 0: it's a call parameter. */
+ unsigned in_reg : 1; /**< 1: this argument is transmitted in registers. */
+ unsigned on_stack : 1; /**< 1: this argument is transmitted on the stack. */
int pos;
const arch_register_t *reg;
+ ir_entity *stack_ent;
+ unsigned alignment;
+ unsigned space_before;
+ unsigned space_after;
} be_abi_call_arg_t;
struct _be_abi_call_t {
- be_abi_call_flags_t flags;
- unsigned arg_gap;
- set *params;
+ be_abi_call_flags_t flags;
+ const be_abi_callbacks_t *cb;
+ ir_type *between_type;
+ set *params;
+ const arch_register_class_t *cls_addr;
};
struct _be_abi_irg_t {
- struct obstack obst;
- be_irg_t *birg;
- be_abi_call_t *call;
- type *method_type;
+ struct obstack obst;
+ be_stack_layout_t *frame; /**< The stack frame model. */
+ be_irg_t *birg; /**< The back end IRG. */
+ const arch_isa_t *isa; /**< The isa. */
+ survive_dce_t *dce_survivor;
- ir_node *init_sp; /**< The node representing the stack pointer
+ be_abi_call_t *call; /**< The ABI call information. */
+ ir_type *method_type; /**< The type of the method of the IRG. */
+
+ ir_node *init_sp; /**< The node representing the stack pointer
at the start of the function. */
- ir_node *reg_params;
+ ir_node *start_barrier; /**< The barrier of the start block */
+
+ ir_node *reg_params; /**< The reg params node. */
+ pmap *regs; /**< A map of all callee-save and ignore regs to
+ their Projs to the RegParams node. */
+
+ int start_block_bias; /**< The stack bias at the end of the start block. */
+
+ void *cb; /**< ABI Callback self pointer. */
- pset *stack_ops; /**< Contains all nodes modifying the stack pointer. */
- pmap *regs;
+ pmap *keep_map; /**< mapping blocks to keep nodes. */
+ pset *ignore_regs; /**< Additional registers which shall be ignored. */
- int start_block_bias;
+ ir_node **calls; /**< flexible array containing all be_Call nodes */
- unsigned omit_fp : 1;
- unsigned dedicated_fp : 1;
- unsigned left_to_right : 1;
+ arch_register_req_t sp_req;
+ arch_register_req_t sp_cls_req;
- firm_dbg_module_t *dbg; /**< The debugging module. */
+ DEBUG_ONLY(firm_dbg_module_t *dbg;) /**< The debugging module. */
};
+static heights_t *ir_heights;
+
+/* Flag: if set, try to omit the frame pointer if called by the backend */
+static int be_omit_fp = 1;
+
+/*
+ _ ____ ___ ____ _ _ _ _
+ / \ | __ )_ _| / ___|__ _| | | |__ __ _ ___| | _____
+ / _ \ | _ \| | | | / _` | | | '_ \ / _` |/ __| |/ / __|
+ / ___ \| |_) | | | |__| (_| | | | |_) | (_| | (__| <\__ \
+ /_/ \_\____/___| \____\__,_|_|_|_.__/ \__,_|\___|_|\_\___/
+
+ These callbacks are used by the backend to set the parameters
+ for a specific call type.
+*/
+
+/**
+ * Set compare function: compares two ABI call object arguments.
+ */
static int cmp_call_arg(const void *a, const void *b, size_t n)
{
const be_abi_call_arg_t *p = a, *q = b;
return !(p->is_res == q->is_res && p->pos == q->pos);
}
+/**
+ * Get or set an ABI call object argument.
+ *
+ * @param call the abi call
+ * @param is_res true for call results, false for call arguments
+ * @param pos position of the argument
+ * @param do_insert true if the argument is set, false if it's retrieved
+ */
static be_abi_call_arg_t *get_or_set_call_arg(be_abi_call_t *call, int is_res, int pos, int do_insert)
{
be_abi_call_arg_t arg;
unsigned hash;
+ memset(&arg, 0, sizeof(arg));
arg.is_res = is_res;
arg.pos = pos;
- hash = is_res * 100 + pos;
+ hash = is_res * 128 + pos;
return do_insert
? set_insert(call->params, &arg, sizeof(arg), hash)
: set_find(call->params, &arg, sizeof(arg), hash);
}
+/**
+ * Retrieve an ABI call object argument.
+ *
+ * @param call the ABI call object
+ * @param is_res true for call results, false for call arguments
+ * @param pos position of the argument
+ */
static INLINE be_abi_call_arg_t *get_call_arg(be_abi_call_t *call, int is_res, int pos)
{
return get_or_set_call_arg(call, is_res, pos, 0);
}
-void be_abi_call_set_flags(be_abi_call_t *call, be_abi_call_flags_t flags, unsigned arg_gap)
+/* Set the flags for a call. */
+void be_abi_call_set_flags(be_abi_call_t *call, be_abi_call_flags_t flags, const be_abi_callbacks_t *cb)
+{
+ call->flags = flags;
+ call->cb = cb;
+}
+
+
+/* Set register class for call address */
+void be_abi_call_set_call_address_reg_class(be_abi_call_t *call, const arch_register_class_t *cls)
{
- call->flags = flags;
- call->arg_gap = arg_gap;
+ call->cls_addr = cls;
}
-void be_abi_call_param_stack(be_abi_call_t *call, int arg_pos)
+
+void be_abi_call_param_stack(be_abi_call_t *call, int arg_pos, unsigned alignment, unsigned space_before, unsigned space_after)
{
be_abi_call_arg_t *arg = get_or_set_call_arg(call, 0, arg_pos, 1);
+ arg->on_stack = 1;
+ arg->alignment = alignment;
+ arg->space_before = space_before;
+ arg->space_after = space_after;
+ assert(alignment > 0 && "Alignment must be greater than 0");
}
void be_abi_call_param_reg(be_abi_call_t *call, int arg_pos, const arch_register_t *reg)
{
be_abi_call_arg_t *arg = get_or_set_call_arg(call, 0, arg_pos, 1);
+ arg->in_reg = 1;
arg->reg = reg;
}
void be_abi_call_res_reg(be_abi_call_t *call, int arg_pos, const arch_register_t *reg)
{
be_abi_call_arg_t *arg = get_or_set_call_arg(call, 1, arg_pos, 1);
+ arg->in_reg = 1;
arg->reg = reg;
}
-be_abi_call_t *be_abi_call_new(void)
+/* Get the flags of a ABI call object. */
+be_abi_call_flags_t be_abi_call_get_flags(const be_abi_call_t *call)
+{
+ return call->flags;
+}
+
+/**
+ * Constructor for a new ABI call object.
+ *
+ * @return the new ABI call object
+ */
+static be_abi_call_t *be_abi_call_new(const arch_register_class_t *cls_addr)
{
- be_abi_call_t *call = malloc(sizeof(call[0]));
- call->flags = BE_ABI_NONE;
- call->params = new_set(cmp_call_arg, 16);
+ be_abi_call_t *call = xmalloc(sizeof(call[0]));
+
+ call->flags.val = 0;
+ call->params = new_set(cmp_call_arg, 16);
+ call->cb = NULL;
+ call->cls_addr = cls_addr;
+
+ call->flags.bits.try_omit_fp = be_omit_fp;
+
return call;
}
-void be_abi_call_free(be_abi_call_t *call)
+/**
+ * Destructor for an ABI call object.
+ */
+static void be_abi_call_free(be_abi_call_t *call)
{
del_set(call->params);
free(call);
}
+/*
+ _____ _ _ _ _ _
+ | ___| __ __ _ _ __ ___ ___ | | | | __ _ _ __ __| | (_)_ __ __ _
+ | |_ | '__/ _` | '_ ` _ \ / _ \ | |_| |/ _` | '_ \ / _` | | | '_ \ / _` |
+ | _|| | | (_| | | | | | | __/ | _ | (_| | | | | (_| | | | | | | (_| |
+ |_| |_| \__,_|_| |_| |_|\___| |_| |_|\__,_|_| |_|\__,_|_|_|_| |_|\__, |
+ |___/
+
+ Handling of the stack frame. It is composed of three types:
+ 1) The type of the arguments which are pushed on the stack.
+ 2) The "between type" which consists of stuff the call of the
+ function pushes on the stack (like the return address and
+ the old base pointer for ia32).
+ 3) The Firm frame type which consists of all local variables
+ and the spills.
+*/
+
+static int get_stack_entity_offset(be_stack_layout_t *frame, ir_entity *ent, int bias)
+{
+ ir_type *t = get_entity_owner(ent);
+ int ofs = get_entity_offset(ent);
+
+ int i, index;
+
+ /* Find the type the entity is contained in. */
+ for(index = 0; index < N_FRAME_TYPES; ++index) {
+ if(frame->order[index] == t)
+ break;
+ }
+
+ /* Add the size of all the types below the one of the entity to the entity's offset */
+ for(i = 0; i < index; ++i)
+ ofs += get_type_size_bytes(frame->order[i]);
+
+ /* correct the offset by the initial position of the frame pointer */
+ ofs -= frame->initial_offset;
+
+ /* correct the offset with the current bias. */
+ ofs += bias;
+
+ return ofs;
+}
+
+/**
+ * Retrieve the entity with given offset from a frame type.
+ */
+static ir_entity *search_ent_with_offset(ir_type *t, int offset)
+{
+ int i, n;
+
+ for(i = 0, n = get_compound_n_members(t); i < n; ++i) {
+ ir_entity *ent = get_compound_member(t, i);
+ if(get_entity_offset(ent) == offset)
+ return ent;
+ }
+
+ return NULL;
+}
+
+static int stack_frame_compute_initial_offset(be_stack_layout_t *frame)
+{
+ ir_type *base = frame->stack_dir < 0 ? frame->between_type : frame->frame_type;
+ ir_entity *ent = search_ent_with_offset(base, 0);
+
+ frame->initial_offset = ent ? get_stack_entity_offset(frame, ent, 0) : 0;
+
+ return frame->initial_offset;
+}
+
+/**
+ * Initializes the frame layout from parts
+ *
+ * @param frame the stack layout that will be initialized
+ * @param args the stack argument layout type
+ * @param between the between layout type
+ * @param locals the method frame type
+ * @param stack_dir the stack direction
+ * @param param_map an array mapping method argument positions to the stack argument type
+ *
+ * @return the initialized stack layout
+ */
+static be_stack_layout_t *stack_frame_init(be_stack_layout_t *frame, ir_type *args,
+ ir_type *between, ir_type *locals, int stack_dir,
+ ir_entity *param_map[])
+{
+ frame->arg_type = args;
+ frame->between_type = between;
+ frame->frame_type = locals;
+ frame->initial_offset = 0;
+ frame->stack_dir = stack_dir;
+ frame->order[1] = between;
+ frame->param_map = param_map;
+
+ if(stack_dir > 0) {
+ frame->order[0] = args;
+ frame->order[2] = locals;
+ }
+ else {
+ frame->order[0] = locals;
+ frame->order[2] = args;
+ }
+ return frame;
+}
+
+#if 0
+/** Dumps the stack layout to file. */
+static void stack_layout_dump(FILE *file, be_stack_layout_t *frame)
+{
+ int i, j, n;
+
+ ir_fprintf(file, "initial offset: %d\n", frame->initial_offset);
+ for (j = 0; j < N_FRAME_TYPES; ++j) {
+ ir_type *t = frame->order[j];
+
+ ir_fprintf(file, "type %d: %F size: %d\n", j, t, get_type_size_bytes(t));
+ for (i = 0, n = get_compound_n_members(t); i < n; ++i) {
+ ir_entity *ent = get_compound_member(t, i);
+ ir_fprintf(file, "\t%F int ofs: %d glob ofs: %d\n", ent, get_entity_offset_bytes(ent), get_stack_entity_offset(frame, ent, 0));
+ }
+ }
+}
+#endif
+
+/**
+ * Returns non-zero if the call argument at given position
+ * is transfered on the stack.
+ */
static INLINE int is_on_stack(be_abi_call_t *call, int pos)
{
be_abi_call_arg_t *arg = get_call_arg(call, 0, pos);
return arg && !arg->in_reg;
}
-static void adjust_call(be_abi_irg_t *env, ir_node *irn)
+/*
+ ____ _ _
+ / ___|__ _| | |___
+ | | / _` | | / __|
+ | |__| (_| | | \__ \
+ \____\__,_|_|_|___/
+
+ Adjustment of the calls inside a graph.
+
+*/
+
+/**
+ * Transform a call node.
+ * @param env The ABI environment for the current irg.
+ * @param irn The call node.
+ * @param curr_sp The stack pointer node to use.
+ * @return The stack pointer after the call.
+ */
+static ir_node *adjust_call(be_abi_irg_t *env, ir_node *irn, ir_node *curr_sp, ir_node *alloca_copy)
{
ir_graph *irg = env->birg->irg;
- const arch_isa_t *isa = env->birg->main_env->arch_env->isa;
- be_abi_call_t *call = be_abi_call_new();
+ const arch_env_t *arch_env = env->birg->main_env->arch_env;
+ const arch_isa_t *isa = arch_env->isa;
ir_type *mt = get_Call_type(irn);
+ ir_node *call_ptr = get_Call_ptr(irn);
int n_params = get_method_n_params(mt);
- ir_node *curr_sp = get_irg_frame(irg);
ir_node *curr_mem = get_Call_mem(irn);
ir_node *bl = get_nodes_block(irn);
pset *results = pset_new_ptr(8);
pset *caller_save = pset_new_ptr(8);
+ pset *states = pset_new_ptr(2);
int stack_size = 0;
int stack_dir = arch_isa_stack_dir(isa);
const arch_register_t *sp = arch_isa_sp(isa);
+ be_abi_call_t *call = be_abi_call_new(sp->reg_class);
ir_mode *mach_mode = sp->reg_class->mode;
struct obstack *obst = &env->obst;
- ir_node *no_mem = get_irg_no_mem(irg);
+ int no_alloc = call->flags.bits.frame_is_setup_on_call;
ir_node *res_proj = NULL;
- int curr_res_proj = -1;
+ int curr_res_proj = pn_Call_max;
int n_low_args = 0;
int n_pos = 0;
+ int count;
ir_node *low_call;
ir_node **in;
- ir_node *sp_proj;
+ ir_node **res_projs;
+ const arch_register_t *reg;
const ir_edge_t *edge;
int *low_args;
int *pos;
/* Let the isa fill out the abi description for that call node. */
arch_isa_get_call_abi(isa, mt, call);
- assert(get_method_variadicity(mt) == variadicity_non_variadic);
-
/* Insert code to put the stack arguments on the stack. */
- /* TODO: Vargargs */
- for(i = 0, n = get_Call_n_params(irn); i < n; ++i) {
+ assert(get_Call_n_params(irn) == n_params);
+ for(i = 0; i < n_params; ++i) {
be_abi_call_arg_t *arg = get_call_arg(call, 0, i);
- if(arg && !arg->in_reg) {
- stack_size += get_type_size_bytes(get_method_param_type(mt, i));
+ assert(arg);
+ if (arg->on_stack) {
+ int arg_size = get_type_size_bytes(get_method_param_type(mt, i));
+
+ stack_size += round_up2(arg->space_before, arg->alignment);
+ stack_size += round_up2(arg_size, arg->alignment);
+ stack_size += round_up2(arg->space_after, arg->alignment);
obstack_int_grow(obst, i);
n_pos++;
}
}
low_args = obstack_finish(obst);
- /* If there are some parameters shich shall be passed on the stack. */
+ /* If there are some parameters which shall be passed on the stack. */
if(n_pos > 0) {
int curr_ofs = 0;
- int do_seq = (call->flags & BE_ABI_USE_PUSH);
+ int do_seq = call->flags.bits.store_args_sequential && !no_alloc;
- /* Reverse list of stack parameters if call arguments are from left to right */
- if(call->flags & BE_ABI_LEFT_TO_RIGHT) {
- for(i = 0; i < n_pos / 2; ++i) {
+ /*
+ * Reverse list of stack parameters if call arguments are from left to right.
+ * We must them reverse again if they are pushed (not stored) and the stack
+ * direction is downwards.
+ */
+ if (call->flags.bits.left_to_right ^ (do_seq && stack_dir < 0)) {
+ for (i = 0; i < n_pos >> 1; ++i) {
int other = n_pos - i - 1;
int tmp = pos[i];
pos[i] = pos[other];
/*
* If the stack is decreasing and we do not want to store sequentially,
+ * or someone else allocated the call frame
* we allocate as much space on the stack all parameters need, by
* moving the stack pointer along the stack's direction.
*/
- if(stack_dir < 0 && !do_seq) {
- curr_sp = be_new_IncSP(sp, irg, bl, curr_sp, no_mem, stack_size, be_stack_dir_along);
- pset_insert_ptr(env->stack_ops, curr_sp);
+ if(stack_dir < 0 && !do_seq && !no_alloc) {
+ curr_sp = be_new_IncSP(sp, irg, bl, curr_sp, stack_size);
+ if(alloca_copy) {
+ add_irn_dep(curr_sp, alloca_copy);
+ alloca_copy = NULL;
+ }
+ }
+
+ if(!do_seq) {
+ obstack_ptr_grow(obst, get_Call_mem(irn));
+ curr_mem = new_NoMem();
+ } else {
+ curr_mem = get_Call_mem(irn);
}
- assert(mode_is_reference(mach_mode) && "machine mode must be pointer");
for(i = 0; i < n_pos; ++i) {
- int p = pos[i];
- ir_node *param = get_Call_param(irn, p);
- ir_node *addr = curr_sp;
- ir_node *mem = NULL;
- type *param_type = get_method_param_type(mt, p);
- int param_size = get_type_size_bytes(param_type);
-
- /* Make the expression to compute the argument's offset. */
- if(curr_ofs > 0) {
- addr = new_r_Const_long(irg, bl, mode_Is, curr_ofs);
- addr = new_r_Add(irg, bl, curr_sp, addr, mach_mode);
+ int p = pos[i];
+ be_abi_call_arg_t *arg = get_call_arg(call, 0, p);
+ ir_node *param = get_Call_param(irn, p);
+ ir_node *addr = curr_sp;
+ ir_node *mem = NULL;
+ ir_type *param_type = get_method_param_type(mt, p);
+ int param_size = get_type_size_bytes(param_type) + arg->space_after;
+
+ /*
+ * If we wanted to build the arguments sequentially,
+ * the stack pointer for the next must be incremented,
+ * and the memory value propagated.
+ */
+ if (do_seq) {
+ curr_ofs = 0;
+ addr = curr_sp = be_new_IncSP(sp, irg, bl, curr_sp, param_size + arg->space_before);
+ if(alloca_copy) {
+ add_irn_dep(curr_sp, alloca_copy);
+ alloca_copy = NULL;
+ }
+ add_irn_dep(curr_sp, curr_mem);
+ }
+ else {
+ curr_ofs += arg->space_before;
+ curr_ofs = round_up2(curr_ofs, arg->alignment);
+
+ /* Make the expression to compute the argument's offset. */
+ if(curr_ofs > 0) {
+ ir_mode *constmode = mach_mode;
+ if(mode_is_reference(mach_mode)) {
+ constmode = mode_Is;
+ }
+ addr = new_r_Const_long(irg, bl, constmode, curr_ofs);
+ addr = new_r_Add(irg, bl, curr_sp, addr, mach_mode);
+ }
}
/* Insert a store for primitive arguments. */
- if(is_atomic_type(param_type)) {
- mem = new_r_Store(irg, bl, curr_mem, addr, param);
- mem = new_r_Proj(irg, bl, mem, mode_M, pn_Store_M);
+ if (is_atomic_type(param_type)) {
+ ir_node *store;
+ store = new_r_Store(irg, bl, curr_mem, addr, param);
+ mem = new_r_Proj(irg, bl, store, mode_M, pn_Store_M);
}
- /* Make a memcopy for compound arguments. */
+ /* Make a mem copy for compound arguments. */
else {
+ ir_node *copy;
+
assert(mode_is_reference(get_irn_mode(param)));
- mem = new_r_CopyB(irg, bl, curr_mem, addr, param, param_type);
- mem = new_r_Proj(irg, bl, mem, mode_M, pn_CopyB_M_regular);
+ copy = new_r_CopyB(irg, bl, curr_mem, addr, param, param_type);
+ mem = new_r_Proj(irg, bl, copy, mode_M, pn_CopyB_M_regular);
}
- obstack_ptr_grow(obst, mem);
-
curr_ofs += param_size;
- /*
- * If we wanted to build the arguments sequentially,
- * the stack pointer for the next must be incremented,
- * and the memory value propagated.
- */
- if(do_seq) {
- curr_ofs = 0;
- curr_sp = be_new_IncSP(sp, irg, bl, curr_sp, no_mem, param_size, be_stack_dir_along);
+ if (do_seq)
curr_mem = mem;
-
- /*
- * only put the first IncSP to the stack fixup set since the other
- * ones are correctly connected to other nodes and do not need
- * to be fixed.
- */
- if(i == 0)
- pset_insert_ptr(env->stack_ops, curr_sp);
- }
+ else
+ obstack_ptr_grow(obst, mem);
}
in = (ir_node **) obstack_finish(obst);
/* We need the sync only, if we didn't build the stores sequentially. */
- if(!do_seq)
- curr_mem = new_r_Sync(irg, bl, n_pos, in);
+ if(!do_seq) {
+ if(n_pos >= 1) {
+ curr_mem = new_r_Sync(irg, bl, n_pos + 1, in);
+ } else {
+ curr_mem = get_Call_mem(irn);
+ }
+ }
obstack_free(obst, in);
}
const arch_register_class_t *cls = arch_isa_get_reg_class(isa, i);
for(j = 0; j < cls->n_regs; ++j) {
const arch_register_t *reg = arch_register_for_index(cls, j);
- if(arch_register_type_is(reg, caller_save))
+ if(arch_register_type_is(reg, caller_save)) {
pset_insert_ptr(caller_save, (void *) reg);
+ }
+ if(arch_register_type_is(reg, state)) {
+ pset_insert_ptr(caller_save, (void*) reg);
+ pset_insert_ptr(states, (void*) reg);
+ }
}
}
/* search the greatest result proj number */
+
+ /* TODO: what if the result is NOT used? Currently there is
+ * no way to detect this later, especially there is no way to
+ * see this in the proj numbers.
+ * While this is ok for the register allocator, it is bad for
+ * backends which need to change the be_Call further (x87 simulator
+ * for instance. However for this particular case the call_type is
+ * sufficient.).
+ */
foreach_out_edge(irn, edge) {
const ir_edge_t *res_edge;
ir_node *irn = get_edge_src_irn(edge);
- if(is_Proj(irn) && get_irn_mode(irn) == mode_T) {
+ if(is_Proj(irn) && get_Proj_proj(irn) == pn_Call_T_result) {
res_proj = irn;
foreach_out_edge(irn, res_edge) {
int proj;
ir_node *res = get_edge_src_irn(res_edge);
assert(is_Proj(res));
+
proj = get_Proj_proj(res);
arg = get_call_arg(call, 1, proj);
+
+ /*
+ shift the proj number to the right, since we will drop the
+ unspeakable Proj_T from the Call. Therefore, all real argument
+ Proj numbers must be increased by pn_be_Call_first_res
+ */
+ proj += pn_be_Call_first_res;
+ set_Proj_proj(res, proj);
+ obstack_ptr_grow(obst, res);
+
if(proj > curr_res_proj)
curr_res_proj = proj;
- if(arg->in_reg)
+ if(arg->in_reg) {
pset_remove_ptr(caller_save, arg->reg);
+ //pmap_insert(arg_regs, arg->reg, INT_TO_PTR(proj + 1))
+ }
}
}
}
+
curr_res_proj++;
+ obstack_ptr_grow(obst, NULL);
+ res_projs = obstack_finish(obst);
+
+ /* make the back end call node and set its register requirements. */
+ for(i = 0; i < n_low_args; ++i) {
+ obstack_ptr_grow(obst, get_Call_param(irn, low_args[i]));
+ }
+ foreach_pset(states, reg) {
+ const arch_register_class_t *cls = arch_register_get_class(reg);
+#if 0
+ ir_node *regnode = be_abi_reg_map_get(env->regs, reg);
+ ir_fprintf(stderr, "Adding %+F\n", regnode);
+#endif
+ ir_node *regnode = new_rd_Unknown(irg, arch_register_class_mode(cls));
+ obstack_ptr_grow(obst, regnode);
+ }
+ count = n_low_args + pset_count(states);
+
+ in = obstack_finish(obst);
+
+ if(env->call->flags.bits.call_has_imm && get_irn_opcode(call_ptr) == iro_SymConst) {
+ low_call = be_new_Call(get_irn_dbg_info(irn), irg, bl, curr_mem,
+ curr_sp, curr_sp,
+ curr_res_proj + pset_count(caller_save), count,
+ in, get_Call_type(irn));
+ be_Call_set_entity(low_call, get_SymConst_entity(call_ptr));
+ } else {
+ low_call = be_new_Call(get_irn_dbg_info(irn), irg, bl, curr_mem,
+ curr_sp, call_ptr,
+ curr_res_proj + pset_count(caller_save),
+ count, in, get_Call_type(irn));
+ }
+ ARR_APP1(ir_node*, env->calls, low_call);
+
+ /*
+ Set the register class of the call address to
+ the backend provided class (default: stack pointer class)
+ */
+ be_node_set_reg_class(low_call, be_pos_Call_ptr, call->cls_addr);
+
+ DBG((env->dbg, LEVEL_3, "\tcreated backend call %+F\n", low_call));
+
+ /* Set the register classes and constraints of the Call parameters. */
+ for(i = 0; i < n_low_args; ++i) {
+ int index = low_args[i];
+ be_abi_call_arg_t *arg = get_call_arg(call, 0, index);
+ assert(arg->reg != NULL);
+
+ be_set_constr_single_reg(low_call, be_pos_Call_first_arg + index, arg->reg);
+ }
+
+ /* Set the register constraints of the results. */
+ for (i = 0; res_projs[i]; ++i) {
+ int pn = get_Proj_proj(res_projs[i]);
+
+ /* Correct Proj number since it has been adjusted! (see above) */
+ const be_abi_call_arg_t *arg = get_call_arg(call, 1, pn - pn_Call_max);
+
+ /* Matze: we need the information about the real mode for later
+ * transforms (signed/unsigend compares, stores...), so leave the fixup
+ * for the backend transform phase... */
+#if 0
+ /* correct mode */
+ const arch_register_class_t *cls = arch_register_get_class(arg->reg);
+ ir_mode *mode = arch_register_class_mode(cls);
+ set_irn_mode(irn, mode);
+#endif
+
+ assert(arg->in_reg);
+ be_set_constr_single_reg(low_call, BE_OUT_POS(pn), arg->reg);
+ arch_set_irn_register(arch_env, res_projs[i], arg->reg);
+ }
+ obstack_free(obst, in);
+ exchange(irn, low_call);
+
+ /* redirect the result projs to the lowered call instead of the Proj_T */
+ for (i = 0; res_projs[i]; ++i)
+ set_Proj_pred(res_projs[i], low_call);
+
+ /* set the now unnecessary projT to bad */
+ if(res_proj != NULL) {
+ be_kill_node(res_proj);
+ }
/* Make additional projs for the caller save registers
and the Keep node which keeps them alive. */
- if(pset_count(caller_save) > 0) {
+ if (pset_count(caller_save) > 0) {
const arch_register_t *reg;
- ir_node **in;
+ ir_node **in, *keep;
+ int i, n;
- if(!res_proj)
- res_proj = new_r_Proj(irg, bl, irn, mode_T, pn_Call_T_result);
+ for (reg = pset_first(caller_save), n = 0; reg; reg = pset_next(caller_save), ++n) {
+ ir_node *proj = new_r_Proj(irg, bl, low_call, reg->reg_class->mode, curr_res_proj);
- for(reg = pset_first(caller_save); reg; reg = pset_next(caller_save))
- obstack_ptr_grow(obst, new_r_Proj(irg, bl, res_proj, reg->reg_class->mode, curr_res_proj++));
+ /* memorize the register in the link field. we need afterwards to set the register class of the keep correctly. */
+ be_set_constr_single_reg(low_call, BE_OUT_POS(curr_res_proj), reg);
- in = (ir_node **) obstack_finish(obst);
- be_new_Keep(NULL, irg, bl, pset_count(caller_save), in);
+ /* a call can produce ignore registers, in this case set the flag and register for the Proj */
+ if (arch_register_type_is(reg, ignore)) {
+ arch_set_irn_register(env->birg->main_env->arch_env, proj, reg);
+ be_node_set_flags(low_call, BE_OUT_POS(curr_res_proj), arch_irn_flags_ignore);
+ }
+
+ set_irn_link(proj, (void *) reg);
+ obstack_ptr_grow(obst, proj);
+ curr_res_proj++;
+ }
+
+ /* create the Keep for the caller save registers */
+ in = (ir_node **) obstack_finish(obst);
+ keep = be_new_Keep(NULL, irg, bl, n, in);
+ for (i = 0; i < n; ++i) {
+ const arch_register_t *reg = get_irn_link(in[i]);
+ be_node_set_reg_class(keep, i, reg->reg_class);
+ }
obstack_free(obst, in);
}
/* Clean up the stack. */
if(stack_size > 0) {
- ir_node *last_inc_sp;
-
- /* Get the result ProjT */
- if(!res_proj)
- res_proj = new_r_Proj(irg, bl, irn, mode_T, pn_Call_T_result);
-
- /* Make a Proj for the stack pointer. */
- sp_proj = new_r_Proj(irg, bl, res_proj, sp->reg_class->mode, curr_res_proj++);
- last_inc_sp = be_new_IncSP(sp, irg, bl, sp_proj, no_mem, stack_size, be_stack_dir_against);
- pset_insert_ptr(env->stack_ops, last_inc_sp);
- }
+ ir_node *mem_proj = NULL;
- /* at last make the backend call node and set its register requirements. */
- for(i = 0; i < n_low_args; ++i)
- obstack_ptr_grow(obst, get_Call_param(irn, low_args[i]));
+ foreach_out_edge(low_call, edge) {
+ ir_node *irn = get_edge_src_irn(edge);
+ if(is_Proj(irn) && get_Proj_proj(irn) == pn_Call_M) {
+ mem_proj = irn;
+ break;
+ }
+ }
- in = obstack_finish(obst);
- low_call = be_new_Call(irg, bl, curr_mem, curr_sp, get_Call_ptr(irn), curr_res_proj, n_low_args, in);
- obstack_free(obst, in);
+ if(!mem_proj) {
+ mem_proj = new_r_Proj(irg, bl, low_call, mode_M, pn_Call_M);
+ keep_alive(mem_proj);
+ }
- exchange(irn, low_call);
+ /* Clean up the stack frame if we allocated it */
+ if(!no_alloc) {
+ curr_sp = be_new_IncSP(sp, irg, bl, curr_sp, -stack_size);
+ add_irn_dep(curr_sp, mem_proj);
+ if(alloca_copy) {
+ add_irn_dep(curr_sp, alloca_copy);
+ alloca_copy = NULL;
+ }
+ }
+ }
be_abi_call_free(call);
obstack_free(obst, pos);
del_pset(results);
+ del_pset(states);
del_pset(caller_save);
-}
-static void adjust_call_walker(ir_node *irn, void *data)
-{
- if(get_irn_opcode(irn) == iro_Call)
- adjust_call(data, irn);
+ return curr_sp;
}
/**
- * Walker to implement alloca-style allocations.
- * They are implemented using an add to the stack pointer
- * and a copy instruction.
+ * Adjust an alloca.
+ * The alloca is transformed into a back end alloca node and connected to the stack nodes.
*/
-static void implement_stack_alloc(be_abi_irg_t *env, ir_node *irn)
+static ir_node *adjust_alloc(be_abi_irg_t *env, ir_node *alloc, ir_node *curr_sp, ir_node **result_copy)
{
- const arch_isa_t *isa = env->birg->main_env->arch_env->isa;
- ir_node *bl = get_nodes_block(irn);
- ir_node *res = env->init_sp;
+ ir_node *block;
+ ir_graph *irg;
+ ir_node *alloc_mem;
+ ir_node *alloc_res;
+ ir_type *type;
+
+ const ir_edge_t *edge;
+ ir_node *new_alloc;
ir_node *size;
+ ir_node *addr;
+ ir_node *copy;
+ ir_node *ins[2];
- assert(get_irn_opcode(irn) == iro_Alloc && get_Alloc_where(irn) == stack_alloc);
+ if (get_Alloc_where(alloc) != stack_alloc) {
+ assert(0);
+ return alloc;
+ }
- size = get_Alloc_size(irn);
- if(isa->stack_dir > 0)
- res = be_new_Copy(isa->sp->reg_class, env->birg->irg, bl, res);
+ block = get_nodes_block(alloc);
+ irg = get_irn_irg(block);
+ alloc_mem = NULL;
+ alloc_res = NULL;
+ type = get_Alloc_type(alloc);
- res = be_new_AddSP(isa->sp, env->birg->irg, bl, res, size);
- pset_insert_ptr(env->stack_ops, res);
+ foreach_out_edge(alloc, edge) {
+ ir_node *irn = get_edge_src_irn(edge);
- if(isa->stack_dir < 0)
- res = be_new_Copy(isa->sp->reg_class, env->birg->irg, bl, res);
+ assert(is_Proj(irn));
+ switch(get_Proj_proj(irn)) {
+ case pn_Alloc_M:
+ alloc_mem = irn;
+ break;
+ case pn_Alloc_res:
+ alloc_res = irn;
+ break;
+ default:
+ break;
+ }
+ }
-}
+ /* Beware: currently Alloc nodes without a result might happen,
+ only escape analysis kills them and this phase runs only for object
+ oriented source. We kill the Alloc here. */
+ if (alloc_res == NULL && alloc_mem) {
+ exchange(alloc_mem, get_Alloc_mem(alloc));
+ return curr_sp;
+ }
-static void collect_return_walker(ir_node *irn, void *data)
-{
- if(get_irn_opcode(irn) == iro_Return) {
- struct obstack *obst = data;
- obstack_ptr_grow(obst, irn);
+ /* we might need to multiply the size with the element size */
+ if(type != get_unknown_type() && get_type_size_bytes(type) != 1) {
+ tarval *tv = new_tarval_from_long(get_type_size_bytes(type), mode_Iu);
+ ir_node *cnst = new_rd_Const(NULL, irg, block, mode_Iu, tv);
+ ir_node *mul = new_rd_Mul(NULL, irg, block, get_Alloc_size(alloc),
+ cnst, mode_Iu);
+ size = mul;
+ } else {
+ size = get_Alloc_size(alloc);
}
-}
-static ir_node *setup_frame(be_abi_irg_t *env)
-{
- const arch_isa_t *isa = env->birg->main_env->arch_env->isa;
- const arch_register_t *sp = isa->sp;
- const arch_register_t *bp = isa->bp;
- ir_graph *irg = env->birg->irg;
- ir_node *bl = get_irg_start_block(irg);
- ir_node *no_mem = get_irg_no_mem(irg);
- ir_node *old_frame = get_irg_frame(irg);
- int store_old_fp = 1;
- int omit_fp = env->omit_fp;
- ir_node *stack = pmap_get(env->regs, (void *) sp);
- ir_node *frame = pmap_get(env->regs, (void *) bp);
+ /* The stack pointer will be modified in an unknown manner.
+ We cannot omit it. */
+ env->call->flags.bits.try_omit_fp = 0;
+ new_alloc = be_new_AddSP(env->isa->sp, irg, block, curr_sp, size);
- int stack_nr = get_Proj_proj(stack);
+ if(alloc_mem != NULL) {
+ ir_node *addsp_mem;
+ ir_node *sync;
- if(omit_fp) {
- stack = be_new_IncSP(sp, irg, bl, stack, no_mem, BE_STACK_FRAME_SIZE, be_stack_dir_along);
- frame = stack;
+ addsp_mem = new_r_Proj(irg, block, new_alloc, mode_M, pn_be_AddSP_M);
+
+ // We need to sync the output mem of the AddSP with the input mem
+ // edge into the alloc node
+ ins[0] = get_Alloc_mem(alloc);
+ ins[1] = addsp_mem;
+ sync = new_r_Sync(irg, block, 2, ins);
+
+ exchange(alloc_mem, sync);
}
- else {
- if(store_old_fp) {
- ir_node *irn;
+ exchange(alloc, new_alloc);
- irn = new_r_Store(irg, bl, get_irg_initial_mem(irg), stack, frame);
- irn = new_r_Proj(irg, bl, irn, mode_M, pn_Store_M);
- stack = be_new_IncSP(sp, irg, bl, stack, irn, get_mode_size_bytes(bp->reg_class->mode), be_stack_dir_along);
- }
+ /* fix projnum of alloca res */
+ set_Proj_proj(alloc_res, pn_be_AddSP_res);
- frame = be_new_Copy(bp->reg_class, irg, bl, stack);
+ addr = env->isa->stack_dir < 0 ? alloc_res : curr_sp;
- be_node_set_flags(frame, -1, arch_irn_flags_dont_spill);
- if(env->dedicated_fp) {
- be_set_constr_single_reg(frame, -1, bp);
- be_node_set_flags(frame, -1, arch_irn_flags_ignore);
- }
+ /* copy the address away, since it could be used after further stack pointer modifications. */
+ /* Let it point curr_sp just for the moment, I'll reroute it in a second. */
+ *result_copy = copy = be_new_Copy(env->isa->sp->reg_class, irg, block, curr_sp);
- stack = be_new_IncSP(sp, irg, bl, stack, no_mem, BE_STACK_FRAME_SIZE, be_stack_dir_along);
- }
+ /* Let all users of the Alloc() result now point to the copy. */
+ edges_reroute(alloc_res, copy, irg);
- be_node_set_flags(env->reg_params, -(stack_nr + 1), arch_irn_flags_ignore);
- env->init_sp = stack;
- set_irg_frame(irg, frame);
- edges_reroute(old_frame, frame, irg);
+ /* Rewire the copy appropriately. */
+ set_irn_n(copy, be_pos_Copy_op, addr);
- return frame;
-}
+ curr_sp = alloc_res;
+
+ return curr_sp;
+} /* adjust_alloc */
-static void clearup_frame(be_abi_irg_t *env, ir_node *bl, struct obstack *obst)
+/**
+ * Adjust a Free.
+ * The Free is transformed into a back end free node and connected to the stack nodes.
+ */
+static ir_node *adjust_free(be_abi_irg_t *env, ir_node *free, ir_node *curr_sp)
{
- const arch_isa_t *isa = env->birg->main_env->arch_env->isa;
- const arch_register_t *sp = isa->sp;
- const arch_register_t *bp = isa->bp;
- ir_graph *irg = env->birg->irg;
- ir_node *no_mem = get_irg_no_mem(irg);
- ir_node *frame = get_irg_frame(irg);
- ir_node *stack = env->init_sp;
- int store_old_fp = 1;
+ ir_node *block;
+ ir_graph *irg;
+ ir_node *subsp, *mem, *res, *size, *sync;
+ ir_type *type;
+ ir_node *in[2];
+ ir_mode *sp_mode;
+
+ if (get_Free_where(free) != stack_alloc) {
+ assert(0);
+ return free;
+ }
- pmap_entry *ent;
+ block = get_nodes_block(free);
+ irg = get_irn_irg(block);
+ type = get_Free_type(free);
+ sp_mode = env->isa->sp->reg_class->mode;
+
+ /* we might need to multiply the size with the element size */
+ if(type != get_unknown_type() && get_type_size_bytes(type) != 1) {
+ tarval *tv = new_tarval_from_long(get_type_size_bytes(type), mode_Iu);
+ ir_node *cnst = new_rd_Const(NULL, irg, block, mode_Iu, tv);
+ ir_node *mul = new_rd_Mul(NULL, irg, block, get_Free_size(free),
+ cnst, mode_Iu);
+ size = mul;
+ } else {
+ size = get_Free_size(free);
+ }
+ /* The stack pointer will be modified in an unknown manner.
+ We cannot omit it. */
+ env->call->flags.bits.try_omit_fp = 0;
+ subsp = be_new_SubSP(env->isa->sp, irg, block, curr_sp, size);
- if(env->omit_fp) {
- stack = be_new_IncSP(sp, irg, bl, stack, no_mem, BE_STACK_FRAME_SIZE, be_stack_dir_against);
- }
+ mem = new_r_Proj(irg, block, subsp, mode_M, pn_be_SubSP_M);
+ res = new_r_Proj(irg, block, subsp, sp_mode, pn_be_SubSP_res);
- else {
- stack = be_new_Copy(sp->reg_class, irg, bl, frame);
+ /* we need to sync the memory */
+ in[0] = get_Free_mem(free);
+ in[1] = mem;
+ sync = new_r_Sync(irg, block, 2, in);
- if(store_old_fp) {
- ir_mode *mode = sp->reg_class->mode;
- ir_node *irn;
+ /* and make the AddSP dependent on the former memory */
+ add_irn_dep(subsp, get_Free_mem(free));
- stack = be_new_IncSP(sp, irg, bl, stack, no_mem, get_mode_size_bytes(mode), be_stack_dir_against);
- irn = new_r_Load(irg, bl, no_mem, stack, mode);
- irn = new_r_Proj(irg, bl, irn, mode, pn_Load_res);
- frame = be_new_Copy(bp->reg_class, irg, bl, irn);
- }
+ /* kill the free */
+ exchange(free, sync);
+ curr_sp = res;
- if(env->dedicated_fp) {
- be_set_constr_single_reg(frame, -1, bp);
- }
+ return curr_sp;
+} /* adjust_free */
- }
+/* the following function is replaced by the usage of the heights module */
+#if 0
+/**
+ * Walker for dependent_on().
+ * This function searches a node tgt recursively from a given node
+ * but is restricted to the given block.
+ * @return 1 if tgt was reachable from curr, 0 if not.
+ */
+static int check_dependence(ir_node *curr, ir_node *tgt, ir_node *bl)
+{
+ int n, i;
- pmap_foreach(env->regs, ent) {
- const arch_register_t *reg = ent->key;
- ir_node *irn = ent->value;
+ if (get_nodes_block(curr) != bl)
+ return 0;
- if(reg == sp)
- irn = stack;
- else if(reg == bp)
- irn = frame;
+ if (curr == tgt)
+ return 1;
- obstack_ptr_grow(obst, irn);
+ /* Phi functions stop the recursion inside a basic block */
+ if (! is_Phi(curr)) {
+ for(i = 0, n = get_irn_arity(curr); i < n; ++i) {
+ if (check_dependence(get_irn_n(curr, i), tgt, bl))
+ return 1;
+ }
}
+
+ return 0;
}
+#endif /* if 0 */
/**
- * Modify the irg itself and the frame type.
+ * Check if a node is somehow data dependent on another one.
+ * both nodes must be in the same basic block.
+ * @param n1 The first node.
+ * @param n2 The second node.
+ * @return 1, if n1 is data dependent (transitively) on n2, 0 if not.
*/
-static void modify_irg(be_abi_irg_t *env)
+static int dependent_on(ir_node *n1, ir_node *n2)
{
- firm_dbg_module_t *dbg = env->dbg;
- be_abi_call_t *call = be_abi_call_new();
- const arch_isa_t *isa = env->birg->main_env->arch_env->isa;
- const arch_register_t *sp = arch_isa_sp(isa);
- ir_graph *irg = env->birg->irg;
- ir_node *bl = get_irg_start_block(irg);
- ir_node *end = get_irg_end_block(irg);
- ir_node *arg_tuple = get_irg_args(irg);
- ir_node *no_mem = get_irg_no_mem(irg);
- type *method_type = get_entity_type(get_irg_entity(irg));
- int n_params = get_method_n_params(method_type);
+ assert(get_nodes_block(n1) == get_nodes_block(n2));
- int max_arg = 0;
- int reg_params_nr = 0;
- int arg_offset = 0;
+ return heights_reachable_in_block(ir_heights, n1, n2);
+}
- int i, j, n;
+static int cmp_call_dependecy(const void *c1, const void *c2)
+{
+ ir_node *n1 = *(ir_node **) c1;
+ ir_node *n2 = *(ir_node **) c2;
- ir_node *frame_pointer;
- ir_node *reg_params, *reg_params_bl;
- ir_node **args, **args_repl;
- const ir_edge_t *edge;
+ /*
+ Classical qsort() comparison function behavior:
+ 0 if both elements are equal
+ 1 if second is "smaller" that first
+ -1 if first is "smaller" that second
+ */
+ if (dependent_on(n1, n2))
+ return -1;
+
+ if (dependent_on(n2, n1))
+ return 1;
+
+ return 0;
+}
+
+/**
+ * Walker: links all Call/alloc/Free nodes to the Block they are contained.
+ */
+static void link_calls_in_block_walker(ir_node *irn, void *data)
+{
+ ir_opcode code = get_irn_opcode(irn);
+
+ if (code == iro_Call ||
+ (code == iro_Alloc && get_Alloc_where(irn) == stack_alloc) ||
+ (code == iro_Free && get_Free_where(irn) == stack_alloc)) {
+ be_abi_irg_t *env = data;
+ ir_node *bl = get_nodes_block(irn);
+ void *save = get_irn_link(bl);
+
+ if (code == iro_Call)
+ env->call->flags.bits.irg_is_leaf = 0;
+
+ set_irn_link(irn, save);
+ set_irn_link(bl, irn);
+ }
+}
+
+/**
+ * Block-walker:
+ * Process all Call nodes inside a basic block.
+ * Note that the link field of the block must contain a linked list of all
+ * Call nodes inside the Block. We first order this list according to data dependency
+ * and that connect the calls together.
+ */
+static void process_calls_in_block(ir_node *bl, void *data)
+{
+ be_abi_irg_t *env = data;
+ ir_node *curr_sp = env->init_sp;
+ ir_node *irn;
+ int n;
+
+ for(irn = get_irn_link(bl), n = 0; irn; irn = get_irn_link(irn), ++n)
+ obstack_ptr_grow(&env->obst, irn);
+
+ /* If there were call nodes in the block. */
+ if(n > 0) {
+ ir_node *keep;
+ ir_node **nodes;
+ ir_node *copy = NULL;
+ int i;
+
+ nodes = obstack_finish(&env->obst);
+
+ /* order the call nodes according to data dependency */
+ qsort(nodes, n, sizeof(nodes[0]), cmp_call_dependecy);
+
+ for(i = n - 1; i >= 0; --i) {
+ ir_node *irn = nodes[i];
+
+ DBG((env->dbg, LEVEL_3, "\tprocessing call %+F\n", irn));
+ switch(get_irn_opcode(irn)) {
+ case iro_Call:
+ curr_sp = adjust_call(env, irn, curr_sp, copy);
+ break;
+ case iro_Alloc:
+ curr_sp = adjust_alloc(env, irn, curr_sp, ©);
+ break;
+ case iro_Free:
+ curr_sp = adjust_free(env, irn, curr_sp);
+ break;
+ default:
+ break;
+ }
+ }
+
+ obstack_free(&env->obst, nodes);
+
+ /* Keep the last stack state in the block by tying it to Keep node */
+ nodes[0] = curr_sp;
+ keep = be_new_Keep(env->isa->sp->reg_class, get_irn_irg(bl), bl, 1, nodes);
+ pmap_insert(env->keep_map, bl, keep);
+ }
+
+ set_irn_link(bl, curr_sp);
+} /* process_calls_in_block */
+
+/**
+ * Adjust all call nodes in the graph to the ABI conventions.
+ */
+static void process_calls(be_abi_irg_t *env)
+{
+ ir_graph *irg = env->birg->irg;
+
+ env->call->flags.bits.irg_is_leaf = 1;
+ irg_walk_graph(irg, firm_clear_link, link_calls_in_block_walker, env);
+
+ ir_heights = heights_new(env->birg->irg);
+ irg_block_walk_graph(irg, NULL, process_calls_in_block, env);
+ heights_free(ir_heights);
+}
+
+#if 0 /*
+static ir_node *setup_frame(be_abi_irg_t *env)
+{
+ const arch_isa_t *isa = env->birg->main_env->arch_env->isa;
+ const arch_register_t *sp = isa->sp;
+ const arch_register_t *bp = isa->bp;
+ be_abi_call_flags_bits_t flags = env->call->flags.bits;
+ ir_graph *irg = env->birg->irg;
+ ir_node *bl = get_irg_start_block(irg);
+ ir_node *no_mem = get_irg_no_mem(irg);
+ ir_node *old_frame = get_irg_frame(irg);
+ ir_node *stack = pmap_get(env->regs, (void *) sp);
+ ir_node *frame = pmap_get(env->regs, (void *) bp);
+
+ int stack_nr = get_Proj_proj(stack);
+
+ if(flags.try_omit_fp) {
+ stack = be_new_IncSP(sp, irg, bl, stack, no_mem, BE_STACK_FRAME_SIZE_EXPAND);
+ frame = stack;
+ }
+
+ else {
+ frame = be_new_Copy(bp->reg_class, irg, bl, stack);
+
+ be_node_set_flags(frame, -1, arch_irn_flags_dont_spill);
+ if(!flags.fp_free) {
+ be_set_constr_single_reg(frame, -1, bp);
+ be_node_set_flags(frame, -1, arch_irn_flags_ignore);
+ arch_set_irn_register(env->birg->main_env->arch_env, frame, bp);
+ }
+
+ stack = be_new_IncSP(sp, irg, bl, stack, frame, BE_STACK_FRAME_SIZE_EXPAND);
+ }
+
+ be_node_set_flags(env->reg_params, -(stack_nr + 1), arch_irn_flags_ignore);
+ env->init_sp = stack;
+ set_irg_frame(irg, frame);
+ edges_reroute(old_frame, frame, irg);
+
+ return frame;
+}
+
+static void clearup_frame(be_abi_irg_t *env, ir_node *ret, pmap *reg_map, struct obstack *obst)
+{
+ const arch_isa_t *isa = env->birg->main_env->arch_env->isa;
+ const arch_register_t *sp = isa->sp;
+ const arch_register_t *bp = isa->bp;
+ ir_graph *irg = env->birg->irg;
+ ir_node *ret_mem = get_Return_mem(ret);
+ ir_node *frame = get_irg_frame(irg);
+ ir_node *bl = get_nodes_block(ret);
+ ir_node *stack = get_irn_link(bl);
pmap_entry *ent;
- env->regs = pmap_create();
+ if(env->call->flags.bits.try_omit_fp) {
+ stack = be_new_IncSP(sp, irg, bl, stack, ret_mem, -BE_STACK_FRAME_SIZE_SHRINK);
+ }
- DBG((dbg, LEVEL_1, "introducing abi on %+F\n", irg));
+ else {
+ stack = be_new_SetSP(sp, irg, bl, stack, frame, ret_mem);
+ be_set_constr_single_reg(stack, -1, sp);
+ be_node_set_flags(stack, -1, arch_irn_flags_ignore);
+ }
- /* Find the maximum proj number of the argument tuple proj */
- foreach_out_edge(arg_tuple, edge) {
- ir_node *irn = get_edge_src_irn(edge);
- int nr = get_Proj_proj(irn);
- max_arg = MAX(max_arg, nr);
+ pmap_foreach(env->regs, ent) {
+ const arch_register_t *reg = ent->key;
+ ir_node *irn = ent->value;
+
+ if(reg == sp)
+ obstack_ptr_grow(&env->obst, stack);
+ else if(reg == bp)
+ obstack_ptr_grow(&env->obst, frame);
+ else if(arch_register_type_is(reg, callee_save) || arch_register_type_is(reg, ignore))
+ obstack_ptr_grow(obst, irn);
+ }
+}
+*/
+#endif
+
+/**
+ * Computes the stack argument layout type.
+ * Changes a possibly allocated value param type by moving
+ * entities to the stack layout type.
+ *
+ * @param env the ABI environment
+ * @param call the current call ABI
+ * @param method_type the method type
+ * @param param_map an array mapping method arguments to the stack layout type
+ *
+ * @return the stack argument layout type
+ */
+static ir_type *compute_arg_type(be_abi_irg_t *env, be_abi_call_t *call, ir_type *method_type, ir_entity ***param_map)
+{
+ int dir = env->call->flags.bits.left_to_right ? 1 : -1;
+ int inc = env->birg->main_env->arch_env->isa->stack_dir * dir;
+ int n = get_method_n_params(method_type);
+ int curr = inc > 0 ? 0 : n - 1;
+ int ofs = 0;
+
+ char buf[128];
+ ir_type *res;
+ int i;
+ ir_type *val_param_tp = get_method_value_param_type(method_type);
+ ident *id = get_entity_ident(get_irg_entity(env->birg->irg));
+ ir_entity **map;
+
+ *param_map = map = obstack_alloc(&env->obst, n * sizeof(ir_entity *));
+ res = new_type_struct(mangle_u(id, new_id_from_chars("arg_type", 8)));
+ for (i = 0; i < n; ++i, curr += inc) {
+ ir_type *param_type = get_method_param_type(method_type, curr);
+ be_abi_call_arg_t *arg = get_call_arg(call, 0, curr);
+
+ map[i] = NULL;
+ if (arg->on_stack) {
+ if (val_param_tp) {
+ /* the entity was already created, move it to the param type */
+ arg->stack_ent = get_method_value_param_ent(method_type, i);
+ remove_struct_member(val_param_tp, arg->stack_ent);
+ set_entity_owner(arg->stack_ent, res);
+ add_struct_member(res, arg->stack_ent);
+ /* must be automatic to set a fixed layout */
+ set_entity_allocation(arg->stack_ent, allocation_automatic);
+ }
+ else {
+ snprintf(buf, sizeof(buf), "param_%d", i);
+ arg->stack_ent = new_entity(res, new_id_from_str(buf), param_type);
+ }
+ ofs += arg->space_before;
+ ofs = round_up2(ofs, arg->alignment);
+ set_entity_offset(arg->stack_ent, ofs);
+ ofs += arg->space_after;
+ ofs += get_type_size_bytes(param_type);
+ map[i] = arg->stack_ent;
+ }
+ }
+ set_type_size_bytes(res, ofs);
+ set_type_state(res, layout_fixed);
+ return res;
+}
+
+#if 0
+static void create_register_perms(const arch_isa_t *isa, ir_graph *irg, ir_node *bl, pmap *regs)
+{
+ int i, j, n;
+ struct obstack obst;
+
+ obstack_init(&obst);
+
+ /* Create a Perm after the RegParams node to delimit it. */
+ for(i = 0, n = arch_isa_get_n_reg_class(isa); i < n; ++i) {
+ const arch_register_class_t *cls = arch_isa_get_reg_class(isa, i);
+ ir_node *perm;
+ ir_node **in;
+ int n_regs;
+
+ for(n_regs = 0, j = 0; j < cls->n_regs; ++j) {
+ const arch_register_t *reg = &cls->regs[j];
+ ir_node *irn = pmap_get(regs, (void *) reg);
+
+ if(irn && !arch_register_type_is(reg, ignore)) {
+ n_regs++;
+ obstack_ptr_grow(&obst, irn);
+ set_irn_link(irn, (void *) reg);
+ }
+ }
+
+ obstack_ptr_grow(&obst, NULL);
+ in = obstack_finish(&obst);
+ if(n_regs > 0) {
+ perm = be_new_Perm(cls, irg, bl, n_regs, in);
+ for(j = 0; j < n_regs; ++j) {
+ ir_node *arg = in[j];
+ arch_register_t *reg = get_irn_link(arg);
+ pmap_insert(regs, reg, arg);
+ be_set_constr_single_reg(perm, BE_OUT_POS(j), reg);
+ }
+ }
+ obstack_free(&obst, in);
+ }
+
+ obstack_free(&obst, NULL);
+}
+#endif
+
+typedef struct {
+ const arch_register_t *reg;
+ ir_node *irn;
+} reg_node_map_t;
+
+static int cmp_regs(const void *a, const void *b)
+{
+ const reg_node_map_t *p = a;
+ const reg_node_map_t *q = b;
+
+ if(p->reg->reg_class == q->reg->reg_class)
+ return p->reg->index - q->reg->index;
+ else
+ return p->reg->reg_class - q->reg->reg_class;
+}
+
+static reg_node_map_t *reg_map_to_arr(struct obstack *obst, pmap *reg_map)
+{
+ pmap_entry *ent;
+ int n = pmap_count(reg_map);
+ int i = 0;
+ reg_node_map_t *res = obstack_alloc(obst, n * sizeof(res[0]));
+
+ pmap_foreach(reg_map, ent) {
+ res[i].reg = ent->key;
+ res[i].irn = ent->value;
+ i++;
+ }
+
+ qsort(res, n, sizeof(res[0]), cmp_regs);
+ return res;
+}
+
+/**
+ * Creates a barrier.
+ */
+static ir_node *create_barrier(be_abi_irg_t *env, ir_node *bl, ir_node **mem, pmap *regs, int in_req)
+{
+ ir_graph *irg = env->birg->irg;
+ int n_regs = pmap_count(regs);
+ int n;
+ ir_node *irn;
+ ir_node **in;
+ reg_node_map_t *rm;
+
+ rm = reg_map_to_arr(&env->obst, regs);
+
+ for(n = 0; n < n_regs; ++n)
+ obstack_ptr_grow(&env->obst, rm[n].irn);
+
+ if(mem) {
+ obstack_ptr_grow(&env->obst, *mem);
+ n++;
+ }
+
+ in = (ir_node **) obstack_finish(&env->obst);
+ irn = be_new_Barrier(irg, bl, n, in);
+ obstack_free(&env->obst, in);
+
+ for(n = 0; n < n_regs; ++n) {
+ const arch_register_t *reg = rm[n].reg;
+ int flags = 0;
+ int pos = BE_OUT_POS(n);
+ ir_node *proj;
+
+ proj = new_r_Proj(irg, bl, irn, get_irn_mode(rm[n].irn), n);
+ be_node_set_reg_class(irn, n, reg->reg_class);
+ if(in_req)
+ be_set_constr_single_reg(irn, n, reg);
+ be_set_constr_single_reg(irn, pos, reg);
+ be_node_set_reg_class(irn, pos, reg->reg_class);
+ arch_set_irn_register(env->birg->main_env->arch_env, proj, reg);
+
+ /* if the proj projects a ignore register or a node which is set to ignore, propagate this property. */
+ if(arch_register_type_is(reg, ignore) || arch_irn_is(env->birg->main_env->arch_env, in[n], ignore))
+ flags |= arch_irn_flags_ignore;
+
+ if(arch_irn_is(env->birg->main_env->arch_env, in[n], modify_sp))
+ flags |= arch_irn_flags_modify_sp;
+
+ be_node_set_flags(irn, pos, flags);
+
+ pmap_insert(regs, (void *) reg, proj);
+ }
+
+ if(mem) {
+ *mem = new_r_Proj(irg, bl, irn, mode_M, n);
+ }
+
+ obstack_free(&env->obst, rm);
+ return irn;
+}
+
+/**
+ * Creates a be_Return for a Return node.
+ *
+ * @param @env the abi environment
+ * @param irn the Return node or NULL if there was none
+ * @param bl the block where the be_Retun should be placed
+ * @param mem the current memory
+ * @param n_res number of return results
+ */
+static ir_node *create_be_return(be_abi_irg_t *env, ir_node *irn, ir_node *bl, ir_node *mem, int n_res) {
+ be_abi_call_t *call = env->call;
+ const arch_isa_t *isa = env->birg->main_env->arch_env->isa;
+
+ pmap *reg_map = pmap_create();
+ ir_node *keep = pmap_get(env->keep_map, bl);
+ int in_max;
+ ir_node *ret;
+ int i, n;
+ ir_node **in;
+ ir_node *stack;
+ const arch_register_t **regs;
+ pmap_entry *ent ;
+
+ /*
+ get the valid stack node in this block.
+ If we had a call in that block there is a Keep constructed by process_calls()
+ which points to the last stack modification in that block. we'll use
+ it then. Else we use the stack from the start block and let
+ the ssa construction fix the usage.
+ */
+ stack = be_abi_reg_map_get(env->regs, isa->sp);
+ if (keep) {
+ ir_node *bad = new_r_Bad(env->birg->irg);
+ stack = get_irn_n(keep, 0);
+ set_nodes_block(keep, bad);
+ set_irn_n(keep, 0, bad);
+ // exchange(keep, new_r_Bad(env->birg->irg));
+ }
+
+ /* Insert results for Return into the register map. */
+ for(i = 0; i < n_res; ++i) {
+ ir_node *res = get_Return_res(irn, i);
+ be_abi_call_arg_t *arg = get_call_arg(call, 1, i);
+ assert(arg->in_reg && "return value must be passed in register");
+ pmap_insert(reg_map, (void *) arg->reg, res);
+ }
+
+ /* Add uses of the callee save registers. */
+ pmap_foreach(env->regs, ent) {
+ const arch_register_t *reg = ent->key;
+ if(arch_register_type_is(reg, callee_save) || arch_register_type_is(reg, ignore))
+ pmap_insert(reg_map, ent->key, ent->value);
+ }
+
+ be_abi_reg_map_set(reg_map, isa->sp, stack);
+
+ /* Make the Epilogue node and call the arch's epilogue maker. */
+ create_barrier(env, bl, &mem, reg_map, 1);
+ call->cb->epilogue(env->cb, bl, &mem, reg_map);
+
+ /*
+ Maximum size of the in array for Return nodes is
+ return args + callee save/ignore registers + memory + stack pointer
+ */
+ in_max = pmap_count(reg_map) + n_res + 2;
+
+ in = obstack_alloc(&env->obst, in_max * sizeof(in[0]));
+ regs = obstack_alloc(&env->obst, in_max * sizeof(regs[0]));
+
+ in[0] = mem;
+ in[1] = be_abi_reg_map_get(reg_map, isa->sp);
+ regs[0] = NULL;
+ regs[1] = isa->sp;
+ n = 2;
+
+ /* clear SP entry, since it has already been grown. */
+ pmap_insert(reg_map, (void *) isa->sp, NULL);
+ for(i = 0; i < n_res; ++i) {
+ be_abi_call_arg_t *arg = get_call_arg(call, 1, i);
+
+ in[n] = be_abi_reg_map_get(reg_map, arg->reg);
+ regs[n++] = arg->reg;
+
+ /* Clear the map entry to mark the register as processed. */
+ be_abi_reg_map_set(reg_map, arg->reg, NULL);
+ }
+
+ /* grow the rest of the stuff. */
+ pmap_foreach(reg_map, ent) {
+ if(ent->value) {
+ in[n] = ent->value;
+ regs[n++] = ent->key;
+ }
}
- max_arg += 1;
- args = obstack_alloc(&env->obst, max_arg * sizeof(args[0]));
- args_repl = obstack_alloc(&env->obst, max_arg * sizeof(args[0]));
- memset(args, 0, max_arg * sizeof(args[0]));
- memset(args_repl, 0, max_arg * sizeof(args[0]));
+
+ /* The in array for the new back end return is now ready. */
+ ret = be_new_Return(irn ? get_irn_dbg_info(irn) : NULL, env->birg->irg, bl, n_res, n, in);
+
+ /* Set the register classes of the return's parameter accordingly. */
+ for(i = 0; i < n; ++i)
+ if(regs[i])
+ be_node_set_reg_class(ret, i, regs[i]->reg_class);
+
+ /* Free the space of the Epilog's in array and the register <-> proj map. */
+ obstack_free(&env->obst, in);
+ pmap_destroy(reg_map);
+
+ return ret;
+}
+
+typedef struct lower_frame_sels_env_t {
+ be_abi_irg_t *env;
+ ir_entity *value_param_list; /**< the list of all value param entities */
+} lower_frame_sels_env_t;
+
+/**
+ * Walker: Replaces Sels of frame type and
+ * value param type entities by FrameAddress.
+ */
+static void lower_frame_sels_walker(ir_node *irn, void *data)
+{
+ lower_frame_sels_env_t *ctx = data;
+
+ if (is_Sel(irn)) {
+ ir_graph *irg = current_ir_graph;
+ ir_node *frame = get_irg_frame(irg);
+ ir_node *param_base = get_irg_value_param_base(irg);
+ ir_node *ptr = get_Sel_ptr(irn);
+
+ if (ptr == frame || ptr == param_base) {
+ be_abi_irg_t *env = ctx->env;
+ ir_entity *ent = get_Sel_entity(irn);
+ ir_node *bl = get_nodes_block(irn);
+ ir_node *nw;
+
+ nw = be_new_FrameAddr(env->isa->sp->reg_class, irg, bl, frame, ent);
+ exchange(irn, nw);
+
+ /* check, if it's a param sel and if have not seen this entity immediatly before */
+ if (ptr == param_base && ctx->value_param_list != ent) {
+ set_entity_link(ent, ctx->value_param_list);
+ ctx->value_param_list = ent;
+ }
+ }
+ }
+}
+
+/**
+ * Check if a value parameter is transmitted as a register.
+ * This might happen if the address of an parameter is taken which is
+ * transmitted in registers.
+ *
+ * Note that on some architectures this case must be handled specially
+ * because the place of the backing store is determined by their ABI.
+ *
+ * In the default case we move the entity to the frame type and create
+ * a backing store into the first block.
+ */
+static void fix_address_of_parameter_access(be_abi_irg_t *env, ir_entity *value_param_list) {
+ be_abi_call_t *call = env->call;
+ ir_graph *irg = env->birg->irg;
+ ir_entity *ent, *next_ent, *new_list;
+ ir_type *frame_tp;
+ DEBUG_ONLY(firm_dbg_module_t *dbg = env->dbg;)
+
+ new_list = NULL;
+ for (ent = value_param_list; ent; ent = next_ent) {
+ int i = get_struct_member_index(get_entity_owner(ent), ent);
+ be_abi_call_arg_t *arg = get_call_arg(call, 0, i);
+
+ next_ent = get_entity_link(ent);
+ if (arg->in_reg) {
+ DBG((dbg, LEVEL_2, "\targ #%d need backing store\n", i));
+ set_entity_link(ent, new_list);
+ new_list = ent;
+ }
+ }
+ if (new_list) {
+ /* ok, change the graph */
+ ir_node *start_bl = get_irg_start_block(irg);
+ ir_node *first_bl = NULL;
+ ir_node *frame, *imem, *nmem, *store, *mem, *args, *args_bl;
+ const ir_edge_t *edge;
+ optimization_state_t state;
+ int offset;
+
+ foreach_block_succ(start_bl, edge) {
+ ir_node *succ = get_edge_src_irn(edge);
+ if (start_bl != succ) {
+ first_bl = succ;
+ break;
+ }
+ }
+ assert(first_bl);
+ /* we had already removed critical edges, so the following
+ assertion should be always true. */
+ assert(get_Block_n_cfgpreds(first_bl) == 1);
+
+ /* now create backing stores */
+ frame = get_irg_frame(irg);
+ imem = get_irg_initial_mem(irg);
+
+ save_optimization_state(&state);
+ set_optimize(0);
+ nmem = new_r_Proj(irg, first_bl, get_irg_start(irg), mode_M, pn_Start_M);
+ restore_optimization_state(&state);
+
+ /* reroute all edges to the new memory source */
+ edges_reroute(imem, nmem, irg);
+
+ store = NULL;
+ mem = imem;
+ args = get_irg_args(irg);
+ args_bl = get_nodes_block(args);
+ for (ent = new_list; ent; ent = get_entity_link(ent)) {
+ int i = get_struct_member_index(get_entity_owner(ent), ent);
+ ir_type *tp = get_entity_type(ent);
+ ir_mode *mode = get_type_mode(tp);
+ ir_node *addr;
+
+ /* address for the backing store */
+ addr = be_new_FrameAddr(env->isa->sp->reg_class, irg, first_bl, frame, ent);
+
+ if (store)
+ mem = new_r_Proj(irg, first_bl, store, mode_M, pn_Store_M);
+
+ /* the backing store itself */
+ store = new_r_Store(irg, first_bl, mem, addr,
+ new_r_Proj(irg, args_bl, args, mode, i));
+ }
+ /* the new memory Proj gets the last Proj from store */
+ set_Proj_pred(nmem, store);
+ set_Proj_proj(nmem, pn_Store_M);
+
+ /* move all entities to the frame type */
+ frame_tp = get_irg_frame_type(irg);
+ offset = get_type_size_bytes(frame_tp);
+ for (ent = new_list; ent; ent = get_entity_link(ent)) {
+ ir_type *tp = get_entity_type(ent);
+ int align = get_type_alignment_bytes(tp);
+
+ offset += align - 1;
+ offset &= -align;
+ set_entity_owner(ent, frame_tp);
+ add_class_member(frame_tp, ent);
+ /* must be automatic to set a fixed layout */
+ set_entity_allocation(ent, allocation_automatic);
+ set_entity_offset(ent, offset);
+ offset += get_type_size_bytes(tp);
+ }
+ set_type_size_bytes(frame_tp, offset);
+ }
+}
+
+/**
+ * The start block has no jump, instead it has an initial exec Proj.
+ * The backend wants to handle all blocks the same way, so we replace
+ * the out cfg edge with a real jump.
+ */
+static void fix_start_block(ir_node *block, void *env) {
+ int *done = env;
+ int i;
+ ir_node *start_block;
+ ir_graph *irg;
+
+ /* we processed the start block, return */
+ if (*done)
+ return;
+
+ irg = get_irn_irg(block);
+ start_block = get_irg_start_block(irg);
+
+ for (i = get_Block_n_cfgpreds(block) - 1; i >= 0; --i) {
+ ir_node *pred = get_Block_cfgpred(block, i);
+ ir_node *pred_block = get_nodes_block(pred);
+
+ /* ok, we are in the block, having start as cfg predecessor */
+ if (pred_block == start_block) {
+ ir_node *jump = new_r_Jmp(irg, pred_block);
+ set_Block_cfgpred(block, i, jump);
+ *done = 1;
+ }
+ }
+}
+
+/**
+ * Modify the irg itself and the frame type.
+ */
+static void modify_irg(be_abi_irg_t *env)
+{
+ be_abi_call_t *call = env->call;
+ const arch_isa_t *isa = env->birg->main_env->arch_env->isa;
+ const arch_register_t *sp = arch_isa_sp(isa);
+ ir_graph *irg = env->birg->irg;
+ ir_node *bl = get_irg_start_block(irg);
+ ir_node *end = get_irg_end_block(irg);
+ ir_node *old_mem = get_irg_initial_mem(irg);
+ ir_node *new_mem_proj;
+ ir_node *mem;
+ ir_type *method_type = get_entity_type(get_irg_entity(irg));
+ pset *dont_save = pset_new_ptr(8);
+
+ int n_params;
+ int i, j, n, temp;
+
+ reg_node_map_t *rm;
+ const arch_register_t *fp_reg;
+ ir_node *frame_pointer;
+ ir_node *barrier;
+ ir_node *reg_params_bl;
+ ir_node **args;
+ ir_node *arg_tuple;
+ ir_node *value_param_base;
+ const ir_edge_t *edge;
+ ir_type *arg_type, *bet_type;
+ lower_frame_sels_env_t ctx;
+ ir_entity **param_map;
+
+ bitset_t *used_proj_nr;
+ DEBUG_ONLY(firm_dbg_module_t *dbg = env->dbg;)
+
+ DBG((dbg, LEVEL_1, "introducing abi on %+F\n", irg));
+
+ /* Convert the Sel nodes in the irg to frame load/store/addr nodes. */
+ ctx.env = env;
+ ctx.value_param_list = NULL;
+ irg_walk_graph(irg, lower_frame_sels_walker, NULL, &ctx);
+
+ /* value_param_base anchor is not needed anymore now */
+ value_param_base = get_irg_value_param_base(irg);
+ be_kill_node(value_param_base);
+ set_irg_value_param_base(irg, new_r_Bad(irg));
+
+ env->frame = obstack_alloc(&env->obst, sizeof(env->frame[0]));
+ env->regs = pmap_create();
+
+ used_proj_nr = bitset_alloca(1024);
+ n_params = get_method_n_params(method_type);
+ args = obstack_alloc(&env->obst, n_params * sizeof(args[0]));
+ memset(args, 0, n_params * sizeof(args[0]));
+
+ /* Check if a value parameter is transmitted as a register.
+ * This might happen if the address of an parameter is taken which is
+ * transmitted in registers.
+ *
+ * Note that on some architectures this case must be handled specially
+ * because the place of the backing store is determined by their ABI.
+ *
+ * In the default case we move the entity to the frame type and create
+ * a backing store into the first block.
+ */
+ fix_address_of_parameter_access(env, ctx.value_param_list);
/* Fill the argument vector */
+ arg_tuple = get_irg_args(irg);
foreach_out_edge(arg_tuple, edge) {
ir_node *irn = get_edge_src_irn(edge);
int nr = get_Proj_proj(irn);
DBG((dbg, LEVEL_2, "\treading arg: %d -> %+F\n", nr, irn));
}
- /* Get the ABI constraints from the ISA */
- arch_isa_get_call_abi(isa, method_type, call);
+ arg_type = compute_arg_type(env, call, method_type, ¶m_map);
+ bet_type = call->cb->get_between_type(env->cb);
+ stack_frame_init(env->frame, arg_type, bet_type, get_irg_frame_type(irg), isa->stack_dir, param_map);
/* Count the register params and add them to the number of Projs for the RegParams node */
for(i = 0; i < n_params; ++i) {
be_abi_call_arg_t *arg = get_call_arg(call, 0, i);
- if(arg->in_reg) {
+ if(arg->in_reg && args[i]) {
assert(arg->reg != sp && "cannot use stack pointer as parameter register");
- pmap_insert(env->regs, (void *) arg->reg, NULL);
+ assert(i == get_Proj_proj(args[i]));
+
+ /* For now, associate the register with the old Proj from Start representing that argument. */
+ pmap_insert(env->regs, (void *) arg->reg, args[i]);
+ bitset_set(used_proj_nr, i);
DBG((dbg, LEVEL_2, "\targ #%d -> reg %s\n", i, arg->reg->name));
}
}
const arch_register_class_t *cls = arch_isa_get_reg_class(isa, i);
for(j = 0; j < cls->n_regs; ++j) {
const arch_register_t *reg = &cls->regs[j];
- if(arch_register_type_is(reg, callee_save))
+ if(arch_register_type_is(reg, callee_save) ||
+ arch_register_type_is(reg, state)) {
pmap_insert(env->regs, (void *) reg, NULL);
+ }
}
}
pmap_insert(env->regs, (void *) sp, NULL);
pmap_insert(env->regs, (void *) isa->bp, NULL);
- reg_params_bl = get_irg_start_block(irg);
- env->reg_params = reg_params = be_new_RegParams(irg, reg_params_bl, pmap_count(env->regs));
- reg_params_nr = 0;
+ reg_params_bl = get_irg_start_block(irg);
+ env->reg_params = be_new_RegParams(irg, reg_params_bl, pmap_count(env->regs));
+ add_irn_dep(env->reg_params, get_irg_start(irg));
/*
* make proj nodes for the callee save registers.
* memorize them, since Return nodes get those as inputs.
+ *
+ * Note, that if a register corresponds to an argument, the regs map contains
+ * the old Proj from start for that argument.
*/
- for(ent = pmap_first(env->regs); ent; ent = pmap_next(env->regs)) {
- arch_register_t *reg = ent->key;
- int pos = -(reg_params_nr + 1);
- ent->value = new_r_Proj(irg, reg_params_bl, reg_params, reg->reg_class->mode, reg_params_nr);
- be_set_constr_single_reg(reg_params, pos, reg);
+
+ rm = reg_map_to_arr(&env->obst, env->regs);
+ for(i = 0, n = pmap_count(env->regs); i < n; ++i) {
+ arch_register_t *reg = (void *) rm[i].reg;
+ ir_mode *mode = reg->reg_class->mode;
+ long nr = i;
+ int pos = BE_OUT_POS((int) nr);
+ int flags = 0;
+
+ ir_node *proj;
+
+ assert(nr >= 0);
+ bitset_set(used_proj_nr, nr);
+ proj = new_r_Proj(irg, reg_params_bl, env->reg_params, mode, nr);
+ pmap_insert(env->regs, (void *) reg, proj);
+ be_set_constr_single_reg(env->reg_params, pos, reg);
+ arch_set_irn_register(env->birg->main_env->arch_env, proj, reg);
/*
* If the register is an ignore register,
* The Proj for that register shall also be ignored during register allocation.
*/
if(arch_register_type_is(reg, ignore))
- be_node_set_flags(reg_params, pos, arch_irn_flags_ignore);
+ flags |= arch_irn_flags_ignore;
+
+ if(reg == sp)
+ flags |= arch_irn_flags_modify_sp;
- reg_params_nr++;
+ be_node_set_flags(env->reg_params, pos, flags);
- DBG((dbg, LEVEL_2, "\tregister save proj #%d -> reg %s\n", reg_params_nr - 1, reg->name));
+ DBG((dbg, LEVEL_2, "\tregister save proj #%d -> reg %s\n", nr, reg->name));
}
+ obstack_free(&env->obst, rm);
- /* Insert the code to set up the stack frame */
- frame_pointer = setup_frame(env);
+ /* create a new initial memory proj */
+ assert(is_Proj(old_mem));
+ new_mem_proj = new_r_Proj(irg, get_nodes_block(old_mem),
+ new_r_Unknown(irg, mode_T), mode_M,
+ get_Proj_proj(old_mem));
+ mem = new_mem_proj;
-#if 0
- proj_sp = pmap_get(regs, (void *) sp);
- proj_bp = pmap_get(regs, (void *) bp);
- assert(proj_sp != NULL && "There must be a Proj for the stack pointer");
- assert(proj_sp != NULL && "There must be a Proj for the base pointer");
+ /* Generate the Prologue */
+ fp_reg = call->cb->prologue(env->cb, &mem, env->regs);
- /* Set the Proj for the stack pointer to ignore. */
- be_node_set_flags(reg_params, -(get_Proj_proj(proj_sp) + 1), arch_irn_flags_ignore);
+ /* do the stack allocation BEFORE the barrier, or spill code
+ might be added before it */
+ env->init_sp = be_abi_reg_map_get(env->regs, sp);
+ env->init_sp = be_new_IncSP(sp, irg, bl, env->init_sp, BE_STACK_FRAME_SIZE_EXPAND);
+ be_abi_reg_map_set(env->regs, sp, env->init_sp);
- /*
- * If a frame pointer is needed and the frame pointer is in a dedicated register,
- * also exclude that from register allocation by setting the corresponding
- * Proj to ignore.
- */
- if(!env->omit_fp && env->dedicated_fp)
- be_node_set_flags(reg_params, -(get_Proj_proj(proj_bp) + 1), arch_irn_flags_ignore);
+ env->start_barrier = barrier = create_barrier(env, bl, &mem, env->regs, 0);
+ env->init_sp = be_abi_reg_map_get(env->regs, sp);
+ arch_set_irn_register(env->birg->main_env->arch_env, env->init_sp, sp);
- if(env->omit_fp) {
- /* This is the stack pointer add/sub which allocates the frame. remind it for later fix up. */
- env->init_sp = be_new_IncSP(sp, irg, reg_params_bl, proj_sp, no_mem, 0, be_stack_dir_along);
- frame_pointer = env->init_sp;
- }
-
- else {
- env->init_sp = proj_sp;
- frame_pointer = be_new_Copy(sp->reg_class, irg, reg_params_bl, proj_sp);
- }
-
- /* Set the new frame pointer. */
- exchange(get_irg_frame(irg), frame_pointer);
+ frame_pointer = be_abi_reg_map_get(env->regs, fp_reg);
set_irg_frame(irg, frame_pointer);
-#endif
+ pset_insert_ptr(env->ignore_regs, fp_reg);
- /* compute the start offset for the stack parameters. */
- {
- int arg_offset = 0;
- int arg_size = 0;
- int inc_dir = isa->stack_dir * (env->left_to_right ? 1 : -1);
+ /* rewire old mem users to new mem */
+ set_Proj_pred(new_mem_proj, get_Proj_pred(old_mem));
+ exchange(old_mem, mem);
- for(i = 0; i < n_params; ++i) {
- be_abi_call_arg_t *arg = get_call_arg(call, 0, i);
- if(!arg->in_reg)
- arg_size += get_type_size_bytes(get_method_param_type(method_type, i));
- }
+ set_irg_initial_mem(irg, mem);
- arg_offset = -isa->stack_dir * call->arg_gap + env->left_to_right * arg_size;
+ /* Now, introduce stack param nodes for all parameters passed on the stack */
+ for(i = 0; i < n_params; ++i) {
+ ir_node *arg_proj = args[i];
+ ir_node *repl = NULL;
- /* Now, introduce stack param nodes for all parameters passed on the stack */
- for(i = 0; i < max_arg; ++i) {
- ir_node *arg_proj = args[i];
- if(arg_proj != NULL) {
- be_abi_call_arg_t *arg;
- ir_type *param_type;
- int nr = get_Proj_proj(arg_proj);
+ if(arg_proj != NULL) {
+ be_abi_call_arg_t *arg;
+ ir_type *param_type;
+ int nr = get_Proj_proj(arg_proj);
- nr = MIN(nr, n_params);
- arg = get_call_arg(call, 0, nr);
- param_type = get_method_param_type(method_type, nr);
+ nr = MIN(nr, n_params);
+ arg = get_call_arg(call, 0, nr);
+ param_type = get_method_param_type(method_type, nr);
- if(arg->in_reg) {
- args_repl[i] = new_r_Proj(irg, reg_params_bl, reg_params, get_irn_mode(arg_proj), reg_params_nr);
- be_set_constr_single_reg(reg_params, -(reg_params_nr + 1), arg->reg);
- reg_params_nr++;
+ if(arg->in_reg) {
+ repl = pmap_get(env->regs, (void *) arg->reg);
+ }
+
+ else if(arg->on_stack) {
+ /* For atomic parameters which are actually used, we create a StackParam node. */
+ if(is_atomic_type(param_type) && get_irn_n_edges(args[i]) > 0) {
+ ir_mode *mode = get_type_mode(param_type);
+ const arch_register_class_t *cls = arch_isa_get_reg_class_for_mode(isa, mode);
+ repl = be_new_StackParam(cls, isa->bp->reg_class, irg, reg_params_bl, mode, frame_pointer, arg->stack_ent);
}
- /* when the (stack) parameter is primitive, we insert a StackParam
- node representing the load of that parameter */
+ /* The stack parameter is not primitive (it is a struct or array),
+ we thus will create a node representing the parameter's address
+ on the stack. */
else {
- int size = get_type_size_bytes(param_type) * isa->stack_dir;
-
- if(inc_dir < 0)
- arg_offset -= size;
-
- /* For atomic parameters which are actually used, we create a StackParam node. */
- if(is_atomic_type(param_type) && get_irn_n_edges(args[i]) > 0) {
- ir_mode *mode = get_type_mode(param_type);
- const arch_register_class_t *cls = arch_isa_get_reg_class_for_mode(isa, mode);
- args_repl[i] = be_new_StackParam(cls, irg, reg_params_bl, mode, frame_pointer, arg_offset);
- }
-
- /* The stack parameter is not primitive (it is a struct or array),
- we thus will create a node representing the parameter's address
- on the stack. */
- else {
- assert(0 && "struct parameters are not supported");
- }
-
- if(inc_dir > 0)
- arg_offset += size;
+ repl = be_new_FrameAddr(sp->reg_class, irg, reg_params_bl, frame_pointer, arg->stack_ent);
}
}
- }
- }
- /* reroute the edges from the original argument projs to the RegParam ones. */
- for(i = 0; i < max_arg; ++i) {
- if(args[i] != NULL) {
- assert(args_repl[i] != NULL);
- edges_reroute(args[i], args_repl[i], irg);
+ assert(repl != NULL);
+ exchange(args[i], repl);
}
}
- /* All Return nodes hang on the End node, so look for them there. */
- for(i = 0, n = get_irn_arity(end); i < n; ++i) {
- ir_node *irn = get_irn_n(end, i);
-
- if(get_irn_opcode(irn) == iro_Return) {
- ir_node *bl = get_nodes_block(irn);
- int n_res = get_Return_n_ress(irn);
- pmap *reg_map = pmap_create_ex(n_res);
- ir_node *ret;
- int i, n;
- ir_node **in;
-
- /* collect all arguments of the return */
- for(i = 0; i < n_res; ++i) {
- ir_node *res = get_Return_res(irn, i);
- be_abi_call_arg_t *arg = get_call_arg(call, 1, i);
-
- assert(arg->in_reg && "return value must be passed in register");
- pmap_insert(reg_map, res, (void *) arg->reg);
- obstack_ptr_grow(&env->obst, res);
- }
-
- /* generate the clean up code and add additional parameters to the return. */
- clearup_frame(env, bl, &env->obst);
+ /* the arg proj is not needed anymore now */
+ assert(get_irn_n_edges(arg_tuple) == 0);
+ be_kill_node(arg_tuple);
+ set_irg_args(irg, new_rd_Bad(irg));
- /* The in array for the new back end return is now ready. */
- n = obstack_object_size(&env->obst) / sizeof(in[0]);
- in = obstack_finish(&env->obst);
- ret = be_new_Return(irg, bl, n, in);
+ /* All Return nodes hang on the End node, so look for them there. */
+ for (i = 0, n = get_Block_n_cfgpreds(end); i < n; ++i) {
+ ir_node *irn = get_Block_cfgpred(end, i);
- /* Set the constraints for some arguments of the return. */
- for(i = 0; i < n; i++) {
- const arch_register_t *reg = pmap_get(reg_map, in[i]);
- if(reg != NULL)
- be_set_constr_single_reg(ret, i, reg);
- }
+ if (is_Return(irn)) {
+ ir_node *ret = create_be_return(env, irn, get_nodes_block(irn), get_Return_mem(irn), get_Return_n_ress(irn));
exchange(irn, ret);
- obstack_free(&env->obst, in);
- pmap_destroy(reg_map);
}
}
+ /* if we have endless loops here, n might be <= 0. Do NOT create a be_Return then,
+ the code is dead and will never be executed. */
+ del_pset(dont_save);
obstack_free(&env->obst, args);
- be_abi_call_free(call);
+
+ /* handle start block here (place a jump in the block) */
+ temp = 0;
+ irg_block_walk_graph(irg, fix_start_block, NULL, &temp);
}
-static void collect_alloca_walker(ir_node *irn, void *data)
+/** Fix the state inputs of calls that still hang on unknowns */
+static
+void fix_call_state_inputs(be_abi_irg_t *env)
{
- be_abi_irg_t *env = data;
- if(get_irn_opcode(irn) == iro_Alloc && get_Alloc_where(irn) == stack_alloc)
- obstack_ptr_grow(&env->obst, irn);
+ const arch_isa_t *isa = env->isa;
+ int i, n, n_states;
+ arch_register_t **stateregs = NEW_ARR_F(arch_register_t*, 0);
+
+ /* Collect caller save registers */
+ n = arch_isa_get_n_reg_class(isa);
+ for(i = 0; i < n; ++i) {
+ int j;
+ const arch_register_class_t *cls = arch_isa_get_reg_class(isa, i);
+ for(j = 0; j < cls->n_regs; ++j) {
+ const arch_register_t *reg = arch_register_for_index(cls, j);
+ if(arch_register_type_is(reg, state)) {
+ ARR_APP1(arch_register_t*, stateregs, (arch_register_t *)reg);
+ }
+ }
+ }
+
+ n = ARR_LEN(env->calls);
+ n_states = ARR_LEN(stateregs);
+ for(i = 0; i < n; ++i) {
+ int s, arity;
+ ir_node *call = env->calls[i];
+
+ arity = get_irn_arity(call);
+
+ /* the statereg inputs are the last n inputs of the calls */
+ for(s = 0; s < n_states; ++s) {
+ int inp = arity - n_states + s;
+ const arch_register_t *reg = stateregs[s];
+ ir_node *regnode = be_abi_reg_map_get(env->regs, reg);
+
+ set_irn_n(call, inp, regnode);
+ }
+ }
}
be_abi_irg_t *be_abi_introduce(be_irg_t *birg)
{
- be_abi_irg_t *env = malloc(sizeof(env[0]));
+ be_abi_irg_t *env = xmalloc(sizeof(env[0]));
+ ir_node *old_frame = get_irg_frame(birg->irg);
+ ir_graph *irg = birg->irg;
+
+ pmap_entry *ent;
+ ir_node *dummy;
+ optimization_state_t state;
+ unsigned *limited_bitset;
+
+ be_omit_fp = birg->main_env->options->omit_fp;
- int i;
- ir_node **stack_allocs;
-
- env->method_type = get_entity_type(get_irg_entity(birg->irg));
- env->call = be_abi_call_new();
- arch_isa_get_call_abi(birg->main_env->arch_env->isa, env->method_type, env->call);
-
- env->omit_fp = (env->call->flags & BE_ABI_TRY_OMIT_FRAME_POINTER) != 0;
- env->dedicated_fp = (env->call->flags & BE_ABI_FRAME_POINTER_DEDICATED) != 0;
- env->left_to_right = (env->call->flags & BE_ABI_LEFT_TO_RIGHT) != 0;
- env->birg = birg;
- env->stack_ops = pset_new_ptr(32);
- env->dbg = firm_dbg_register("firm.be.abi");
obstack_init(&env->obst);
- /* search for stack allocation nodes and record them */
- irg_walk_graph(env->birg->irg, collect_alloca_walker, NULL, env);
- obstack_ptr_grow(&env->obst, NULL);
- stack_allocs = obstack_finish(&env->obst);
+ env->isa = birg->main_env->arch_env->isa;
+ env->method_type = get_entity_type(get_irg_entity(irg));
+ env->call = be_abi_call_new(env->isa->sp->reg_class);
+ arch_isa_get_call_abi(env->isa, env->method_type, env->call);
+
+ env->ignore_regs = pset_new_ptr_default();
+ env->keep_map = pmap_create();
+ env->dce_survivor = new_survive_dce();
+ env->birg = birg;
+
+ env->sp_req.type = arch_register_req_type_limited;
+ env->sp_req.cls = arch_register_get_class(env->isa->sp);
+ limited_bitset = rbitset_obstack_alloc(&env->obst, env->sp_req.cls->n_regs);
+ rbitset_set(limited_bitset, arch_register_get_index(env->isa->sp));
+ env->sp_req.limited = limited_bitset;
+
+ env->sp_cls_req.type = arch_register_req_type_normal;
+ env->sp_cls_req.cls = arch_register_get_class(env->isa->sp);
- /* If there are stack allocations in the irg, we need a frame pointer */
- if(stack_allocs[0] != NULL)
- env->omit_fp = 0;
+ /* Beware: later we replace this node by the real one, ensure it is not CSE'd
+ to another Unknown or the stack pointer gets used */
+ save_optimization_state(&state);
+ set_optimize(0);
+ env->init_sp = dummy = new_r_Unknown(irg, env->isa->sp->reg_class->mode);
+ restore_optimization_state(&state);
+ FIRM_DBG_REGISTER(env->dbg, "firm.be.abi");
+ env->calls = NEW_ARR_F(ir_node*, 0);
+
+ /* Lower all call nodes in the IRG. */
+ process_calls(env);
+
+ /*
+ Beware: init backend abi call object after processing calls,
+ otherwise some information might be not yet available.
+ */
+ env->cb = env->call->cb->init(env->call, birg->main_env->arch_env, irg);
+
+ /* Process the IRG */
modify_irg(env);
- for(i = 0; stack_allocs[i] != NULL; ++i)
- implement_stack_alloc(env, stack_allocs[i]);
+ /* fix call inputs for state registers */
+ fix_call_state_inputs(env);
+
+ /* We don't need the keep map anymore. */
+ pmap_destroy(env->keep_map);
+
+ /* calls array is not needed anymore */
+ DEL_ARR_F(env->calls);
- irg_walk_graph(env->birg->irg, NULL, adjust_call_walker, env);
+ /* reroute the stack origin of the calls to the true stack origin. */
+ exchange(dummy, env->init_sp);
+ exchange(old_frame, get_irg_frame(irg));
+
+ /* Make some important node pointers survive the dead node elimination. */
+ survive_dce_register_irn(env->dce_survivor, &env->init_sp);
+ pmap_foreach(env->regs, ent) {
+ survive_dce_register_irn(env->dce_survivor, (ir_node **) &ent->value);
+ }
+
+ env->call->cb->done(env->cb);
+ env->cb = NULL;
return env;
}
-static void collect_stack_nodes(ir_node *irn, void *data)
+void be_abi_free(be_abi_irg_t *env)
+{
+ free_survive_dce(env->dce_survivor);
+ del_pset(env->ignore_regs);
+ pmap_destroy(env->regs);
+ obstack_free(&env->obst, NULL);
+ free(env);
+}
+
+void be_abi_put_ignore_regs(be_abi_irg_t *abi, const arch_register_class_t *cls, bitset_t *bs)
+{
+ arch_register_t *reg;
+
+ for(reg = pset_first(abi->ignore_regs); reg; reg = pset_next(abi->ignore_regs))
+ if(reg->reg_class == cls)
+ bitset_set(bs, reg->index);
+}
+
+/* Returns the stack layout from a abi environment. */
+const be_stack_layout_t *be_abi_get_stack_layout(const be_abi_irg_t *abi) {
+ return abi->frame;
+}
+
+/*
+
+ _____ _ ____ _ _
+ | ___(_)_ __ / ___|| |_ __ _ ___| | __
+ | |_ | \ \/ / \___ \| __/ _` |/ __| |/ /
+ | _| | |> < ___) | || (_| | (__| <
+ |_| |_/_/\_\ |____/ \__\__,_|\___|_|\_\
+
+*/
+
+typedef ir_node **node_array;
+
+typedef struct fix_stack_walker_env_t {
+ node_array sp_nodes;
+ const arch_env_t *arch_env;
+} fix_stack_walker_env_t;
+
+/**
+ * Walker. Collect all stack modifying nodes.
+ */
+static void collect_stack_nodes_walker(ir_node *node, void *data)
{
- pset *s = data;
+ fix_stack_walker_env_t *env = data;
- switch(be_get_irn_opcode(irn)) {
- case beo_IncSP:
- case beo_AddSP:
- pset_insert_ptr(s, irn);
+ if (arch_irn_is(env->arch_env, node, modify_sp)) {
+ assert(get_irn_mode(node) != mode_M && get_irn_mode(node) != mode_T);
+ ARR_APP1(ir_node*, env->sp_nodes, node);
}
}
void be_abi_fix_stack_nodes(be_abi_irg_t *env)
{
- dom_front_info_t *df;
- pset *stack_ops;
+ be_ssa_construction_env_t senv;
+ int i, len;
+ ir_node **phis;
+ be_irg_t *birg = env->birg;
+ be_lv_t *lv = be_get_birg_liveness(birg);
+ fix_stack_walker_env_t walker_env;
+ arch_isa_t *isa;
+
+ walker_env.sp_nodes = NEW_ARR_F(ir_node*, 0);
+ walker_env.arch_env = birg->main_env->arch_env;
+ isa = walker_env.arch_env->isa;
+
+ irg_walk_graph(birg->irg, collect_stack_nodes_walker, NULL, &walker_env);
+
+ /* nothing to be done if we didn't find any node, in fact we mustn't
+ * continue, as for endless loops incsp might have had no users and is bad
+ * now.
+ */
+ len = ARR_LEN(walker_env.sp_nodes);
+ if(len == 0) {
+ DEL_ARR_F(walker_env.sp_nodes);
+ return;
+ }
- /* We need dominance frontiers for fix up */
- df = be_compute_dominance_frontiers(env->birg->irg);
+ be_ssa_construction_init(&senv, birg);
+ be_ssa_construction_add_copies(&senv, walker_env.sp_nodes,
+ ARR_LEN(walker_env.sp_nodes));
+ be_ssa_construction_fix_users_array(&senv, walker_env.sp_nodes,
+ ARR_LEN(walker_env.sp_nodes));
- stack_ops = pset_new_ptr_default();
- pset_insert_ptr(env->stack_ops, env->init_sp);
- irg_walk_graph(env->birg->irg, collect_stack_nodes, NULL, stack_ops);
- be_ssa_constr_set(df, stack_ops);
- del_pset(stack_ops);
+ if(lv != NULL) {
+ len = ARR_LEN(walker_env.sp_nodes);
+ for(i = 0; i < len; ++i) {
+ be_liveness_update(lv, walker_env.sp_nodes[i]);
+ }
+ be_ssa_construction_update_liveness_phis(&senv, lv);
+ }
- /* free these dominance frontiers */
- be_free_dominance_frontiers(df);
-}
+ phis = be_ssa_construction_get_new_phis(&senv);
-static int get_dir(ir_node *irn)
-{
- return 1 - 2 * (be_get_IncSP_direction(irn) == be_stack_dir_against);
+ /* set register requirements for stack phis */
+ len = ARR_LEN(phis);
+ for(i = 0; i < len; ++i) {
+ ir_node *phi = phis[i];
+ be_set_phi_reg_req(walker_env.arch_env, phi, &env->sp_req);
+ be_set_phi_flags(walker_env.arch_env, phi, arch_irn_flags_ignore | arch_irn_flags_modify_sp);
+ arch_set_irn_register(walker_env.arch_env, phi, env->isa->sp);
+ }
+ be_ssa_construction_destroy(&senv);
+
+ DEL_ARR_F(walker_env.sp_nodes);
}
static int process_stack_bias(be_abi_irg_t *env, ir_node *bl, int bias)
{
- const arch_env_t *aenv = env->birg->main_env->arch_env;
+ const arch_env_t *arch_env = env->birg->main_env->arch_env;
+ int omit_fp = env->call->flags.bits.try_omit_fp;
ir_node *irn;
- int start_bias = bias;
sched_foreach(bl, irn) {
- if(be_is_IncSP(irn)) {
- int ofs = be_get_IncSP_offset(irn);
- int dir = get_dir(irn);
- if(ofs == BE_STACK_FRAME_SIZE) {
- ofs = get_type_size_bytes(get_irg_frame_type(env->birg->irg));
- be_set_IncSP_offset(irn, ofs);
+ /*
+ Check, if the node relates to an entity on the stack frame.
+ If so, set the true offset (including the bias) for that
+ node.
+ */
+ ir_entity *ent = arch_get_frame_entity(arch_env, irn);
+ if(ent) {
+ int offset = get_stack_entity_offset(env->frame, ent, bias);
+ arch_set_frame_offset(arch_env, irn, offset);
+ DBG((env->dbg, LEVEL_2, "%F has offset %d (including bias %d)\n", ent, offset, bias));
+ }
+
+ /*
+ If the node modifies the stack pointer by a constant offset,
+ record that in the bias.
+ */
+ if(arch_irn_is(arch_env, irn, modify_sp)) {
+ int ofs = arch_get_sp_bias(arch_env, irn);
+
+ if(be_is_IncSP(irn)) {
+ if(ofs == BE_STACK_FRAME_SIZE_EXPAND) {
+ ofs = get_type_size_bytes(get_irg_frame_type(env->birg->irg));
+ be_set_IncSP_offset(irn, ofs);
+ } else if(ofs == BE_STACK_FRAME_SIZE_SHRINK) {
+ ofs = - get_type_size_bytes(get_irg_frame_type(env->birg->irg));
+ be_set_IncSP_offset(irn, ofs);
+ }
}
- bias += dir * ofs;
+ if(omit_fp)
+ bias += ofs;
}
-
- else
- arch_set_stack_bias(aenv, irn, bias);
}
return bias;
}
+/**
+ * A helper struct for the bias walker.
+ */
+struct bias_walk {
+ be_abi_irg_t *env; /**< The ABI irg environment. */
+ int start_block_bias; /**< The bias at the end of the start block. */
+ ir_node *start_block; /**< The start block of the current graph. */
+};
+
+/**
+ * Block-Walker: fix all stack offsets
+ */
static void stack_bias_walker(ir_node *bl, void *data)
{
- if(bl != get_irg_start_block(get_irn_irg(bl))) {
- be_abi_irg_t *env = data;
- process_stack_bias(env, bl, env->start_block_bias);
+ struct bias_walk *bw = data;
+ if (bl != bw->start_block) {
+ process_stack_bias(bw->env, bl, bw->start_block_bias);
}
}
void be_abi_fix_stack_bias(be_abi_irg_t *env)
{
ir_graph *irg = env->birg->irg;
+ struct bias_walk bw;
- /* Determine the stack bias at the and of the start block. */
- env->start_block_bias = process_stack_bias(env, get_irg_start_block(irg), 0);
+ stack_frame_compute_initial_offset(env->frame);
+ // stack_layout_dump(stdout, env->frame);
+
+ /* Determine the stack bias at the end of the start block. */
+ bw.start_block_bias = process_stack_bias(env, get_irg_start_block(irg), 0);
/* fix the bias is all other blocks */
- irg_block_walk_graph(irg, stack_bias_walker, NULL, env);
+ bw.env = env;
+ bw.start_block = get_irg_start_block(irg);
+ irg_block_walk_graph(irg, stack_bias_walker, NULL, &bw);
}
-void be_abi_free(be_abi_irg_t *env)
+ir_node *be_abi_get_callee_save_irn(be_abi_irg_t *abi, const arch_register_t *reg)
{
- del_pset(env->stack_ops);
- obstack_free(&env->obst, NULL);
- free(env);
+ assert(arch_register_type_is(reg, callee_save));
+ assert(pmap_contains(abi->regs, (void *) reg));
+ return pmap_get(abi->regs, (void *) reg);
}
-ir_node *be_abi_get_callee_save_irn(be_abi_irg_t *abi, const arch_register_t *reg)
+ir_node *be_abi_get_ignore_irn(be_abi_irg_t *abi, const arch_register_t *reg)
{
- assert(arch_register_type_is(reg, callee_save));
+ assert(arch_register_type_is(reg, ignore));
assert(pmap_contains(abi->regs, (void *) reg));
return pmap_get(abi->regs, (void *) reg);
}
+
+ir_node *be_abi_get_start_barrier(be_abi_irg_t *abi)
+{
+ return abi->start_barrier;
+}
+
+/**
+ * Returns non-zero if the ABI has omitted the frame pointer in
+ * the current graph.
+ */
+int be_abi_omit_fp(const be_abi_irg_t *abi) {
+ return abi->call->flags.bits.try_omit_fp;
+}
projects / libfirm / blobdiff