* @file
* @brief Manage addressing into the stackframe
* @author Matthias Braun
- * @version $Id$
*/
#include "config.h"
#include "sparc_new_nodes.h"
#include "sparc_cconv.h"
#include "bitfiddle.h"
-#include "../bearch.h"
-#include "../benode.h"
-#include "../besched.h"
+#include "bearch.h"
+#include "benode.h"
+#include "besched.h"
static void set_irn_sp_bias(ir_node *node, int new_bias)
{
static void process_bias(ir_node *block, bool sp_relative, int bias,
int free_bytes)
{
- const ir_edge_t *edge;
- ir_node *irn;
-
mark_Block_block_visited(block);
/* process schedule */
if (entity != NULL) {
int offset = get_entity_offset(entity);
if (sp_relative)
- offset += bias;
+ offset += bias + SPARC_MIN_STACKSIZE;
arch_set_frame_offset(irn, offset);
}
+ /* The additional alignment bytes cannot be used
+ * anymore after alloca. */
+ if (is_sparc_SubSP(irn)) {
+ free_bytes = 0;
+ } else if (is_sparc_AddSP(irn)) {
+ assert(free_bytes == 0);
+ }
+
irn_bias = arch_get_sp_bias(irn);
if (irn_bias == 0) {
/* do nothing */
}
}
+/**
+ * Perform some fixups for variadic functions.
+ * To make the rest of the frontend code easier to understand we add
+ * "dummy" parameters until the number of parameters transmitted in registers.
+ * (because otherwise the backend wouldn't store the value of the register
+ * parameters into memory for the VLA magic)
+ */
bool sparc_variadic_fixups(ir_graph *irg, calling_convention_t *cconv)
{
ir_entity *entity = get_irg_entity(irg);
set_method_variadicity(new_mtp, get_method_variadicity(mtp));
set_method_calling_convention(new_mtp, get_method_calling_convention(mtp));
set_method_additional_properties(new_mtp, get_method_additional_properties(mtp));
- set_lowered_type(mtp, new_mtp);
+ set_higher_type(new_mtp, mtp);
set_entity_type(entity, new_mtp);
}
if (param->reg0 != NULL) {
/* use reserved spill space on between type */
if (entity != NULL) {
- long offset = SPARC_PARAMS_SPILL_OFFSET + i*4;
+ long offset = SPARC_PARAMS_SPILL_OFFSET + i * SPARC_REGISTER_SIZE;
assert(i < SPARC_N_PARAM_REGS);
set_entity_owner(entity, between_type);
set_entity_offset(entity, offset);
if (va_start_entity != NULL) {
/* sparc_variadic_fixups() fiddled with our type, find out the
* original number of parameters */
- ir_type *non_lowered = get_associated_type(mtp);
+ ir_type *non_lowered = get_higher_type(mtp);
size_t orig_n_params = get_method_n_params(non_lowered);
long offset;
assert(get_method_variadicity(mtp) == variadicity_variadic);
memset(layout, 0, sizeof(*layout));
between_type = new_type_class(new_id_from_str("sparc_between_type"));
- set_type_size_bytes(between_type, SPARC_MIN_STACKSIZE);
+ if (cconv->omit_fp) {
+ set_type_size_bytes(between_type, 0);
+ } else {
+ set_type_size_bytes(between_type, SPARC_MIN_STACKSIZE);
+ }
layout->frame_type = get_irg_frame_type(irg);
layout->between_type = between_type;
/* Assign entity offsets, to all stack-related entities.
* The offsets are relative to the begin of the stack frame.
*/
-static void process_frame_types(ir_graph *irg)
+void sparc_adjust_stack_entity_offsets(ir_graph *irg)
{
be_stack_layout_t *layout = be_get_irg_stack_layout(irg);
ir_type *between_type = layout->between_type;
unsigned between_size = get_type_size_bytes(between_type);
- ir_type *frame_type = get_irg_frame_type(irg);
- unsigned frame_size = get_type_size_bytes(frame_type);
+ ir_type *frame_type = get_irg_frame_type(irg);
+ unsigned frame_size = get_type_size_bytes(frame_type);
+ unsigned frame_align = get_type_alignment_bytes(frame_type);
+
+ /* There's the tricky case of the stackframe size not being a multiple
+ * of the alignment. There are 2 variants:
+ *
+ * - frame-pointer relative addressing:
+ * Increase frame_size in case it is not a multiple of the alignment as we
+ * address entities from the "top" with negative offsets
+ * - stack-pointer relative addressing:
+ * Stackframesize + SPARC_MIN_STACK_SIZE has to be aligned. Increase
+ * frame_size accordingly.
+ */
+ if (!layout->sp_relative) {
+ frame_size = (frame_size + frame_align-1) & ~(frame_align-1);
+ } else {
+ unsigned misalign = (SPARC_MIN_STACKSIZE+frame_size) % frame_align;
+ frame_size += misalign;
+ }
+ set_type_size_bytes(frame_type, frame_size);
ir_type *arg_type = layout->arg_type;
void sparc_fix_stack_bias(ir_graph *irg)
{
- ir_node *start_block = get_irg_start_block(irg);
+ bool sp_relative = be_get_irg_stack_layout(irg)->sp_relative;
- process_frame_types(irg);
+ ir_node *start_block = get_irg_start_block(irg);
ir_reserve_resources(irg, IR_RESOURCE_BLOCK_VISITED);
inc_irg_block_visited(irg);
- process_bias(start_block, be_get_irg_stack_layout(irg)->sp_relative, 0, 0);
+ process_bias(start_block, sp_relative, 0, 0);
ir_free_resources(irg, IR_RESOURCE_BLOCK_VISITED);
}
projects / libfirm / blobdiff