X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fbe%2Fmips%2Fbearch_mips.c;h=70fa32d78882b0f07fc61b728d1dd75f85f9249a;hb=c1fdf770d4d000dd5cf22daead32369342c5f5d1;hp=c790b6929bbbf34cb2844aef85944c5c5d0f7966;hpb=5c87c3af579d582a642d29d5f1be31c3421d2c65;p=libfirm

diff --git a/ir/be/mips/bearch_mips.c b/ir/be/mips/bearch_mips.c
index c790b6929..70fa32d78 100644
--- a/ir/be/mips/bearch_mips.c
+++ b/ir/be/mips/bearch_mips.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 1995-2007 University of Karlsruhe.  All right reserved.
+ * Copyright (C) 1995-2008 University of Karlsruhe.  All right reserved.
  *
  * This file is part of libFirm.
  *
@@ -23,9 +23,7 @@
  * @author  Matthias Braun, Mehdi
  * @version $Id$
  */
-#ifdef HAVE_CONFIG_H
 #include "config.h"
-#endif
 
 #include "pseudo_irg.h"
 #include "irgwalk.h"
@@ -48,6 +46,8 @@
 #include "../benode_t.h"
 #include "../belower.h"
 #include "../besched_t.h"
+#include "../beblocksched.h"
+#include "../beirg_t.h"
 #include "be.h"
 #include "../beabi.h"
 #include "../bemachine.h"
@@ -88,12 +88,10 @@ static set *cur_reg_set = NULL;
  * will be asked for this information.
  */
 static const
-arch_register_req_t *mips_get_irn_reg_req(const void *self,
-                                          const ir_node *node, int pos)
+arch_register_req_t *mips_get_irn_reg_req(const ir_node *node, int pos)
 {
 	long               node_pos = pos == -1 ? 0 : pos;
 	ir_mode           *mode     = get_irn_mode(node);
-	(void) self;
 
 	if (is_Block(node) || mode == mode_X || mode == mode_M) {
 		return arch_no_register_req;
@@ -134,11 +132,9 @@ arch_register_req_t *mips_get_irn_reg_req(const void *self,
 	return arch_no_register_req;
 }
 
-static void mips_set_irn_reg(const void *self, ir_node *irn,
-                             const arch_register_t *reg)
+static void mips_set_irn_reg(ir_node *irn, const arch_register_t *reg)
 {
 	int pos = 0;
-	(void) self;
 
 	if (is_Proj(irn)) {
 
@@ -161,12 +157,10 @@ static void mips_set_irn_reg(const void *self, ir_node *irn,
 	}
 }
 
-static const arch_register_t *mips_get_irn_reg(const void *self,
-                                               const ir_node *irn)
+static const arch_register_t *mips_get_irn_reg(const ir_node *irn)
 {
 	int pos = 0;
 	const arch_register_t *reg = NULL;
-	(void) self;
 
 	if (is_Proj(irn)) {
 
@@ -190,23 +184,19 @@ static const arch_register_t *mips_get_irn_reg(const void *self,
 	return reg;
 }
 
-static arch_irn_class_t mips_classify(const void *self, const ir_node *irn)
+static arch_irn_class_t mips_classify(const ir_node *irn)
 {
-	(void) self;
 	irn = skip_Proj_const(irn);
 
 	if (is_cfop(irn)) {
 		return arch_irn_class_branch;
-	} else if (is_mips_irn(irn)) {
-		return arch_irn_class_normal;
 	}
 
 	return 0;
 }
 
-static arch_irn_flags_t mips_get_flags(const void *self, const ir_node *irn)
+static arch_irn_flags_t mips_get_flags(const ir_node *irn)
 {
-	(void) self;
 	irn = skip_Proj_const(irn);
 
 	if (!is_mips_irn(irn))
@@ -226,10 +216,9 @@ int mips_is_Store(const ir_node *node)
 	return is_mips_sw(node) || is_mips_sh(node) || is_mips_sb(node);
 }
 
-static ir_entity *mips_get_frame_entity(const void *self, const ir_node *node)
+static ir_entity *mips_get_frame_entity(const ir_node *node)
 {
 	const mips_load_store_attr_t *attr;
-	(void) self;
 
 	if(!is_mips_irn(node))
 		return NULL;
@@ -240,17 +229,15 @@ static ir_entity *mips_get_frame_entity(const void *self, const ir_node *node)
 	return attr->stack_entity;
 }
 
-static void mips_set_frame_entity(const void *self, ir_node *node,
-                                  ir_entity *entity)
+static void mips_set_frame_entity(ir_node *node, ir_entity *entity)
 {
 	mips_load_store_attr_t *attr;
-	(void) self;
 
 	if(!is_mips_irn(node)) {
-		panic("trying to set frame entity on non load/store node %+F\n", node);
+		panic("trying to set frame entity on non load/store node %+F", node);
 	}
 	if(!mips_is_Load(node) && !mips_is_Store(node)) {
-		panic("trying to set frame entity on non load/store node %+F\n", node);
+		panic("trying to set frame entity on non load/store node %+F", node);
 	}
 
 	attr = get_irn_generic_attr(node);
@@ -261,16 +248,15 @@ static void mips_set_frame_entity(const void *self, ir_node *node,
  * This function is called by the generic backend to correct offsets for
  * nodes accessing the stack.
  */
-static void mips_set_frame_offset(const void *self, ir_node *node, int offset)
+static void mips_set_frame_offset(ir_node *node, int offset)
 {
 	mips_load_store_attr_t *attr;
-	(void) self;
 
 	if(!is_mips_irn(node)) {
-		panic("trying to set frame offset on non load/store node %+F\n", node);
+		panic("trying to set frame offset on non load/store node %+F", node);
 	}
 	if(!mips_is_Load(node) && !mips_is_Store(node)) {
-		panic("trying to set frame offset on non load/store node %+F\n", node);
+		panic("trying to set frame offset on non load/store node %+F", node);
 	}
 
 	attr = get_irn_generic_attr(node);
@@ -281,16 +267,15 @@ static void mips_set_frame_offset(const void *self, ir_node *node, int offset)
 	}
 }
 
-static int mips_get_sp_bias(const void *self, const ir_node *irn)
+static int mips_get_sp_bias(const ir_node *irn)
 {
-	(void) self;
 	(void) irn;
 	return 0;
 }
 
 /* fill register allocator interface */
 
-static const arch_irn_ops_if_t mips_irn_ops_if = {
+static const arch_irn_ops_t mips_irn_ops = {
 	mips_get_irn_reg_req,
 	mips_set_irn_reg,
 	mips_get_irn_reg,
@@ -306,13 +291,6 @@ static const arch_irn_ops_if_t mips_irn_ops_if = {
 	NULL,    /* perform_memory_operand  */
 };
 
-mips_irn_ops_t mips_irn_ops = {
-	&mips_irn_ops_if,
-	NULL
-};
-
-
-
 /**************************************************
  *                _                         _  __
  *               | |                       (_)/ _|
@@ -324,174 +302,35 @@ mips_irn_ops_t mips_irn_ops = {
  *                       |___/
  **************************************************/
 
-
-typedef struct {
-	ir_node *start;
-	ir_node *end;
-	unsigned cnt;
-} anchor;
-
-/**
- * Ext-Block walker: create a block schedule
- */
-static void create_block_list(ir_extblk *blk, void *env) {
-	anchor *list = env;
-	int i, n;
-
-	for (i = 0, n = get_extbb_n_blocks(blk); i < n; ++i) {
-		ir_node *block = get_extbb_block(blk, i);
-
-		set_irn_link(block, NULL);
-		if (list->start)
-			set_irn_link(list->end, block);
-		else
-			list->start = block;
-
-		list->end = block;
-		list->cnt += 1;
-	}
-}
-
-/* return the scheduled block at position pos */
-ir_node *mips_get_sched_block(const mips_code_gen_t *cg, int pos) {
-	if (0 <= pos && pos < ARR_LEN(cg->bl_list))
-		return cg->bl_list[pos];
-	return NULL;
-}
-
-/* return the number of scheduled blocks */
-int mips_get_sched_n_blocks(const mips_code_gen_t *cg) {
-	return ARR_LEN(cg->bl_list);
-}
-
-/* set a block schedule number */
-void mips_set_block_sched_nr(ir_node *block, int nr) {
-	set_irn_link(block, INT_TO_PTR(nr));
-}
-
-/* get a block schedule number */
-int mips_get_block_sched_nr(ir_node *block) {
-	return PTR_TO_INT(get_irn_link(block));
-}
-
-/**
- * Creates a block schedule for the given graph.
- */
-static void mips_create_block_sched(mips_code_gen_t *cg) {
-	anchor list;
-	ir_node **bl_list, *block;
-	unsigned i;
-
-	if (cg->bl_list) {
-		DEL_ARR_F(cg->bl_list);
-		free_survive_dce(cg->bl_list_sdce);
-	}
-
-	/* calculate the block schedule here */
-	compute_extbb(cg->irg);
-
-	list.start = NULL;
-	list.end   = NULL;
-	list.cnt   = 0;
-	irg_extblock_walk_graph(cg->irg, NULL, create_block_list, &list);
-
-
-	bl_list = NEW_ARR_F(ir_node *, list.cnt);
-	cg->bl_list_sdce = new_survive_dce();
-	for (i = 0, block = list.start; block; block = get_irn_link(block)) {
-		bl_list[i] = block;
-		survive_dce_register_irn(cg->bl_list_sdce, &bl_list[i]);
-		i++;
-	}
-
-	cg->bl_list = bl_list;
-}
-
-#if 0
-typedef struct _wenv_t {
-	ir_node *list;
-} wenv_t;
-
-/**
- * Walker: link all CopyB nodes
- */
-static void collect_copyb_nodes(ir_node *node, void *env) {
-	wenv_t *wenv = env;
-
-	if (get_irn_op(node) == op_CopyB) {
-		set_irn_link(node, wenv->list);
-		wenv->list = node;
-	}
-}
-#endif
-
-static void replace_copyb_nodes(mips_code_gen_t *cg) {
-#if 0
-	wenv_t env;
-	ir_node *copy, *next;
-	ir_node *old_bl, *new_bl, *jmp, *new_jmp, *mem;
-	const ir_edge_t *edge;
-
-	/* build code for all copyB */
-	env.list = NULL;
-	irg_walk_graph(cg->irg, NULL, collect_copyb_nodes, &env);
-
-	for (copy = env.list; copy; copy = next) {
-		next = get_irn_link(copy);
-
-		old_bl = get_nodes_block(copy);
-		part_block(copy);
-		jmp     = get_Block_cfgpred(old_bl, 0);
-		new_jmp = new_r_Jmp(cg->irg, get_nodes_block(copy));
-
-		new_bl = new_r_Block(cg->irg, 1, &new_jmp);
-		set_nodes_block(jmp, new_bl);
-
-		mem = gen_code_for_CopyB(new_bl, copy);
-
-		/* fix copyB's out edges */
-		foreach_out_edge(copy, edge) {
-			ir_node *succ = get_edge_src_irn(edge);
-
-			assert(is_Proj(succ));
-			switch (get_Proj_proj(succ)) {
-			case pn_CopyB_M_regular:
-			case pn_CopyB_M_except:
-				exchange(succ, mem);
-				break;
-			default:
-				exchange(succ, get_irg_bad(cg->irg));
-			}
-		}
-	}
-#endif
-	(void) cg;
-}
-
 /**
  * Transforms the standard firm graph into
  * a mips firm graph
  */
 static void mips_prepare_graph(void *self) {
 	mips_code_gen_t *cg = self;
-	int bl_nr, n;
 
-	// replace all copyb nodes in the block with a loop
-	// and mips store/load nodes
-	replace_copyb_nodes(cg);
+	/* do local optimizations */
+	optimize_graph_df(cg->irg);
 
-	// Calculate block schedule
-	mips_create_block_sched(cg);
-
-	/* enter the block number into every blocks link field */
-	for (bl_nr = 0, n = mips_get_sched_n_blocks(cg); bl_nr < n; ++bl_nr) {
-		ir_node *bl = mips_get_sched_block(cg, bl_nr);
-		mips_set_block_sched_nr(bl, bl_nr);
-	}
+	/* TODO: we often have dead code reachable through out-edges here. So for
+	 * now we rebuild edges (as we need correct user count for code selection)
+	 */
+#if 1
+	edges_deactivate(cg->irg);
+	edges_activate(cg->irg);
+#endif
 
 	// walk the graph and transform firm nodes into mips nodes where possible
 	mips_transform_graph(cg);
 	dump_ir_block_graph_sched(cg->irg, "-transformed");
+
+	/* do local optimizations (mainly CSE) */
+	optimize_graph_df(cg->irg);
+
+	/* do code placement, to optimize the position of constants */
+	place_code(cg->irg);
+
+	be_dump(cg->irg, "-place", dump_ir_block_graph_sched);
 }
 
 /**
@@ -501,6 +340,10 @@ static void mips_finish_irg(void *self) {
 	mips_code_gen_t *cg = self;
 	ir_graph        *irg = cg->irg;
 
+	/* create block schedule, this also removes empty blocks which might
+	 * produce critical edges */
+   	cg->block_schedule = be_create_block_schedule(irg, cg->birg->exec_freq);
+
 	dump_ir_block_graph_sched(irg, "-mips-finished");
 }
 
@@ -541,10 +384,6 @@ static void mips_emit_and_done(void *self)
 
 	/* de-allocate code generator */
 	del_set(cg->reg_set);
-	if (cg->bl_list) {
-		DEL_ARR_F(cg->bl_list);
-		free_survive_dce(cg->bl_list_sdce);
-	}
 	free(cg);
 }
 
@@ -552,6 +391,7 @@ static void *mips_cg_init(be_irg_t *birg);
 
 static const arch_code_generator_if_t mips_code_gen_if = {
 	mips_cg_init,
+	NULL,                /* get_pic_base */
 	NULL,                /* before abi introduce */
 	mips_prepare_graph,
 	NULL,                /* spill */
@@ -568,21 +408,17 @@ static const arch_code_generator_if_t mips_code_gen_if = {
 static void *mips_cg_init(be_irg_t *birg)
 {
 	const arch_env_t *arch_env = be_get_birg_arch_env(birg);
-	mips_isa_t       *isa      = (mips_isa_t *) arch_env->isa;
-	mips_code_gen_t  *cg       = xmalloc(sizeof(*cg));
+	mips_isa_t       *isa      = (mips_isa_t *) arch_env;
+	mips_code_gen_t  *cg       = XMALLOCZ(mips_code_gen_t);
 
 	cg->impl     = &mips_code_gen_if;
 	cg->irg      = be_get_birg_irg(birg);
 	cg->reg_set  = new_set(mips_cmp_irn_reg_assoc, 1024);
-	cg->arch_env = arch_env;
 	cg->isa      = isa;
 	cg->birg     = birg;
-	cg->bl_list  = NULL;
 
 	cur_reg_set = cg->reg_set;
 
-	mips_irn_ops.cg = cg;
-
 	isa->cg = cg;
 
 	return (arch_code_generator_t *)cg;
@@ -605,6 +441,7 @@ static mips_isa_t mips_isa_template = {
 		&mips_gp_regs[REG_SP],
 		&mips_gp_regs[REG_FP],
 		-1,		/* stack direction */
+		2,      /* power of two stack alignment for calls, 2^2 == 4 */
 		NULL,	/* main environment */
 		7,      /* spill costs */
 		5,      /* reload costs */
@@ -615,7 +452,7 @@ static mips_isa_t mips_isa_template = {
 /**
  * Initializes the backend ISA and opens the output file.
  */
-static void *mips_init(FILE *file_handle) {
+static arch_env_t *mips_init(FILE *file_handle) {
 	static int inited = 0;
 	mips_isa_t *isa;
 
@@ -623,13 +460,13 @@ static void *mips_init(FILE *file_handle) {
 		return NULL;
 	inited = 1;
 
-	isa = xcalloc(1, sizeof(isa[0]));
+	isa = XMALLOC(mips_isa_t);
 	memcpy(isa, &mips_isa_template, sizeof(isa[0]));
 
 	be_emit_init(file_handle);
 
 	mips_register_init();
-	mips_create_opcodes();
+	mips_create_opcodes(&mips_irn_ops);
 	// mips_init_opcode_transforms();
 
 	/* we mark referenced global entities, so we can only emit those which
@@ -638,7 +475,7 @@ static void *mips_init(FILE *file_handle) {
 	 */
 	inc_master_type_visited();
 
-	return isa;
+	return &isa->arch_env;
 }
 
 /**
@@ -648,7 +485,7 @@ static void mips_done(void *self)
 {
 	mips_isa_t *isa = self;
 
-	be_gas_emit_decls(isa->arch_isa.main_env, 1);
+	be_gas_emit_decls(isa->arch_env.main_env, 1);
 
 	be_emit_exit();
 	free(isa);
@@ -687,7 +524,6 @@ const arch_register_class_t *mips_get_reg_class_for_mode(const void *self,
 
 typedef struct {
 	be_abi_call_flags_bits_t flags;
-	const arch_isa_t *isa;
 	const arch_env_t *arch_env;
 	ir_graph *irg;
 	// do special handling to support debuggers
@@ -696,12 +532,11 @@ typedef struct {
 
 static void *mips_abi_init(const be_abi_call_t *call, const arch_env_t *arch_env, ir_graph *irg)
 {
-	mips_abi_env_t *env    = xmalloc(sizeof(env[0]));
+	mips_abi_env_t *env    = XMALLOC(mips_abi_env_t);
 	be_abi_call_flags_t fl = be_abi_call_get_flags(call);
 	env->flags             = fl.bits;
 	env->irg               = irg;
 	env->arch_env          = arch_env;
-	env->isa               = arch_env->isa;
 	env->debug             = 1;
 	return env;
 }
@@ -711,10 +546,10 @@ static void mips_abi_dont_save_regs(void *self, pset *s)
 	mips_abi_env_t *env = self;
 
 	if(env->flags.try_omit_fp)
-		pset_insert_ptr(s, env->isa->bp);
+		pset_insert_ptr(s, env->arch_env->bp);
 }
 
-static const arch_register_t *mips_abi_prologue(void *self, ir_node** mem, pmap *reg_map)
+static const arch_register_t *mips_abi_prologue(void *self, ir_node** mem, pmap *reg_map, int *stack_bias)
 {
 	mips_abi_env_t *env = self;
 	ir_graph *irg = env->irg;
@@ -723,7 +558,9 @@ static const arch_register_t *mips_abi_prologue(void *self, ir_node** mem, pmap
 	ir_node *fp = be_abi_reg_map_get(reg_map, &mips_gp_regs[REG_FP]);
 	int initialstackframesize;
 
-	if(env->debug) {
+	(void) stack_bias;
+
+	if (env->debug) {
 		/*
 		 * The calling conventions wants a stack frame of at least 24bytes size with
 		 *   a0-a3 saved in offset 0-12
@@ -737,7 +574,7 @@ static const arch_register_t *mips_abi_prologue(void *self, ir_node** mem, pmap
 		// - setup first part of stackframe
 		sp = new_rd_mips_addu(NULL, irg, block, sp,
 		                      mips_create_Immediate(initialstackframesize));
-		mips_set_irn_reg(NULL, sp, &mips_gp_regs[REG_SP]);
+		mips_set_irn_reg(sp, &mips_gp_regs[REG_SP]);
 		set_mips_flags(sp, arch_irn_flags_ignore);
 
 		/* TODO: where to get an edge with a0-a3
@@ -775,7 +612,7 @@ static const arch_register_t *mips_abi_prologue(void *self, ir_node** mem, pmap
 		// save old framepointer
 		sp = new_rd_mips_addu(NULL, irg, block, sp,
 		                      mips_create_Immediate(-initialstackframesize));
-		mips_set_irn_reg(NULL, sp, &mips_gp_regs[REG_SP]);
+		mips_set_irn_reg(sp, &mips_gp_regs[REG_SP]);
 		set_mips_flags(sp, arch_irn_flags_ignore);
 
 		reg = be_abi_reg_map_get(reg_map, &mips_gp_regs[REG_FP]);
@@ -787,7 +624,7 @@ static const arch_register_t *mips_abi_prologue(void *self, ir_node** mem, pmap
 	// setup framepointer
 	fp = new_rd_mips_addu(NULL, irg, block, sp,
 	                      mips_create_Immediate(-initialstackframesize));
-	mips_set_irn_reg(NULL, fp, &mips_gp_regs[REG_FP]);
+	mips_set_irn_reg(fp, &mips_gp_regs[REG_FP]);
 	set_mips_flags(fp, arch_irn_flags_ignore);
 
 	be_abi_reg_map_set(reg_map, &mips_gp_regs[REG_FP], fp);
@@ -809,7 +646,7 @@ static void mips_abi_epilogue(void *self, ir_node *block, ir_node **mem, pmap *r
 
 	// copy fp to sp
 	sp = new_rd_mips_or(NULL, irg, block, fp, mips_create_zero());
-	mips_set_irn_reg(NULL, sp, &mips_gp_regs[REG_SP]);
+	mips_set_irn_reg(sp, &mips_gp_regs[REG_SP]);
 	set_mips_flags(sp, arch_irn_flags_ignore);
 
 	// 1. restore fp
@@ -819,7 +656,7 @@ static void mips_abi_epilogue(void *self, ir_node *block, ir_node **mem, pmap *r
 
 	fp = new_r_Proj(irg, block, load, mode_Iu, pn_mips_lw_res);
 	*mem = new_r_Proj(irg, block, load, mode_Iu, pn_mips_lw_M);
-	arch_set_irn_register(env->arch_env, fp, &mips_gp_regs[REG_FP]);
+	arch_set_irn_register(fp, &mips_gp_regs[REG_FP]);
 
 	be_abi_reg_map_set(reg_map, &mips_gp_regs[REG_FP], fp);
 	be_abi_reg_map_set(reg_map, &mips_gp_regs[REG_SP], sp);
@@ -945,24 +782,6 @@ static void mips_get_call_abi(const void *self, ir_type *method_type,
 	}
 }
 
-static const void *mips_get_irn_ops(const arch_irn_handler_t *self,
-                                    const ir_node *irn)
-{
-	(void) self;
-	(void) irn;
-	return &mips_irn_ops;
-}
-
-const arch_irn_handler_t mips_irn_handler = {
-	mips_get_irn_ops
-};
-
-const arch_irn_handler_t *mips_get_irn_handler(const void *self)
-{
-	(void) self;
-	return &mips_irn_handler;
-}
-
 /**
  * Initializes the code generator interface.
  */
@@ -989,16 +808,14 @@ static const be_execution_unit_t ***mips_get_allowed_execution_units(
 	(void) self;
 	(void) irn;
 	/* TODO */
-	assert(0);
-	return NULL;
+	panic("Unimplemented mips_get_allowed_execution_units()");
 }
 
 static const be_machine_t *mips_get_machine(const void *self)
 {
 	(void) self;
 	/* TODO */
-	assert(0);
-	return NULL;
+	panic("Unimplemented mips_get_machine()");
 }
 
 /**
@@ -1018,16 +835,33 @@ static const backend_params *mips_get_libfirm_params(void) {
 	static backend_params p = {
 		1,     /* need dword lowering */
 		0,     /* don't support inline assembler yet */
+		0,     /* no immediate floating point mode. */
 		NULL,  /* no additional opcodes */
 		NULL,  /* will be set later */
 		NULL,  /* but yet no creator function */
 		NULL,  /* context for create_intrinsic_fkt */
 		NULL,  /* no if conversion settings */
+		NULL   /* no immediate fp mode */
 	};
 
 	return &p;
 }
 
+static asm_constraint_flags_t mips_parse_asm_constraint(const void *self,
+                                                        const char **c)
+{
+	(void) self;
+	(void) c;
+	return ASM_CONSTRAINT_FLAG_INVALID;
+}
+
+static int mips_is_valid_clobber(const void *self, const char *clobber)
+{
+	(void) self;
+	(void) clobber;
+	return 0;
+}
+
 const arch_isa_if_t mips_isa_if = {
 	mips_init,
 	mips_done,
@@ -1035,7 +869,6 @@ const arch_isa_if_t mips_isa_if = {
 	mips_get_reg_class,
 	mips_get_reg_class_for_mode,
 	mips_get_call_abi,
-	mips_get_irn_handler,
 	mips_get_code_generator_if,
 	mips_get_list_sched_selector,
 	mips_get_ilp_sched_selector,
@@ -1044,6 +877,9 @@ const arch_isa_if_t mips_isa_if = {
 	mips_get_allowed_execution_units,
 	mips_get_machine,
 	mips_get_irg_list,
+	NULL,                /* mark remat */
+	mips_parse_asm_constraint,
+	mips_is_valid_clobber
 };
 
 void be_init_arch_mips(void)