diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/mesa/drivers/dri/i965/brw_cfg.h | 3 | ||||
| -rw-r--r-- | src/mesa/drivers/dri/i965/brw_fs_dead_code_eliminate.cpp | 21 | ||||
| -rw-r--r-- | src/mesa/drivers/dri/i965/brw_vec4_dead_code_eliminate.cpp | 21 |
3 files changed, 16 insertions, 29 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_cfg.h b/src/mesa/drivers/dri/i965/brw_cfg.h index 69e39e8964d..405020b77e5 100644 --- a/src/mesa/drivers/dri/i965/brw_cfg.h +++ b/src/mesa/drivers/dri/i965/brw_cfg.h @@ -314,6 +314,9 @@ struct cfg_t { #define foreach_block_safe(__block, __cfg) \ foreach_list_typed_safe (bblock_t, __block, link, &(__cfg)->block_list) +#define foreach_block_reverse_safe(__block, __cfg) \ + foreach_list_typed_reverse_safe (bblock_t, __block, link, &(__cfg)->block_list) + #define foreach_inst_in_block(__type, __inst, __block) \ foreach_in_list(__type, __inst, &(__block)->instructions) diff --git a/src/mesa/drivers/dri/i965/brw_fs_dead_code_eliminate.cpp b/src/mesa/drivers/dri/i965/brw_fs_dead_code_eliminate.cpp index 6b4b60224b7..bd57e09fe0c 100644 --- a/src/mesa/drivers/dri/i965/brw_fs_dead_code_eliminate.cpp +++ b/src/mesa/drivers/dri/i965/brw_fs_dead_code_eliminate.cpp @@ -45,13 +45,13 @@ fs_visitor::dead_code_eliminate() BITSET_WORD *live = ralloc_array(NULL, BITSET_WORD, BITSET_WORDS(num_vars)); BITSET_WORD *flag_live = ralloc_array(NULL, BITSET_WORD, 1); - foreach_block (block, cfg) { + foreach_block_reverse_safe(block, cfg) { memcpy(live, live_intervals->block_data[block->num].liveout, sizeof(BITSET_WORD) * BITSET_WORDS(num_vars)); memcpy(flag_live, live_intervals->block_data[block->num].flag_liveout, sizeof(BITSET_WORD)); - foreach_inst_in_block_reverse(fs_inst, inst, block) { + foreach_inst_in_block_reverse_safe(fs_inst, inst, block) { if (inst->dst.file == VGRF && !inst->has_side_effects()) { bool result_live = false; @@ -72,7 +72,6 @@ fs_visitor::dead_code_eliminate() inst->dst = fs_reg(retype(brw_null_reg(), inst->dst.type)); } else { inst->opcode = BRW_OPCODE_NOP; - continue; } } } @@ -81,7 +80,6 @@ fs_visitor::dead_code_eliminate() if (!BITSET_TEST(flag_live, inst->flag_subreg)) { inst->opcode = BRW_OPCODE_NOP; progress = true; - continue; } } @@ -93,7 +91,6 @@ fs_visitor::dead_code_eliminate() !inst->writes_accumulator) { inst->opcode = BRW_OPCODE_NOP; progress = true; - continue; } if (inst->dst.file == VGRF) { @@ -109,9 +106,10 @@ fs_visitor::dead_code_eliminate() BITSET_CLEAR(flag_live, inst->flag_subreg); } - /* Don't mark dead instructions' sources as live */ - if (inst->opcode == BRW_OPCODE_NOP) + if (inst->opcode == BRW_OPCODE_NOP) { + inst->remove(block); continue; + } for (int i = 0; i < inst->sources; i++) { if (inst->src[i].file == VGRF) { @@ -132,15 +130,8 @@ fs_visitor::dead_code_eliminate() ralloc_free(live); ralloc_free(flag_live); - if (progress) { - foreach_block_and_inst_safe (block, backend_instruction, inst, cfg) { - if (inst->opcode == BRW_OPCODE_NOP) { - inst->remove(block); - } - } - + if (progress) invalidate_live_intervals(); - } return progress; } diff --git a/src/mesa/drivers/dri/i965/brw_vec4_dead_code_eliminate.cpp b/src/mesa/drivers/dri/i965/brw_vec4_dead_code_eliminate.cpp index 369941bb71e..2d0722aa1eb 100644 --- a/src/mesa/drivers/dri/i965/brw_vec4_dead_code_eliminate.cpp +++ b/src/mesa/drivers/dri/i965/brw_vec4_dead_code_eliminate.cpp @@ -71,13 +71,13 @@ vec4_visitor::dead_code_eliminate() BITSET_WORD *live = ralloc_array(NULL, BITSET_WORD, BITSET_WORDS(num_vars)); BITSET_WORD *flag_live = ralloc_array(NULL, BITSET_WORD, 1); - foreach_block(block, cfg) { + foreach_block_reverse_safe(block, cfg) { memcpy(live, live_intervals->block_data[block->num].liveout, sizeof(BITSET_WORD) * BITSET_WORDS(num_vars)); memcpy(flag_live, live_intervals->block_data[block->num].flag_liveout, sizeof(BITSET_WORD)); - foreach_inst_in_block_reverse(vec4_instruction, inst, block) { + foreach_inst_in_block_reverse_safe(vec4_instruction, inst, block) { if ((inst->dst.file == VGRF && !inst->has_side_effects()) || (inst->dst.is_null() && inst->writes_flag())){ bool result_live[4] = { false }; @@ -115,7 +115,7 @@ vec4_visitor::dead_code_eliminate() inst->dst = dst_reg(retype(brw_null_reg(), inst->dst.type)); } else { inst->opcode = BRW_OPCODE_NOP; - continue; + break; } } } @@ -130,7 +130,6 @@ vec4_visitor::dead_code_eliminate() if (!combined_live) { inst->opcode = BRW_OPCODE_NOP; progress = true; - continue; } } @@ -150,9 +149,10 @@ vec4_visitor::dead_code_eliminate() BITSET_CLEAR(flag_live, c); } - /* Don't mark dead instructions' sources as live */ - if (inst->opcode == BRW_OPCODE_NOP) + if (inst->opcode == BRW_OPCODE_NOP) { + inst->remove(block); continue; + } for (int i = 0; i < 3; i++) { if (inst->src[i].file == VGRF) { @@ -176,15 +176,8 @@ vec4_visitor::dead_code_eliminate() ralloc_free(live); ralloc_free(flag_live); - if (progress) { - foreach_block_and_inst_safe(block, backend_instruction, inst, cfg) { - if (inst->opcode == BRW_OPCODE_NOP) { - inst->remove(block); - } - } - + if (progress) invalidate_live_intervals(); - } return progress; } |