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i965: Don't mark dead instructions' sources live.

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Removes dead code from glsl-mat-from-int-ctor-03.shader_test.

Reported-by: Juan A. Suarez Romero <jasuarez@igalia.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
This commit is contained in:
Matt Turner 2015-11-25 16:19:06 -08:00
parent 0e49151dcf
commit 48b4e88d3d
2 changed files with 8 additions and 0 deletions
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4
src/mesa/drivers/dri/i965/brw_fs_dead_code_eliminate.cpp
View file

@ -109,6 +109,10 @@ 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)
continue;
for (int i = 0; i < inst->sources; i++) {
if (inst->src[i].file == VGRF) {
int var = live_intervals->var_from_reg(inst->src[i]);

4
src/mesa/drivers/dri/i965/brw_vec4_dead_code_eliminate.cpp
View file

@ -150,6 +150,10 @@ vec4_visitor::dead_code_eliminate()
BITSET_CLEAR(flag_live, c);
}
/* Don't mark dead instructions' sources as live */
if (inst->opcode == BRW_OPCODE_NOP)
continue;
for (int i = 0; i < 3; i++) {
if (inst->src[i].file == VGRF) {
for (unsigned j = 0; j < inst->regs_read(i); j++) {