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i965/fs: Refactor check for potential copy propagated instructions.

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Reviewed-by: Matt Turner <mattst88@gmail.com>
Signed-off-by: Abdiel Janulgue <abdiel.janulgue@linux.intel.com>
This commit is contained in:
Abdiel Janulgue
2014-06-05 11:05:28 -07:00
committed by Matt Turner
parent 1e150ca696
commit a66660d2b7
1 changed files with 17 additions and 10 deletions
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src/mesa/drivers/dri/i965/brw_fs_copy_propagation.cpp
+17 -10
View File
@@ -478,6 +478,22 @@ fs_visitor::try_constant_propagate(fs_inst *inst, acp_entry *entry)
return progress;
}
static bool
can_propagate_from(fs_inst *inst)
{
return (inst->opcode == BRW_OPCODE_MOV &&
inst->dst.file == GRF &&
((inst->src[0].file == GRF &&
(inst->src[0].reg != inst->dst.reg ||
inst->src[0].reg_offset != inst->dst.reg_offset)) ||
inst->src[0].file == UNIFORM ||
inst->src[0].file == IMM) &&
inst->src[0].type == inst->dst.type &&
!inst->saturate &&
!inst->is_partial_write());
}
/* Walks a basic block and does copy propagation on it using the acp
* list.
*/
@@ -532,16 +548,7 @@ fs_visitor::opt_copy_propagate_local(void *copy_prop_ctx, bblock_t *block,
/* If this instruction's source could potentially be folded into the
* operand of another instruction, add it to the ACP.
*/
if (inst->opcode == BRW_OPCODE_MOV &&
inst->dst.file == GRF &&
((inst->src[0].file == GRF &&
(inst->src[0].reg != inst->dst.reg ||
inst->src[0].reg_offset != inst->dst.reg_offset)) ||
inst->src[0].file == UNIFORM ||
inst->src[0].file == IMM) &&
inst->src[0].type == inst->dst.type &&
!inst->saturate &&
!inst->is_partial_write()) {
if (can_propagate_from(inst)) {
acp_entry *entry = ralloc(copy_prop_ctx, acp_entry);
entry->dst = inst->dst;
entry->src = inst->src[0];