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i965/fs: Split out is_coalesce_candidate() function.

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Reviewed-by: Anuj Phogat <anuj.phogat@gmail.com>
This commit is contained in:
Matt Turner 2014-03-27 09:40:58 -07:00
parent 0fbcdec2f6
commit 29841fbe20
1 changed files with 23 additions and 14 deletions
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37
src/mesa/drivers/dri/i965/brw_fs_register_coalesce.cpp
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@ -43,6 +43,28 @@
#include "brw_fs.h"
#include "brw_fs_live_variables.h"
static bool
is_coalesce_candidate(const fs_inst *inst, const int *virtual_grf_sizes)
{
if (inst->opcode != BRW_OPCODE_MOV ||
inst->is_partial_write() ||
inst->saturate ||
inst->src[0].file != GRF ||
inst->src[0].negate ||
inst->src[0].abs ||
!inst->src[0].is_contiguous() ||
inst->dst.file != GRF ||
inst->dst.type != inst->src[0].type) {
return false;
}
if (virtual_grf_sizes[inst->src[0].reg] >
virtual_grf_sizes[inst->dst.reg])
return false;
return true;
}
bool
fs_visitor::register_coalesce()
{
@ -59,20 +81,7 @@ fs_visitor::register_coalesce()
foreach_list(node, &this->instructions) {
fs_inst *inst = (fs_inst *)node;
if (inst->opcode != BRW_OPCODE_MOV ||
inst->is_partial_write() ||
inst->saturate ||
inst->src[0].file != GRF ||
inst->src[0].negate ||
inst->src[0].abs ||
!inst->src[0].is_contiguous() ||
inst->dst.file != GRF ||
inst->dst.type != inst->src[0].type) {
continue;
}
if (virtual_grf_sizes[inst->src[0].reg] >
virtual_grf_sizes[inst->dst.reg])
if (!is_coalesce_candidate(inst, virtual_grf_sizes))
continue;
int var_from = live_intervals->var_from_reg(&inst->src[0]);