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nv50/ir/opt: swap VP inputs to first source where possible

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This commit is contained in:
Christoph Bumiller 2012-04-18 17:00:52 +02:00
parent 97e2f625b8
commit 90b5301cea
1 changed files with 17 additions and 0 deletions
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17
src/gallium/drivers/nv50/codegen/nv50_ir_peephole.cpp
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@ -123,6 +123,7 @@ private:
bool isCSpaceLoad(Instruction *);
bool isImmd32Load(Instruction *);
bool isAttribOrSharedLoad(Instruction *);
};
bool
@ -139,6 +140,16 @@ LoadPropagation::isImmd32Load(Instruction *ld)
return ld->src(0).getFile() == FILE_IMMEDIATE;
}
bool
LoadPropagation::isAttribOrSharedLoad(Instruction *ld)
{
return ld &&
(ld->op == OP_VFETCH ||
(ld->op == OP_LOAD &&
(ld->src(0).getFile() == FILE_SHADER_INPUT ||
ld->src(0).getFile() == FILE_MEMORY_SHARED)));
}
void
LoadPropagation::checkSwapSrc01(Instruction *insn)
{
@ -162,6 +173,12 @@ LoadPropagation::checkSwapSrc01(Instruction *insn)
insn->swapSources(0, 1);
else
return;
} else
if (isAttribOrSharedLoad(i1)) {
if (!isAttribOrSharedLoad(i0))
insn->swapSources(0, 1);
else
return;
} else {
return;
}