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R600/SI: swap operands if it helps folding

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Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Tom Stellard <thomas.stellard@amd.com>

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176103 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Christian Konig 2013-02-26 17:52:36 +00:00
parent b3d1eaded7
commit b37afdcf3f
1 changed files with 15 additions and 1 deletions
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16
lib/Target/R600/SIISelLowering.cpp
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@ -545,8 +545,22 @@ SDNode *SITargetLowering::PostISelFolding(MachineSDNode *Node,
// Is this a VSrc or SSrc operand ?
unsigned RegClass = Desc->OpInfo[Op].RegClass;
if (!isVSrc(RegClass) && !isSSrc(RegClass))
if (!isVSrc(RegClass) && !isSSrc(RegClass)) {
if (i == 1 && Desc->isCommutable() &&
fitsRegClass(DAG, Ops[0], RegClass) &&
foldImm(Ops[1], Immediate, ScalarSlotUsed)) {
assert(isVSrc(Desc->OpInfo[NumDefs].RegClass) ||
isSSrc(Desc->OpInfo[NumDefs].RegClass));
// Swap commutable operands
SDValue Tmp = Ops[1];
Ops[1] = Ops[0];
Ops[0] = Tmp;
}
continue;
}
// Try to fold the immediates
if (!foldImm(Ops[i], Immediate, ScalarSlotUsed)) {