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| author | Christian Konig <christian.koenig@amd.com> | 2013-02-26 17:52:36 +0000 |
|---|---|---|
| committer | Christian Konig <christian.koenig@amd.com> | 2013-02-26 17:52:36 +0000 |
| commit | 6612ac39c98edc5fb24b7f4b12f4e92a9e02b626 (patch) | |
| tree | 655bab8f6f701b6260431f8a914b90169322fa5d /llvm/lib | |
| parent | 76edd4f2bc422313869cfbdc14dc1c288ef44b0f (diff) | |
| download | bcm5719-llvm-6612ac39c98edc5fb24b7f4b12f4e92a9e02b626.tar.gz bcm5719-llvm-6612ac39c98edc5fb24b7f4b12f4e92a9e02b626.zip | |
R600/SI: swap operands if it helps folding
Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Tom Stellard <thomas.stellard@amd.com>
llvm-svn: 176103
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/Target/R600/SIISelLowering.cpp | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/llvm/lib/Target/R600/SIISelLowering.cpp b/llvm/lib/Target/R600/SIISelLowering.cpp index bf1f3bf750d..da30c078c74 100644 --- a/llvm/lib/Target/R600/SIISelLowering.cpp +++ b/llvm/lib/Target/R600/SIISelLowering.cpp @@ -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)) { |
