diff options
| 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 | b37afdcf3fa41596ab1f70eef915a8ade68ccc24 (patch) | |
| tree | d5a61a259ee5073e3c5d46a1236ccb0b51981a65 /lib/Target | |
| parent | b3d1eaded7d7a874bbda2b0d322df7389c724bfc (diff) | |
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>
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176103 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target')
| -rw-r--r-- | lib/Target/R600/SIISelLowering.cpp | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/lib/Target/R600/SIISelLowering.cpp b/lib/Target/R600/SIISelLowering.cpp index bf1f3bf750..da30c078c7 100644 --- a/lib/Target/R600/SIISelLowering.cpp +++ b/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)) { |