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Fixed logic to enable complex FMA formation. 

llvm-svn: 235508
This commit is contained in:
Olivier Sallenave 2015-04-22 14:07:26 +00:00
parent 1d67713b44
commit c587bee405
1 changed files with 2 additions and 2 deletions
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4
llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
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@ -7164,7 +7164,7 @@ SDValue DAGCombiner::visitFADDForFMACombine(SDNode *N) {
N0));
}
if (LookThroughFPExt) {
if (UnsafeFPMath && LookThroughFPExt) {
// fold (fadd (fma x, y, (fpext (fmul u, v))), z)
// -> (fma x, y, (fma (fpext u), (fpext v), z))
auto FoldFAddFMAFPExtFMul = [&] (
@ -7415,7 +7415,7 @@ SDValue DAGCombiner::visitFSUBForFMACombine(SDNode *N) {
N21, N0));
}
if (LookThroughFPExt) {
if (UnsafeFPMath && LookThroughFPExt) {
// fold (fsub (fma x, y, (fpext (fmul u, v))), z)
// -> (fma x, y (fma (fpext u), (fpext v), (fneg z)))
if (N0.getOpcode() == PreferredFusedOpcode) {