[llvm] r235508 - Fixed logic to enable complex FMA formation.

[Olivier Sallenave]

Author: ohsallen
Date: Wed Apr 22 09:07:26 2015
New Revision: 235508

URL: http://llvm.org/viewvc/llvm-project?rev=235508&view=rev
Log:
Fixed logic to enable complex FMA formation.

Modified:
    llvm/trunk/lib/CodeGen/SelectionDAG/DAGCombiner.cpp

Modified: llvm/trunk/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/SelectionDAG/DAGCombiner.cpp?rev=235508&r1=235507&r2=235508&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/SelectionDAG/DAGCombiner.cpp (original)
+++ llvm/trunk/lib/CodeGen/SelectionDAG/DAGCombiner.cpp Wed Apr 22 09:07:26 2015
@@ -7164,7 +7164,7 @@ SDValue DAGCombiner::visitFADDForFMAComb
                                      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::visitFSUBForFMAComb
                                      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) {