[llvm] r225984 - Override the TLI callback enableAggressiveFMAFusion and return true. Indeed, fmul, fmadd and fadd nodes cost the same number of cycles, so we can enable more combining heuristics to produce more fmadd nodes.

[Olivier Sallenave]

Author: ohsallen
Date: Wed Jan 14 08:47:24 2015
New Revision: 225984

URL: http://llvm.org/viewvc/llvm-project?rev=225984&view=rev
Log:
Override the TLI callback enableAggressiveFMAFusion and return true. Indeed, fmul, fmadd and fadd nodes cost the same number of cycles, so we can enable more combining heuristics to produce more fmadd nodes.

Modified:
    llvm/trunk/lib/Target/NVPTX/NVPTXISelLowering.h

Modified: llvm/trunk/lib/Target/NVPTX/NVPTXISelLowering.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/NVPTX/NVPTXISelLowering.h?rev=225984&r1=225983&r2=225984&view=diff
==============================================================================
--- llvm/trunk/lib/Target/NVPTX/NVPTXISelLowering.h (original)
+++ llvm/trunk/lib/Target/NVPTX/NVPTXISelLowering.h Wed Jan 14 08:47:24 2015
@@ -507,6 +507,8 @@ public:
 
   bool isFMAFasterThanFMulAndFAdd(EVT) const override { return true; }
 
+  bool enableAggressiveFMAFusion(EVT VT) const override { return true; }
+
 private:
   const NVPTXSubtarget &nvptxSubtarget; // cache the subtarget here