[PATCH] D46057: [mips] Fix how compiler fuse instructions to fmadd/fmsub

[Aleksandar Beserminji via Phabricator via llvm-commits]

abeserminji created this revision.
abeserminji added a reviewer: sdardis.
Herald added a subscriber: arichardson.

When no -fp-contract option is provided (default behavior), compiler is fusing fmul and fadd/fsub into fmadd/fmsub.
GCC does not do that, so this patch makes LLVM behave like GCC.

Also, this patch makes LLVM take care of -fp-contract=fast option which enables fusing.


Repository:
  rL LLVM

https://reviews.llvm.org/D46057

Files:
  lib/Target/Mips/MipsISelLowering.cpp
  lib/Target/Mips/MipsISelLowering.h
  lib/Target/Mips/MipsInstrInfo.td
  lib/Target/Mips/MipsMSAInstrInfo.td
  lib/Target/Mips/MipsSEISelLowering.cpp
  test/CodeGen/Mips/fp-contract.ll

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