[all-commits] [llvm/llvm-project] b1e68f: [SelectionDAGBuilder] Pass fast math flags to getN...

[topperc via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: b1e68f885b550cf006f5d84b43aa3a0b2905d4b3
      https://github.com/llvm/llvm-project/commit/b1e68f885b550cf006f5d84b43aa3a0b2905d4b3
  Author: Craig Topper <craig.topper at intel.com>
  Date:   2020-09-08 (Tue, 08 Sep 2020)

  Changed paths:
    M llvm/include/llvm/CodeGen/SelectionDAG.h
    M llvm/include/llvm/CodeGen/SelectionDAGNodes.h
    M llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
    M llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
    M llvm/lib/CodeGen/SelectionDAG/LegalizeFloatTypes.cpp
    M llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
    M llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.h
    M llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp
    M llvm/lib/Target/PowerPC/PPCISelLowering.cpp
    M llvm/lib/Target/X86/X86ISelLowering.cpp
    M llvm/test/CodeGen/AArch64/fp-const-fold.ll
    M llvm/test/CodeGen/PowerPC/fmf-propagation.ll
    M llvm/test/CodeGen/SystemZ/fp-mul-14.ll
    M llvm/test/CodeGen/Thumb2/mve-vecreduce-fadd.ll
    M llvm/test/CodeGen/X86/fp-undef.ll

  Log Message:
  -----------
  [SelectionDAGBuilder] Pass fast math flags to getNode calls rather than trying to set them after the fact.:

This removes the after the fact FMF handling from D46854 in favor of passing fast math flags to getNode. This should be a superset of D87130.

This required adding a SDNodeFlags to SelectionDAG::getSetCC.

Now we manage to contant fold some stuff undefs during the
initial getNode that we don't do in later DAG combines.

Differential Revision: https://reviews.llvm.org/D87200