[PATCH] D16596: AVX512: store mask patterns.

[Igor Breger via llvm-commits]

igorb created this revision.
igorb added a reviewer: delena.
igorb added a subscriber: llvm-commits.
igorb set the repository for this revision to rL LLVM.

AVX512: Add store mask patterns.

original bug:

bash-4.1$ cat t.c
void f2(int);
void f1(int c)
{
  static int v = 0;
  if (v == 0)
    v = 1;
  else
    v = 0;
  f2(v);
}
bash-4.1$ clang -O2 -S -march=skylake t.c
fatal error: error in backend: Cannot select: t9: ch = store<ST1[@f1.v]> t18:1,
      t8, t23, undef:i64
  t8: i1 = xor t21, Constant:i1<-1>
    t21: i1 = truncate t18
      t18: i32,ch = load<LD1[@f1.v], zext from i1> t0, t23, undef:i64
        t23: i64 = X86ISD::Wrapper TargetGlobalAddress:i64<i1* @f1.v> 0
          t22: i64 = TargetGlobalAddress<i1* @f1.v> 0
        t5: i64 = undef
    t7: i1 = Constant<-1>
  t23: i64 = X86ISD::Wrapper TargetGlobalAddress:i64<i1* @f1.v> 0
    t22: i64 = TargetGlobalAddress<i1* @f1.v> 0
  t5: i64 = undef
In function: f1


Repository:
  rL LLVM

http://reviews.llvm.org/D16596

Files:
  lib/Target/X86/X86ISelLowering.cpp
  lib/Target/X86/X86InstrAVX512.td
  test/CodeGen/X86/avx512-mask-op.ll

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