[llvm-bugs] [Bug 38522] Inefficient code generation for v16i8 vertical less-equal

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=38522

David Bolvansky <david.bolvansky at gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           See Also|                            |https://bugs.llvm.org/show_
                   |                            |bug.cgi?id=42035
                 CC|                            |david.bolvansky at gmail.com

Simon Pilgrim <llvm-dev at redking.me.uk> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
 Fixed By Commit(s)|                            |rG918ccb64b022
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

--- Comment #1 from Simon Pilgrim <llvm-dev at redking.me.uk> ---
Candidate Patch: https://reviews.llvm.org/D76984

--- Comment #2 from Simon Pilgrim <llvm-dev at redking.me.uk> ---
(In reply to Simon Pilgrim from comment #1)
> Candidate Patch: https://reviews.llvm.org/D76984

Fixed in rG918ccb64b022

define zeroext i1 @PR38522(<16 x i8>* %x, <16 x i8>* %y) {
; CHECK-LABEL: PR38522:
; CHECK:       # %bb.0: # %start
; CHECK-NEXT:    vmovdqa (%rdi), %xmm0
; CHECK-NEXT:    vpcmpgtb (%rsi), %xmm0, %xmm0
; CHECK-NEXT:    vptest %xmm0, %xmm0
; CHECK-NEXT:    sete %al
; CHECK-NEXT:    retq
start:
  %0 = load <16 x i8>, <16 x i8>* %x, align 16
  %1 = load <16 x i8>, <16 x i8>* %y, align 16
  %2 = icmp sle <16 x i8> %0, %1
  %3 = sext <16 x i1> %2 to <16 x i8>
  %4 = bitcast <16 x i8> %3 to <2 x i64>
  %5 = tail call i32 @llvm.x86.sse41.ptestc(<2 x i64> %4, <2 x i64> <i64 -1,
i64 -1>)
  %6 = icmp eq i32 %5, 1
  ret i1 %6
}
declare i32 @llvm.x86.sse41.ptestz(<2 x i64>, <2 x i64>) nounwind readnone

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