File: pr51175.ll

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llvm-toolchain-14 1%3A14.0.6-12
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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -mtriple=x86_64-unknown-linux-gnu | FileCheck %s

; The and with -9 has multiple users which prevents
; SimplifyDemandedBits from touching it. The truncate only
; demands the lower 8 bits. X86ISelDAGToDAG.cpp wants form
; a test instruction from the icmp+trunc+and, but needs to
; mask the -9 to 8 bits since SimplifyDemandedBits didn't.

define i32 @foo(i16 signext %0, i32 %1, i32* nocapture %2) {
; CHECK-LABEL: foo:
; CHECK:       # %bb.0:
; CHECK-NEXT:    incl %edi
; CHECK-NEXT:    movl %edi, %eax
; CHECK-NEXT:    andl $65527, %eax # imm = 0xFFF7
; CHECK-NEXT:    movl %eax, (%rdx)
; CHECK-NEXT:    xorl %eax, %eax
; CHECK-NEXT:    testb $-9, %dil
; CHECK-NEXT:    cmovel %esi, %eax
; CHECK-NEXT:    retq
  %4 = add i16 %0, 1
  %5 = and i16 %4, -9
  %6 = zext i16 %5 to i32
  store i32 %6, i32* %2, align 4
  %7 = trunc i16 %5 to i8
  %8 = icmp eq i8 %7, 0
  %9 = select i1 %8, i32 %1, i32 0
  ret i32 %9
}