File: pr55228.ll

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llvm-toolchain-20 1%3A20.1.8-1
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -S -passes=instcombine < %s | FileCheck %s

; This does not reach a fixpoint, because the global initializer is not in
; folded form. This will not happen if preceded by a GlobalOpt run.

target datalayout = "p:8:8"

@g = external global i8
@c = constant ptr getelementptr inbounds (i8, ptr @g, i64 1)

define i1 @test(ptr %p) "instcombine-no-verify-fixpoint" {
; CHECK-LABEL: @test(
; CHECK-NEXT:    [[CMP:%.*]] = icmp eq ptr [[P:%.*]], getelementptr inbounds (i8, ptr @g, i64 1)
; CHECK-NEXT:    ret i1 [[CMP]]
;
  %alloca = alloca ptr
  call void @llvm.memcpy.p0.p0.i32(ptr %alloca, ptr @c, i32 0, i1 false)
  %load = load ptr, ptr %alloca
  %cmp = icmp eq ptr %p, %load
  ret i1 %cmp
}

declare void @llvm.memcpy.p0.p0.i32(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i32, i1 immarg)