File: pr51333.ll

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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -S -passes='early-cse<memssa>,loop-mssa(licm)' < %s | FileCheck %s

; This used to assert because was have a MemoryDef for what turns out to be
; a readnone call after EarlyCSE.

@fn_ptr = external global ptr, align 1

define void @test() {
; CHECK-LABEL: @test(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br label [[DO_BODY:%.*]]
; CHECK:       do.body:
; CHECK-NEXT:    store ptr @readnone_fn, ptr @fn_ptr, align 8
; CHECK-NEXT:    call void @readnone_fn()
; CHECK-NEXT:    call void @foo()
; CHECK-NEXT:    br label [[DO_BODY]]
;
entry:
  br label %do.body

do.body:
  store ptr @readnone_fn, ptr @fn_ptr
  %fn = load ptr, ptr @fn_ptr
  call void %fn()
  call void @foo()
  br label %do.body
}

declare void @foo()
declare void @readnone_fn() readnone