; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -passes='default<O2>' -S < %s | FileCheck %s
@a = internal global i32 0, align 4
@c = internal global ptr @b, align 8
@b = internal global ptr null, align 8
@e = internal global ptr @d, align 8
@d = internal global i32 0, align 4

define i32 @main() {
; CHECK-LABEL: @main(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[TMP0:%.*]] = load ptr, ptr @e, align 8
; CHECK-NEXT:    store i32 0, ptr [[TMP0]], align 4
; CHECK-NEXT:    store ptr null, ptr @e, align 8
; CHECK-NEXT:    ret i32 0
;
entry:
  %h = alloca ptr, align 8
  %i = alloca ptr, align 8
  %j = alloca ptr, align 8
  store ptr @a, ptr %h, align 8
  store ptr @a, ptr %j, align 8
  %0 = load ptr, ptr %j, align 8
  store i32 1, ptr %0, align 4
  store ptr @a, ptr %i, align 8
  %1 = load ptr, ptr %i, align 8
  %2 = load ptr, ptr @c, align 8
  store ptr %1, ptr %2, align 8
  %3 = load ptr, ptr %h, align 8
  %call = call ptr @bar(ptr %3)
  ret i32 0
}

define internal ptr @bar(ptr %g) {
entry:
  %g.addr = alloca ptr, align 8
  store ptr %g, ptr %g.addr, align 8
  %0 = load ptr, ptr @e, align 8
  store i32 0, ptr %0, align 4
  %1 = load ptr, ptr %g.addr, align 8
  %2 = load i32, ptr %1, align 4
  %tobool = icmp ne i32 %2, 0
  br i1 %tobool, label %if.end, label %if.then

if.then:                                          ; preds = %entry
  call void @foo()
  br label %if.end

if.end:                                           ; preds = %if.then, %entry
  store ptr null, ptr @e, align 8
  %3 = load ptr, ptr @b, align 8
  ret ptr %3
}

declare void @foo()