; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 6
; RUN: opt < %s -passes=gvn,instcombine -S | FileCheck %s

; PR4189
@G = external constant [4 x i32]

define i32 @test(ptr %p, i32 %i) nounwind {
; CHECK-LABEL: define i32 @test(
; CHECK-SAME: ptr [[P:%.*]], i32 [[I:%.*]]) #[[ATTR0:[0-9]+]] {
; CHECK-NEXT:  [[ENTRY:.*:]]
; CHECK-NEXT:    store i8 4, ptr [[P]], align 1
; CHECK-NEXT:    ret i32 0
;
entry:
  %P = getelementptr [4 x i32], ptr @G, i32 0, i32 %i
  %A = load i32, ptr %P
  store i8 4, ptr %p
  %B = load i32, ptr %P
  %C = sub i32 %A, %B
  ret i32 %C
}