1; RUN: opt -S -O1 -enable-non-lto-gmr=true < %s | FileCheck %s
2
3@a = common global i32 0, align 4
4
5; @hook_me is weak, so GMR must not eliminate the reload of @a in @f,
6; even though @hook_me doesn't mod or ref @a.
7
8; Function Attrs: nounwind ssp uwtable
9define weak i32 @hook_me() {
10  ret i32 0
11}
12
13; Function Attrs: nounwind ssp uwtable
14define i32 @f() {
15  %1 = alloca i32, align 4
16  store i32 4, i32* @a, align 4
17  %2 = call i32 @hook_me()
18  ; CHECK: load i32, i32* @a, align 4
19  %3 = load i32, i32* @a, align 4
20  %4 = add nsw i32 %3, %2
21  store i32 %4, i32* @a, align 4
22  %5 = load i32, i32* %1
23  ret i32 %5
24}
25