| ; RUN: opt -S -O1 < %s | FileCheck %s |
| |
| @a = common global i32 0, align 4 |
| |
| ; @hook_me is weak, so GMR must not eliminate the reload of @a in @f, |
| ; even though @hook_me doesn't mod or ref @a. |
| |
| ; Function Attrs: nounwind ssp uwtable |
| define weak i32 @hook_me() { |
| ret i32 0 |
| } |
| |
| ; Function Attrs: nounwind ssp uwtable |
| define i32 @f() { |
| %1 = alloca i32, align 4 |
| store i32 4, i32* @a, align 4 |
| %2 = call i32 @hook_me() |
| ; CHECK: load i32, i32* @a, align 4 |
| %3 = load i32, i32* @a, align 4 |
| %4 = add nsw i32 %3, %2 |
| store i32 %4, i32* @a, align 4 |
| %5 = load i32, i32* %1 |
| ret i32 %5 |
| } |
