25 lines
613 B
LLVM
25 lines
613 B
LLVM
; RUN: opt -S -O1 -enable-non-lto-gmr=true < %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
|
|
}
|