blob: 6917b02e032423d2c791db9ed702dbb358ab67ae (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
|
; RUN: opt -S -basicaa -objc-arc -gvn < %s | FileCheck %s
@x = common global i8* null, align 8
declare i8* @objc_retain(i8*)
; GVN should be able to eliminate this redundant load, with ARC-specific
; alias analysis.
; CHECK: @foo
; CHECK-NEXT: entry:
; CHECK-NEXT: %s = load i8** @x
; CHECK-NOT: load
; CHECK: ret i8* %s
define i8* @foo(i32 %n) nounwind {
entry:
%s = load i8** @x
%0 = tail call i8* @objc_retain(i8* %s) nounwind
%t = load i8** @x
ret i8* %s
}
|
