1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
|
; RUN: opt < %s -basicaa -gvn -S | FileCheck %s
; The input *.ll is obtained by manually annotating "invariant.load" to the
; two loads. With "invariant.load" metadata, the second load is redundant.
;
; int foo(int *p, char *q) {
; *q = (char)*p;
; return *p + 1;
; }
define i32 @foo(i32* nocapture %p, i8* nocapture %q) {
entry:
%0 = load i32* %p, align 4, !tbaa !0, !invariant.load !3
%conv = trunc i32 %0 to i8
store i8 %conv, i8* %q, align 1, !tbaa !1
%1 = load i32* %p, align 4, !tbaa !0, !invariant.load !3
%add = add nsw i32 %1, 1
ret i32 %add
; CHECK: foo
; CHECK: %0 = load i32* %p
; CHECK: store i8 %conv, i8* %q,
; CHECK: %add = add nsw i32 %0, 1
}
!0 = metadata !{metadata !"int", metadata !1}
!1 = metadata !{metadata !"omnipotent char", metadata !2}
!2 = metadata !{metadata !"Simple C/C++ TBAA"}
!3 = metadata !{}
|
