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
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
|
; RUN: opt < %s -lint -disable-output 2>&1 | FileCheck %s
%s = type { i8 }
; Function Attrs: argmemonly nounwind
declare void @llvm.memcpy.p0i8.p0i8.i32(i8* nocapture writeonly, i8* nocapture readonly, i32, i1) #0
; Function Attrs: argmemonly nounwind
declare void @llvm.memset.p0i8.i32(i8* nocapture writeonly, i8, i32, i1) #0
declare void @f1(%s* noalias nocapture sret(%s), %s* nocapture readnone)
define void @f2() {
entry:
%c = alloca %s
%tmp = alloca %s
%0 = bitcast %s* %c to i8*
%1 = bitcast %s* %tmp to i8*
call void @llvm.memset.p0i8.i32(i8* %0, i8 0, i32 1, i1 false)
call void @f1(%s* sret(%s) %c, %s* %c)
ret void
}
; Lint should complain about us passing %c to both arguments since one of them
; is noalias.
; CHECK: Unusual: noalias argument aliases another argument
; CHECK-NEXT: call void @f1(%s* sret(%s) %c, %s* %c)
declare void @f3(%s* noalias nocapture sret(%s), %s* byval(%s) nocapture readnone)
define void @f4() {
entry:
%c = alloca %s
%tmp = alloca %s
%0 = bitcast %s* %c to i8*
%1 = bitcast %s* %tmp to i8*
call void @llvm.memset.p0i8.i32(i8* %0, i8 0, i32 1, i1 false)
call void @f3(%s* sret(%s) %c, %s* byval(%s) %c)
ret void
}
; Lint should not complain about passing %c to both arguments even if one is
; noalias, since the other one is byval, effectively copying the data to the
; stack instead of passing the pointer itself.
; CHECK-NOT: Unusual: noalias argument aliases another argument
; CHECK-NOT: call void @f3(%s* sret(%s) %c, %s* byval(%s) %c)
attributes #0 = { argmemonly nounwind }
|
