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
49
|
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -passes=globalopt -S < %s | FileCheck %s
@g = internal global i32* null, align 8
define signext i32 @f() local_unnamed_addr {
; CHECK-LABEL: @f(
; CHECK-NEXT: entry:
; CHECK-NEXT: call void @llvm.memset.p0i8.i64(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @g.body, i32 0, i32 0), i8 0, i64 4, i1 false)
; CHECK-NEXT: store i16 -1, i16* bitcast ([4 x i8]* @g.body to i16*), align 2
; CHECK-NEXT: ret i32 0
;
entry:
%call = call i8* @calloc(i64 1, i64 4)
%b = bitcast i8* %call to i32*
store i32* %b, i32** @g, align 8
%b2 = bitcast i8* %call to i16*
store i16 -1, i16* %b2
ret i32 0
}
define signext i32 @main() {
; CHECK-LABEL: @main(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[CALL:%.*]] = call signext i32 @f()
; CHECK-NEXT: call void @f1()
; CHECK-NEXT: store i32 1, i32* bitcast ([4 x i8]* @g.body to i32*), align 4
; CHECK-NEXT: call void @f1()
; CHECK-NEXT: store i8 2, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @g.body, i32 0, i32 0), align 4
; CHECK-NEXT: call void @f1()
; CHECK-NEXT: [[RES:%.*]] = load i32, i32* bitcast ([4 x i8]* @g.body to i32*), align 4
; CHECK-NEXT: ret i32 [[RES]]
;
entry:
%call = call signext i32 @f()
call void @f1()
%v0 = load i32*, i32** @g, align 8
store i32 1, i32* %v0, align 4
call void @f1()
%v1 = load i8*, i8** bitcast (i32** @g to i8**), align 8
store i8 2, i8* %v1, align 4
call void @f1()
%v2 = load i32*, i32** @g, align 8
%res = load i32, i32* %v2, align 4
ret i32 %res
}
declare noalias align 16 i8* @calloc(i64, i64)
declare void @f1()
|
