callbr.ll
1.72 KB
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
50
51
52
53
54
; RUN: opt -inline -S < %s | FileCheck %s
; RUN: opt -passes='cgscc(inline)' -S < %s | FileCheck %s
define dso_local i32 @main() #0 {
%1 = alloca i32, align 4
store i32 0, i32* %1, align 4
%2 = call i32 @t32(i32 0)
ret i32 %2
}
define internal i32 @t32(i32) #0 {
%2 = alloca i32, align 4
%3 = alloca i32, align 4
store i32 %0, i32* %3, align 4
%4 = load i32, i32* %3, align 4
callbr void asm sideeffect "testl $0, $0; jne ${1:l};", "r,X,X,~{dirflag},~{fpsr},~{flags}"(i32 %4, i8* blockaddress(@t32, %7), i8* blockaddress(@t32, %6)) #1
to label %5 [label %7, label %6]
; <label>:5: ; preds = %1
store i32 0, i32* %2, align 4
br label %8
; <label>:6: ; preds = %1
store i32 1, i32* %2, align 4
br label %8
; <label>:7: ; preds = %1
store i32 2, i32* %2, align 4
br label %8
; <label>:8: ; preds = %7, %6, %5
%9 = load i32, i32* %2, align 4
ret i32 %9
}
; Check that @t32 no longer exists after inlining, as it has now been inlined
; into @main.
; CHECK-NOT: @t32
; CHECK: define dso_local i32 @main
; CHECK: callbr void asm sideeffect "testl $0, $0; jne ${1:l};", "r,X,X,~{dirflag},~{fpsr},~{flags}"(i32 %6, i8* blockaddress(@main, %9), i8* blockaddress(@main, %8))
; CHECK: to label %7 [label %9, label %8]
; CHECK: 7:
; CHECK-NEXT: store i32 0, i32* %1, align 4
; CHECK-NEXT: br label %t32.exit
; CHECK: 8:
; CHECK-NEXT: store i32 1, i32* %1, align 4
; CHECK-NEXT: br label %t32.exit
; CHECK: 9:
; CHECK-NEXT: store i32 2, i32* %1, align 4
; CHECK-NEXT: br label %t32.exit
; CHECK: t32.exit:
; CHECK-NEXT: %10 = load i32, i32* %1, align 4
; CHECK: ret i32 %10