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
|
; RUN: opt < %s -gvn -enable-pre -S | FileCheck %s
@H = common global i32 0
@G = common global i32 0
define i32 @test1(i1 %cond, i32 %v) nounwind {
; CHECK-LABEL: @test1
entry:
br i1 %cond, label %bb, label %bb1
bb:
%add.1 = add nuw nsw i32 %v, 42
; CHECK: %add.1 = add i32 %v, 42
store i32 %add.1, i32* @G, align 4
br label %return
bb1:
; CHECK: %.pre = add i32 %v, 42
br label %return
return:
; CHECK: %add.2.pre-phi = phi i32 [ %.pre, %bb1 ], [ %add.1, %bb ]
; CHECK-NEXT: store i32 %add.2.pre-phi, i32* @H, align 4
; CHECK-NEXT: ret i32 0
%add.2 = add i32 %v, 42
store i32 %add.2, i32* @H, align 4
ret i32 0
}
define i32 @test2(i1 %cond, i32 %v) nounwind {
; CHECK-LABEL: @test2
entry:
br i1 %cond, label %bb, label %bb1
bb:
%add.1 = add i32 %v, 42
; CHECK: %add.1 = add i32 %v, 42
store i32 %add.1, i32* @G, align 4
br label %return
bb1:
; CHECK: %.pre = add nuw nsw i32 %v, 42
br label %return
return:
; CHECK: %add.2.pre-phi = phi i32 [ %.pre, %bb1 ], [ %add.1, %bb ]
; CHECK-NEXT: store i32 %add.2.pre-phi, i32* @H, align 4
; CHECK-NEXT: ret i32 0
%add.2 = add nuw nsw i32 %v, 42
store i32 %add.2, i32* @H, align 4
ret i32 0
}
|
