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
55
56
57
58
59
60
61
62
|
; RUN: opt < %s -S -ipsccp | FileCheck %s
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
define void @fn2() {
entry:
br label %if.end
for.cond1: ; preds = %if.end, %for.end
br i1 undef, label %if.end, label %if.end
if.end: ; preds = %lbl, %for.cond1
%e.2 = phi i32* [ undef, %entry ], [ null, %for.cond1 ], [ null, %for.cond1 ]
%0 = load i32, i32* %e.2, align 4
%call = call i32 @fn1(i32 %0)
br label %for.cond1
}
define internal i32 @fn1(i32 %p1) {
entry:
%tobool = icmp ne i32 %p1, 0
%cond = select i1 %tobool, i32 %p1, i32 %p1
ret i32 %cond
}
define void @fn_no_null_opt() #0 {
entry:
br label %if.end
for.cond1: ; preds = %if.end, %for.end
br i1 undef, label %if.end, label %if.end
if.end: ; preds = %lbl, %for.cond1
%e.2 = phi i32* [ undef, %entry ], [ null, %for.cond1 ], [ null, %for.cond1 ]
%0 = load i32, i32* %e.2, align 4
%call = call i32 @fn0(i32 %0)
br label %for.cond1
}
define internal i32 @fn0(i32 %p1) {
entry:
%tobool = icmp ne i32 %p1, 0
%cond = select i1 %tobool, i32 %p1, i32 %p1
ret i32 %cond
}
attributes #0 = { "null-pointer-is-valid"="true" }
; CHECK-LABEL: define void @fn2(
; CHECK: call i32 @fn1(i32 undef)
; CHECK-LABEL: define internal i32 @fn1(
; CHECK:%[[COND:.*]] = select i1 undef, i32 undef, i32 undef
; CHECK: ret i32 %[[COND]]
; CHECK-LABEL: define void @fn_no_null_opt(
; CHECK: call i32 @fn0(i32 %0)
; CHECK-LABEL: define internal i32 @fn0(
; CHECK:%[[TOBOOL:.*]] = icmp ne i32 %p1, 0
; CHECK:%[[COND:.*]] = select i1 %[[TOBOOL]], i32 %p1, i32 %p1
; CHECK: ret i32 %[[COND]]
|
