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
63
|
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -instcombine -S | FileCheck %s
; InstCombine should mark null-checked argument as nonnull at callsite
declare void @dummy(i32*, i32)
define void @test(i32* %a, i32 %b) {
; CHECK-LABEL: @test(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[COND1:%.*]] = icmp eq i32* [[A:%.*]], null
; CHECK-NEXT: br i1 [[COND1]], label [[DEAD:%.*]], label [[NOT_NULL:%.*]]
; CHECK: not_null:
; CHECK-NEXT: [[COND2:%.*]] = icmp eq i32 [[B:%.*]], 0
; CHECK-NEXT: br i1 [[COND2]], label [[DEAD]], label [[NOT_ZERO:%.*]]
; CHECK: not_zero:
; CHECK-NEXT: call void @dummy(i32* nonnull [[A]], i32 [[B]])
; CHECK-NEXT: ret void
; CHECK: dead:
; CHECK-NEXT: unreachable
;
entry:
%cond1 = icmp eq i32* %a, null
br i1 %cond1, label %dead, label %not_null
not_null:
%cond2 = icmp eq i32 %b, 0
br i1 %cond2, label %dead, label %not_zero
not_zero:
call void @dummy(i32* %a, i32 %b)
ret void
dead:
unreachable
}
; The nonnull attribute in the 'bar' declaration is
; propagated to the parameters of the 'baz' callsite.
declare void @bar(i8*, i8* nonnull noundef)
declare void @bar_without_noundef(i8*, i8* nonnull)
declare void @baz(i8*, i8*)
define void @deduce_nonnull_from_another_call(i8* %a, i8* %b) {
; CHECK-LABEL: @deduce_nonnull_from_another_call(
; CHECK-NEXT: call void @bar(i8* [[A:%.*]], i8* [[B:%.*]])
; CHECK-NEXT: call void @baz(i8* nonnull [[B]], i8* nonnull [[B]])
; CHECK-NEXT: ret void
;
call void @bar(i8* %a, i8* %b)
call void @baz(i8* %b, i8* %b)
ret void
}
define void @deduce_nonnull_from_another_call2(i8* %a, i8* %b) {
; CHECK-LABEL: @deduce_nonnull_from_another_call2(
; CHECK-NEXT: call void @bar_without_noundef(i8* [[A:%.*]], i8* [[B:%.*]])
; CHECK-NEXT: call void @baz(i8* [[B]], i8* [[B]])
; CHECK-NEXT: ret void
;
call void @bar_without_noundef(i8* %a, i8* %b)
call void @baz(i8* %b, i8* %b)
ret void
}
|
