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
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
|
; RUN: llc -mtriple=x86_64-apple-macosx -O3 -enable-implicit-null-checks -o - < %s 2>&1 | FileCheck %s
declare void @throw0()
declare void @throw1()
define i1 @f(i8* %p0, i8* %p1) {
entry:
%c0 = icmp eq i8* %p0, null
br i1 %c0, label %throw0, label %continue0, !make.implicit !0
continue0:
%v0 = load i8, i8* %p0
%c1 = icmp eq i8* %p1, null
br i1 %c1, label %throw1, label %continue1, !make.implicit !0
continue1:
%v1 = load i8, i8* %p1
%v = icmp eq i8 %v0, %v1
ret i1 %v
throw0:
call void @throw0()
unreachable
throw1:
call void @throw1()
unreachable
}
declare void @foo()
declare token @llvm.experimental.gc.statepoint.p0f_isVoidf(i64, i32, void ()*, i32, i32, ...)
declare i8 addrspace(1)* @llvm.experimental.gc.relocate.p1i8(token, i32, i32) nounwind readonly
; Check for a crash. The crash is not specific to statepoints, but
; gc.statpeoint is an easy way to generate a fill instruction in
; %continue0 (which causes the llc crash).
define i1 @g(i8 addrspace(1)* %p0, i8* %p1) gc "statepoint-example" {
entry:
%c0 = icmp eq i8 addrspace(1)* %p0, null
%tok = call token (i64, i32, void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(i64 0, i32 0, void ()* @foo, i32 0, i32 0, i32 0, i32 0, i8 addrspace(1)* %p0)
%p0.relocated = call coldcc i8 addrspace(1)* @llvm.experimental.gc.relocate.p1i8(token %tok, i32 7, i32 7) ; (%p0, %p0)
br i1 %c0, label %throw0, label %continue0, !make.implicit !0
continue0:
%c1 = icmp eq i8* %p1, null
br i1 %c1, label %throw1, label %continue1, !make.implicit !0
continue1:
%v0 = load i8, i8 addrspace(1)* %p0.relocated
%v1 = load i8, i8* %p1
%v = icmp eq i8 %v0, %v1
ret i1 %v
throw0:
call void @throw0()
unreachable
throw1:
call void @throw1()
unreachable
}
; Check that we have two implicit null checks in @f
; CHECK: __LLVM_FaultMaps:
; CHECK-NEXT: .byte 1
; CHECK-NEXT: .byte 0
; CHECK-NEXT: .short 0
; CHECK-NEXT: .long 1
; FunctionInfo[0] =
; FunctionAddress =
; CHECK-NEXT: .quad _f
; NumFaultingPCs =
; CHECK-NEXT: .long 2
; Reserved =
; CHECK-NEXT: .long 0
!0 = !{}
|
