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
|
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
; RUN: opt -S -passes="default<O3>" < %s | FileCheck %s
; Make sure that interaction of "writable" with various passes does not
; result in the elimination of the store prior to @j().
; FIXME: This is a miscompile.
declare void @use(i64)
define void @j(ptr %p) optnone noinline {
; CHECK-LABEL: define void @j(
; CHECK-SAME: ptr [[P:%.*]]) local_unnamed_addr #[[ATTR0:[0-9]+]] {
; CHECK-NEXT: [[I:%.*]] = load i64, ptr [[P]], align 4
; CHECK-NEXT: call void @use(i64 [[I]])
; CHECK-NEXT: ret void
;
%i = load i64, ptr %p
call void @use(i64 %i)
ret void
}
define void @h(ptr %p) {
; CHECK-LABEL: define void @h(
; CHECK-SAME: ptr initializes((0, 8)) [[P:%.*]]) local_unnamed_addr {
; CHECK-NEXT: store i64 3, ptr [[P]], align 4
; CHECK-NEXT: tail call void @j(ptr nonnull [[P]])
; CHECK-NEXT: ret void
;
store i64 3, ptr %p
call void @j(ptr %p)
ret void
}
define void @g(ptr dead_on_unwind noalias writable dereferenceable(8) align 8 %p) minsize {
; CHECK-LABEL: define void @g(
; CHECK-SAME: ptr dead_on_unwind noalias nocapture writable writeonly align 8 dereferenceable(8) initializes((0, 8)) [[P:%.*]]) local_unnamed_addr #[[ATTR1:[0-9]+]] {
; CHECK-NEXT: tail call void @h(ptr nonnull [[P]])
; CHECK-NEXT: ret void
;
%a = alloca i64
call void @h(ptr %a)
call void @llvm.memcpy(ptr align 8 %p, ptr align 8 %a, i64 8, i1 false)
ret void
}
define void @f(ptr dead_on_unwind noalias %p) {
; CHECK-LABEL: define void @f(
; CHECK-SAME: ptr dead_on_unwind noalias initializes((0, 8)) [[P:%.*]]) local_unnamed_addr {
; CHECK-NEXT: store i64 3, ptr [[P]], align 4
; CHECK-NEXT: tail call void @j(ptr nonnull align 8 dereferenceable(8) [[P]])
; CHECK-NEXT: store i64 43, ptr [[P]], align 4
; CHECK-NEXT: ret void
;
call void @g(ptr %p)
store i64 43, ptr %p
ret void
}
|
