1; RUN: opt -sroa -S < %s | FileCheck %s
2
3; This test checks that SROA does not introduce ptrtoint and inttoptr
4; casts from and to non-integral pointers.  The "ni:4" bit in the
5; datalayout states that pointers of address space 4 are to be
6; considered "non-integral".
7
8target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128-ni:4"
9target triple = "x86_64-unknown-linux-gnu"
10
11define void @f0(i1 %alwaysFalse, i64 %val) {
12; CHECK-LABEL: @f0(
13; CHECK-NOT: inttoptr
14; CHECK-NOT: ptrtoint
15entry:
16  %loc = alloca i64
17  store i64 %val, i64* %loc
18  br i1 %alwaysFalse, label %neverTaken, label %alwaysTaken
19
20neverTaken:
21  %loc.bc = bitcast i64* %loc to i8 addrspace(4)**
22  %ptr = load i8 addrspace(4)*, i8 addrspace(4)** %loc.bc
23  store i8 5, i8 addrspace(4)* %ptr
24  ret void
25
26alwaysTaken:
27  ret void
28}
29
30define i64 @f1(i1 %alwaysFalse, i8 addrspace(4)* %val) {
31; CHECK-LABEL: @f1(
32; CHECK-NOT: inttoptr
33; CHECK-NOT: ptrtoint
34entry:
35  %loc = alloca i8 addrspace(4)*
36  store i8 addrspace(4)* %val, i8 addrspace(4)** %loc
37  br i1 %alwaysFalse, label %neverTaken, label %alwaysTaken
38
39neverTaken:
40  %loc.bc = bitcast i8 addrspace(4)** %loc to i64*
41  %int = load i64, i64* %loc.bc
42  ret i64 %int
43
44alwaysTaken:
45  ret i64 42
46}
47
48define i64 addrspace(4)* @memset(i1 %alwaysFalse) {
49; CHECK-LABEL: @memset(
50; CHECK-NOT: inttoptr
51; CHECK-NOT: ptrtoint
52entry:
53  %x = alloca i64 addrspace(4)*
54  %cast.0 = bitcast i64 addrspace(4)** %x to i8*
55  call void @llvm.memset.p0i8.i64(i8* align 8 %cast.0, i8 5, i64 16, i1 false)
56  br i1 %alwaysFalse, label %neverTaken, label %alwaysTaken
57
58neverTaken:
59  %x.field.ld.0 = load i64 addrspace(4)*, i64 addrspace(4)** %x
60  ret i64 addrspace(4)* %x.field.ld.0
61
62alwaysTaken:
63  ret i64 addrspace(4)* null
64}
65
66;; TODO: This one demonstrates a missed oppurtunity.  The only known bit
67;; pattern for a non-integral bit pattern is that null is zero.  As such
68;; we could do SROA and replace the memset w/a null store.  This will
69;; usually be gotten by instcombine.
70define i64 addrspace(4)* @memset_null(i1 %alwaysFalse) {
71; CHECK-LABEL: @memset_null(
72; CHECK-NOT: inttoptr
73; CHECK-NOT: ptrtoint
74entry:
75  %x = alloca i64 addrspace(4)*
76  %cast.0 = bitcast i64 addrspace(4)** %x to i8*
77  call void @llvm.memset.p0i8.i64(i8* align 8 %cast.0, i8 0, i64 16, i1 false)
78  br i1 %alwaysFalse, label %neverTaken, label %alwaysTaken
79
80neverTaken:
81  %x.field.ld.0 = load i64 addrspace(4)*, i64 addrspace(4)** %x
82  ret i64 addrspace(4)* %x.field.ld.0
83
84alwaysTaken:
85  ret i64 addrspace(4)* null
86}
87
88declare void @llvm.memset.p0i8.i64(i8*, i8, i64, i1)
89