1 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2 ; Test lib call simplification of __strcpy_chk calls with various values
3 ; for src, dst, and slen.
5 ; RUN: opt < %s -instcombine -S | FileCheck %s
7 target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"
9 @a = common global [60 x i8] zeroinitializer, align 1
10 @b = common global [60 x i8] zeroinitializer, align 1
11 @.str = private constant [12 x i8] c"abcdefghijk\00"
13 ; Check cases where slen >= strlen (src).
15 define i8* @test_simplify1() {
16 ; CHECK-LABEL: @test_simplify1(
17 ; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* noundef nonnull align 1 dereferenceable(12) getelementptr inbounds ([60 x i8], [60 x i8]* @a, i32 0, i32 0), i8* noundef nonnull align 1 dereferenceable(12) getelementptr inbounds ([12 x i8], [12 x i8]* @.str, i32 0, i32 0), i32 12, i1 false)
18 ; CHECK-NEXT: ret i8* getelementptr inbounds ([60 x i8], [60 x i8]* @a, i32 0, i32 0)
20 %dst = getelementptr inbounds [60 x i8], [60 x i8]* @a, i32 0, i32 0
21 %src = getelementptr inbounds [12 x i8], [12 x i8]* @.str, i32 0, i32 0
23 %ret = call i8* @__strcpy_chk(i8* %dst, i8* %src, i32 60)
27 define i8* @test_simplify1_tail() {
28 ; CHECK-LABEL: @test_simplify1_tail(
29 ; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* noundef nonnull align 1 dereferenceable(12) getelementptr inbounds ([60 x i8], [60 x i8]* @a, i32 0, i32 0), i8* noundef nonnull align 1 dereferenceable(12) getelementptr inbounds ([12 x i8], [12 x i8]* @.str, i32 0, i32 0), i32 12, i1 false)
30 ; CHECK-NEXT: ret i8* getelementptr inbounds ([60 x i8], [60 x i8]* @a, i32 0, i32 0)
32 %dst = getelementptr inbounds [60 x i8], [60 x i8]* @a, i32 0, i32 0
33 %src = getelementptr inbounds [12 x i8], [12 x i8]* @.str, i32 0, i32 0
35 %ret = tail call i8* @__strcpy_chk(i8* %dst, i8* %src, i32 60)
39 define i8* @test_simplify2() {
40 ; CHECK-LABEL: @test_simplify2(
41 ; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* noundef nonnull align 1 dereferenceable(12) getelementptr inbounds ([60 x i8], [60 x i8]* @a, i32 0, i32 0), i8* noundef nonnull align 1 dereferenceable(12) getelementptr inbounds ([12 x i8], [12 x i8]* @.str, i32 0, i32 0), i32 12, i1 false)
42 ; CHECK-NEXT: ret i8* getelementptr inbounds ([60 x i8], [60 x i8]* @a, i32 0, i32 0)
44 %dst = getelementptr inbounds [60 x i8], [60 x i8]* @a, i32 0, i32 0
45 %src = getelementptr inbounds [12 x i8], [12 x i8]* @.str, i32 0, i32 0
47 %ret = call i8* @__strcpy_chk(i8* %dst, i8* %src, i32 12)
51 define i8* @test_simplify3() {
52 ; CHECK-LABEL: @test_simplify3(
53 ; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* noundef nonnull align 1 dereferenceable(12) getelementptr inbounds ([60 x i8], [60 x i8]* @a, i32 0, i32 0), i8* noundef nonnull align 1 dereferenceable(12) getelementptr inbounds ([12 x i8], [12 x i8]* @.str, i32 0, i32 0), i32 12, i1 false)
54 ; CHECK-NEXT: ret i8* getelementptr inbounds ([60 x i8], [60 x i8]* @a, i32 0, i32 0)
56 %dst = getelementptr inbounds [60 x i8], [60 x i8]* @a, i32 0, i32 0
57 %src = getelementptr inbounds [12 x i8], [12 x i8]* @.str, i32 0, i32 0
59 %ret = call i8* @__strcpy_chk(i8* %dst, i8* %src, i32 -1)
63 ; Check cases where there are no string constants.
65 define i8* @test_simplify4() {
66 ; CHECK-LABEL: @test_simplify4(
67 ; CHECK-NEXT: [[STRCPY:%.*]] = call i8* @strcpy(i8* noundef nonnull dereferenceable(1) getelementptr inbounds ([60 x i8], [60 x i8]* @a, i32 0, i32 0), i8* noundef nonnull dereferenceable(1) getelementptr inbounds ([60 x i8], [60 x i8]* @b, i32 0, i32 0))
68 ; CHECK-NEXT: ret i8* getelementptr inbounds ([60 x i8], [60 x i8]* @a, i32 0, i32 0)
70 %dst = getelementptr inbounds [60 x i8], [60 x i8]* @a, i32 0, i32 0
71 %src = getelementptr inbounds [60 x i8], [60 x i8]* @b, i32 0, i32 0
73 %ret = call i8* @__strcpy_chk(i8* %dst, i8* %src, i32 -1)
77 define i8* @test_simplify4_tail() {
78 ; CHECK-LABEL: @test_simplify4_tail(
79 ; CHECK-NEXT: [[STRCPY:%.*]] = tail call i8* @strcpy(i8* noundef nonnull dereferenceable(1) getelementptr inbounds ([60 x i8], [60 x i8]* @a, i32 0, i32 0), i8* noundef nonnull dereferenceable(1) getelementptr inbounds ([60 x i8], [60 x i8]* @b, i32 0, i32 0))
80 ; CHECK-NEXT: ret i8* getelementptr inbounds ([60 x i8], [60 x i8]* @a, i32 0, i32 0)
82 %dst = getelementptr inbounds [60 x i8], [60 x i8]* @a, i32 0, i32 0
83 %src = getelementptr inbounds [60 x i8], [60 x i8]* @b, i32 0, i32 0
85 %ret = tail call i8* @__strcpy_chk(i8* %dst, i8* %src, i32 -1)
89 ; Check case where the string length is not constant.
91 define i8* @test_simplify5() {
92 ; CHECK-LABEL: @test_simplify5(
93 ; CHECK-NEXT: [[LEN:%.*]] = call i32 @llvm.objectsize.i32.p0i8(i8* getelementptr inbounds ([60 x i8], [60 x i8]* @a, i32 0, i32 0), i1 false, i1 false, i1 false)
94 ; CHECK-NEXT: [[TMP1:%.*]] = call i8* @__memcpy_chk(i8* getelementptr inbounds ([60 x i8], [60 x i8]* @a, i32 0, i32 0), i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str, i32 0, i32 0), i32 12, i32 [[LEN]])
95 ; CHECK-NEXT: ret i8* [[TMP1]]
97 %dst = getelementptr inbounds [60 x i8], [60 x i8]* @a, i32 0, i32 0
98 %src = getelementptr inbounds [12 x i8], [12 x i8]* @.str, i32 0, i32 0
100 %len = call i32 @llvm.objectsize.i32.p0i8(i8* %dst, i1 false, i1 false, i1 false)
101 %ret = call i8* @__strcpy_chk(i8* %dst, i8* %src, i32 %len)
105 ; Check case where the source and destination are the same.
107 define i8* @test_simplify6() {
108 ; CHECK-LABEL: @test_simplify6(
109 ; CHECK-NEXT: [[LEN:%.*]] = call i32 @llvm.objectsize.i32.p0i8(i8* getelementptr inbounds ([60 x i8], [60 x i8]* @a, i32 0, i32 0), i1 false, i1 false, i1 false)
110 ; CHECK-NEXT: [[RET:%.*]] = call i8* @__strcpy_chk(i8* getelementptr inbounds ([60 x i8], [60 x i8]* @a, i32 0, i32 0), i8* getelementptr inbounds ([60 x i8], [60 x i8]* @a, i32 0, i32 0), i32 [[LEN]])
111 ; CHECK-NEXT: ret i8* [[RET]]
113 %dst = getelementptr inbounds [60 x i8], [60 x i8]* @a, i32 0, i32 0
115 %len = call i32 @llvm.objectsize.i32.p0i8(i8* %dst, i1 false, i1 false, i1 false)
116 %ret = call i8* @__strcpy_chk(i8* %dst, i8* %dst, i32 %len)
120 ; Check cases where there are no string constants, and is a tail call.
122 define i8* @test_simplify7() {
123 ; CHECK-LABEL: @test_simplify7(
124 ; CHECK-NEXT: [[STRCPY:%.*]] = tail call i8* @strcpy(i8* noundef nonnull dereferenceable(1) getelementptr inbounds ([60 x i8], [60 x i8]* @a, i32 0, i32 0), i8* noundef nonnull dereferenceable(1) getelementptr inbounds ([60 x i8], [60 x i8]* @b, i32 0, i32 0))
125 ; CHECK-NEXT: ret i8* getelementptr inbounds ([60 x i8], [60 x i8]* @a, i32 0, i32 0)
127 %dst = getelementptr inbounds [60 x i8], [60 x i8]* @a, i32 0, i32 0
128 %src = getelementptr inbounds [60 x i8], [60 x i8]* @b, i32 0, i32 0
130 %ret = tail call i8* @__strcpy_chk(i8* %dst, i8* %src, i32 -1)
134 ; Check case where slen < strlen (src).
136 define i8* @test_no_simplify1() {
137 ; CHECK-LABEL: @test_no_simplify1(
138 ; CHECK-NEXT: [[RET:%.*]] = call i8* @__strcpy_chk(i8* getelementptr inbounds ([60 x i8], [60 x i8]* @a, i32 0, i32 0), i8* getelementptr inbounds ([60 x i8], [60 x i8]* @b, i32 0, i32 0), i32 8)
139 ; CHECK-NEXT: ret i8* [[RET]]
141 %dst = getelementptr inbounds [60 x i8], [60 x i8]* @a, i32 0, i32 0
142 %src = getelementptr inbounds [60 x i8], [60 x i8]* @b, i32 0, i32 0
144 %ret = call i8* @__strcpy_chk(i8* %dst, i8* %src, i32 8)
148 define i8* @test_no_simplify2(i8* %dst, i8* %src, i32 %a) {
149 ; CHECK-LABEL: @test_no_simplify2(
150 ; CHECK-NEXT: %ret = musttail call i8* @__strcpy_chk(i8* %dst, i8* %src, i32 60)
151 ; CHECK-NEXT: ret i8* %ret
153 %ret = musttail call i8* @__strcpy_chk(i8* %dst, i8* %src, i32 60)
157 declare i8* @__strcpy_chk(i8*, i8*, i32) nounwind
158 declare i32 @llvm.objectsize.i32.p0i8(i8*, i1, i1, i1) nounwind readonly