1 ; Test lib call simplification of __strcpy_chk calls with various values
2 ; for src, dst, and slen.
4 ; RUN: opt < %s -instcombine -S | FileCheck %s
6 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"
8 @a = common global [60 x i8] zeroinitializer, align 1
9 @b = common global [60 x i8] zeroinitializer, align 1
10 @.str = private constant [8 x i8] c"abcdefg\00"
12 ; Check cases where slen >= strlen (src).
14 define void @test_simplify1() {
15 ; CHECK: @test_simplify1
16 %dst = getelementptr inbounds [60 x i8]* @a, i32 0, i32 0
17 %src = getelementptr inbounds [8 x i8]* @.str, i32 0, i32 0
19 ; CHECK-NEXT: call i8* @strcpy
20 call i8* @__strcpy_chk(i8* %dst, i8* %src, i32 60)
24 define void @test_simplify2() {
25 ; CHECK: @test_simplify2
26 %dst = getelementptr inbounds [60 x i8]* @a, i32 0, i32 0
27 %src = getelementptr inbounds [8 x i8]* @.str, i32 0, i32 0
29 ; CHECK-NEXT: call i8* @strcpy
30 call i8* @__strcpy_chk(i8* %dst, i8* %src, i32 8)
34 define void @test_simplify3() {
35 ; CHECK: @test_simplify3
36 %dst = getelementptr inbounds [60 x i8]* @a, i32 0, i32 0
37 %src = getelementptr inbounds [8 x i8]* @.str, i32 0, i32 0
39 ; CHECK-NEXT: call i8* @strcpy
40 call i8* @__strcpy_chk(i8* %dst, i8* %src, i32 -1)
44 ; Check cases where there are no string constants.
46 define void @test_simplify4() {
47 ; CHECK: @test_simplify4
48 %dst = getelementptr inbounds [60 x i8]* @a, i32 0, i32 0
49 %src = getelementptr inbounds [60 x i8]* @b, i32 0, i32 0
51 ; CHECK-NEXT: call i8* @strcpy
52 call i8* @__strcpy_chk(i8* %dst, i8* %src, i32 -1)
56 define void @test_no_simplify1() {
57 ; CHECK: @test_no_simplify1
58 %dst = getelementptr inbounds [60 x i8]* @a, i32 0, i32 0
59 %src = getelementptr inbounds [60 x i8]* @b, i32 0, i32 0
61 ; CHECK-NEXT: call i8* @__strcpy_chk
62 call i8* @__strcpy_chk(i8* %dst, i8* %src, i32 8)
66 ; Check case were slen < strlen (src).
68 define void @test_no_simplify2() {
69 ; CHECK: @test_no_simplify2
70 %dst = getelementptr inbounds [60 x i8]* @a, i32 0, i32 0
71 %src = getelementptr inbounds [8 x i8]* @.str, i32 0, i32 0
73 ; CHECK-NEXT: call i8* @__strcpy_chk
74 call i8* @__strcpy_chk(i8* %dst, i8* %src, i32 3)
78 define void @test_no_simplify3() {
79 ; CHECK: @test_no_simplify3
80 %dst = getelementptr inbounds [60 x i8]* @a, i32 0, i32 0
81 %src = getelementptr inbounds [8 x i8]* @.str, i32 0, i32 0
83 ; CHECK-NEXT: call i8* @__strcpy_chk
84 call i8* @__strcpy_chk(i8* %dst, i8* %src, i32 0)
88 declare i8* @__strcpy_chk(i8*, i8*, i32) nounwind