1 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2 ; Test that the stpcpy library call simplifier works correctly.
3 ; RUN: opt < %s -instcombine -S | FileCheck %s
5 ; This transformation requires the pointer size, as it assumes that size_t is
6 ; the size of a pointer.
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-n8:16:32"
9 @hello = constant [6 x i8] c"hello\00"
10 @a = common global [32 x i8] zeroinitializer, align 1
11 @b = common global [32 x i8] zeroinitializer, align 1
13 declare i8* @stpcpy(i8*, i8*)
15 define i8* @test_simplify1() {
16 ; CHECK-LABEL: @test_simplify1(
17 ; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* align 1 dereferenceable(6) getelementptr inbounds ([32 x i8], [32 x i8]* @a, i32 0, i32 0), i8* align 1 dereferenceable(6) getelementptr inbounds ([6 x i8], [6 x i8]* @hello, i32 0, i32 0), i32 6, i1 false)
18 ; CHECK-NEXT: ret i8* getelementptr inbounds ([32 x i8], [32 x i8]* @a, i32 0, i32 5)
21 %dst = getelementptr [32 x i8], [32 x i8]* @a, i32 0, i32 0
22 %src = getelementptr [6 x i8], [6 x i8]* @hello, i32 0, i32 0
24 %ret = call i8* @stpcpy(i8* %dst, i8* %src)
28 define i8* @test_simplify2() {
29 ; CHECK-LABEL: @test_simplify2(
30 ; CHECK-NEXT: [[STRLEN:%.*]] = call i32 @strlen(i8* getelementptr inbounds ([32 x i8], [32 x i8]* @a, i32 0, i32 0))
31 ; CHECK-NEXT: [[TMP1:%.*]] = getelementptr inbounds [32 x i8], [32 x i8]* @a, i32 0, i32 [[STRLEN]]
32 ; CHECK-NEXT: ret i8* [[TMP1]]
35 %dst = getelementptr [32 x i8], [32 x i8]* @a, i32 0, i32 0
37 %ret = call i8* @stpcpy(i8* %dst, i8* %dst)
41 define i8* @test_no_simplify1() {
42 ; CHECK-LABEL: @test_no_simplify1(
43 ; CHECK-NEXT: [[RET:%.*]] = call i8* @stpcpy(i8* getelementptr inbounds ([32 x i8], [32 x i8]* @a, i32 0, i32 0), i8* getelementptr inbounds ([32 x i8], [32 x i8]* @b, i32 0, i32 0))
44 ; CHECK-NEXT: ret i8* [[RET]]
47 %dst = getelementptr [32 x i8], [32 x i8]* @a, i32 0, i32 0
48 %src = getelementptr [32 x i8], [32 x i8]* @b, i32 0, i32 0
50 %ret = call i8* @stpcpy(i8* %dst, i8* %src)