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
12 @percent_s = constant [3 x i8] c"%s\00"
14 declare i32 @sprintf(i8**, i32*, ...)
15 declare i8* @stpcpy(i8*, i8*)
17 define i8* @test_simplify1() {
18 ; CHECK-LABEL: @test_simplify1(
19 ; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* noundef nonnull align 1 dereferenceable(6) getelementptr inbounds ([32 x i8], [32 x i8]* @a, i32 0, i32 0), i8* noundef nonnull align 1 dereferenceable(6) getelementptr inbounds ([6 x i8], [6 x i8]* @hello, i32 0, i32 0), i32 6, i1 false)
20 ; CHECK-NEXT: ret i8* getelementptr inbounds ([32 x i8], [32 x i8]* @a, i32 0, i32 5)
22 %dst = getelementptr [32 x i8], [32 x i8]* @a, i32 0, i32 0
23 %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* noundef nonnull dereferenceable(1) 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]]
34 %dst = getelementptr [32 x i8], [32 x i8]* @a, i32 0, i32 0
35 %ret = call i8* @stpcpy(i8* %dst, i8* %dst)
39 define void @test_simplify3(i8* %dst) {
40 ; CHECK-LABEL: @test_simplify3(
41 ; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* noundef nonnull align 1 dereferenceable(80) [[DST:%.*]], i8* noundef nonnull align 1 dereferenceable(6) getelementptr inbounds ([6 x i8], [6 x i8]* @hello, i32 0, i32 0), i32 6, i1 false)
42 ; CHECK-NEXT: ret void
44 %src = getelementptr [6 x i8], [6 x i8]* @hello, i32 0, i32 0
45 call i8* @stpcpy(i8* dereferenceable(80) %dst, i8* %src)
49 define i8* @test_no_simplify1() {
50 ; CHECK-LABEL: @test_no_simplify1(
51 ; 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))
52 ; CHECK-NEXT: ret i8* [[RET]]
54 %dst = getelementptr [32 x i8], [32 x i8]* @a, i32 0, i32 0
55 %src = getelementptr [32 x i8], [32 x i8]* @b, i32 0, i32 0
56 %ret = call i8* @stpcpy(i8* %dst, i8* %src)
60 define i8* @test_no_incompatible_attr() {
61 ; CHECK-LABEL: @test_no_incompatible_attr(
62 ; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* noundef nonnull align 1 dereferenceable(6) getelementptr inbounds ([32 x i8], [32 x i8]* @a, i32 0, i32 0), i8* noundef nonnull align 1 dereferenceable(6) getelementptr inbounds ([6 x i8], [6 x i8]* @hello, i32 0, i32 0), i32 6, i1 false)
63 ; CHECK-NEXT: ret i8* getelementptr inbounds ([32 x i8], [32 x i8]* @a, i32 0, i32 5)
65 %dst = getelementptr [32 x i8], [32 x i8]* @a, i32 0, i32 0
66 %src = getelementptr [6 x i8], [6 x i8]* @hello, i32 0, i32 0
67 %ret = call dereferenceable(1) i8* @stpcpy(i8* %dst, i8* %src)
71 ; The libcall prototype checker does not check for exact pointer type
72 ; (just pointer of some type), so we identify this as a standard sprintf
73 ; call. This requires a cast to operate on mismatched pointer types.
75 define i32 @PR51200(i8** %p, i32* %p2) {
76 ; CHECK-LABEL: @PR51200(
77 ; CHECK-NEXT: [[CSTR:%.*]] = bitcast i8** [[P:%.*]] to i8*
78 ; CHECK-NEXT: [[CSTR1:%.*]] = bitcast i32* [[P2:%.*]] to i8*
79 ; CHECK-NEXT: [[STPCPY:%.*]] = call i8* @stpcpy(i8* [[CSTR]], i8* [[CSTR1]])
80 ; CHECK-NEXT: [[TMP1:%.*]] = ptrtoint i8* [[STPCPY]] to i32
81 ; CHECK-NEXT: [[TMP2:%.*]] = zext i32 [[TMP1]] to i64
82 ; CHECK-NEXT: [[TMP3:%.*]] = ptrtoint i8** [[P]] to i32
83 ; CHECK-NEXT: [[TMP4:%.*]] = zext i32 [[TMP3]] to i64
84 ; CHECK-NEXT: [[TMP5:%.*]] = sub nsw i64 [[TMP2]], [[TMP4]]
85 ; CHECK-NEXT: [[TMP6:%.*]] = lshr exact i64 [[TMP5]], 2
86 ; CHECK-NEXT: [[TMP7:%.*]] = trunc i64 [[TMP6]] to i32
87 ; CHECK-NEXT: ret i32 [[TMP7]]
89 %call = call i32 (i8**, i32*, ...) @sprintf(i8** %p, i32* bitcast ([3 x i8]* @percent_s to i32*), i32* %p2)