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 -passes=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 ptr @stpcpy(ptr, ptr)
16 define ptr @test_simplify1() {
17 ; CHECK-LABEL: @test_simplify1(
18 ; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i32(ptr noundef nonnull align 1 dereferenceable(6) @a, ptr noundef nonnull align 1 dereferenceable(6) @hello, i32 6, i1 false)
19 ; CHECK-NEXT: ret ptr getelementptr inbounds (i8, ptr @a, i32 5)
21 %ret = call ptr @stpcpy(ptr @a, ptr @hello)
25 define ptr @test_simplify2() {
26 ; CHECK-LABEL: @test_simplify2(
27 ; CHECK-NEXT: [[STRLEN:%.*]] = call i32 @strlen(ptr noundef nonnull dereferenceable(1) @a)
28 ; CHECK-NEXT: [[RET:%.*]] = getelementptr inbounds i8, ptr @a, i32 [[STRLEN]]
29 ; CHECK-NEXT: ret ptr [[RET]]
31 %ret = call ptr @stpcpy(ptr @a, ptr @a)
35 define void @test_simplify3(ptr %dst) {
36 ; CHECK-LABEL: @test_simplify3(
37 ; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i32(ptr noundef nonnull align 1 dereferenceable(6) [[DST:%.*]], ptr noundef nonnull align 1 dereferenceable(6) @hello, i32 6, i1 false)
38 ; CHECK-NEXT: ret void
40 call ptr @stpcpy(ptr dereferenceable(80) %dst, ptr @hello)
44 define ptr @test_no_simplify1() {
45 ; CHECK-LABEL: @test_no_simplify1(
46 ; CHECK-NEXT: [[RET:%.*]] = call ptr @stpcpy(ptr nonnull @a, ptr nonnull @b)
47 ; CHECK-NEXT: ret ptr [[RET]]
49 %ret = call ptr @stpcpy(ptr @a, ptr @b)
53 define ptr @test_no_simplify2(ptr %dst, ptr %src) {
54 ; CHECK-LABEL: @test_no_simplify2(
55 ; CHECK-NEXT: [[RET:%.*]] = musttail call ptr @stpcpy(ptr [[DST:%.*]], ptr [[SRC:%.*]])
56 ; CHECK-NEXT: ret ptr [[RET]]
58 %ret = musttail call ptr @stpcpy(ptr %dst, ptr %src)
62 define ptr @test_no_incompatible_attr() {
63 ; CHECK-LABEL: @test_no_incompatible_attr(
64 ; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i32(ptr noundef nonnull align 1 dereferenceable(6) @a, ptr noundef nonnull align 1 dereferenceable(6) @hello, i32 6, i1 false)
65 ; CHECK-NEXT: ret ptr getelementptr inbounds (i8, ptr @a, i32 5)
67 %ret = call dereferenceable(1) ptr @stpcpy(ptr @a, ptr @hello)