| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ; Test that the stpcpy library call simplifier works correctly. |
| ; RUN: opt < %s -instcombine -S | FileCheck %s |
| ; |
| ; This transformation requires the pointer size, as it assumes that size_t is |
| ; the size of a pointer. |
| 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" |
| |
| @hello = constant [6 x i8] c"hello\00" |
| @a = common global [32 x i8] zeroinitializer, align 1 |
| @b = common global [32 x i8] zeroinitializer, align 1 |
| @percent_s = constant [3 x i8] c"%s\00" |
| |
| declare i32 @sprintf(i8**, i32*, ...) |
| declare i8* @stpcpy(i8*, i8*) |
| |
| define i8* @test_simplify1() { |
| ; CHECK-LABEL: @test_simplify1( |
| ; 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) |
| ; CHECK-NEXT: ret i8* getelementptr inbounds ([32 x i8], [32 x i8]* @a, i32 0, i32 5) |
| ; |
| %dst = getelementptr [32 x i8], [32 x i8]* @a, i32 0, i32 0 |
| %src = getelementptr [6 x i8], [6 x i8]* @hello, i32 0, i32 0 |
| %ret = call i8* @stpcpy(i8* %dst, i8* %src) |
| ret i8* %ret |
| } |
| |
| define i8* @test_simplify2() { |
| ; CHECK-LABEL: @test_simplify2( |
| ; CHECK-NEXT: [[STRLEN:%.*]] = call i32 @strlen(i8* noundef nonnull dereferenceable(1) getelementptr inbounds ([32 x i8], [32 x i8]* @a, i32 0, i32 0)) |
| ; CHECK-NEXT: [[TMP1:%.*]] = getelementptr inbounds [32 x i8], [32 x i8]* @a, i32 0, i32 [[STRLEN]] |
| ; CHECK-NEXT: ret i8* [[TMP1]] |
| ; |
| %dst = getelementptr [32 x i8], [32 x i8]* @a, i32 0, i32 0 |
| %ret = call i8* @stpcpy(i8* %dst, i8* %dst) |
| ret i8* %ret |
| } |
| |
| define void @test_simplify3(i8* %dst) { |
| ; CHECK-LABEL: @test_simplify3( |
| ; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* noundef nonnull align 1 dereferenceable(6) [[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) |
| ; CHECK-NEXT: ret void |
| ; |
| %src = getelementptr [6 x i8], [6 x i8]* @hello, i32 0, i32 0 |
| call i8* @stpcpy(i8* dereferenceable(80) %dst, i8* %src) |
| ret void |
| } |
| |
| define i8* @test_no_simplify1() { |
| ; CHECK-LABEL: @test_no_simplify1( |
| ; 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)) |
| ; CHECK-NEXT: ret i8* [[RET]] |
| ; |
| %dst = getelementptr [32 x i8], [32 x i8]* @a, i32 0, i32 0 |
| %src = getelementptr [32 x i8], [32 x i8]* @b, i32 0, i32 0 |
| %ret = call i8* @stpcpy(i8* %dst, i8* %src) |
| ret i8* %ret |
| } |
| |
| define i8* @test_no_incompatible_attr() { |
| ; CHECK-LABEL: @test_no_incompatible_attr( |
| ; 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) |
| ; CHECK-NEXT: ret i8* getelementptr inbounds ([32 x i8], [32 x i8]* @a, i32 0, i32 5) |
| ; |
| %dst = getelementptr [32 x i8], [32 x i8]* @a, i32 0, i32 0 |
| %src = getelementptr [6 x i8], [6 x i8]* @hello, i32 0, i32 0 |
| %ret = call dereferenceable(1) i8* @stpcpy(i8* %dst, i8* %src) |
| ret i8* %ret |
| } |
| |
| ; The libcall prototype checker does not check for exact pointer type |
| ; (just pointer of some type), so we identify this as a standard sprintf |
| ; call. This requires a cast to operate on mismatched pointer types. |
| |
| define i32 @PR51200(i8** %p, i32* %p2) { |
| ; CHECK-LABEL: @PR51200( |
| ; CHECK-NEXT: [[CSTR:%.*]] = bitcast i8** [[P:%.*]] to i8* |
| ; CHECK-NEXT: [[CSTR1:%.*]] = bitcast i32* [[P2:%.*]] to i8* |
| ; CHECK-NEXT: [[STPCPY:%.*]] = call i8* @stpcpy(i8* [[CSTR]], i8* [[CSTR1]]) |
| ; CHECK-NEXT: [[TMP1:%.*]] = ptrtoint i8* [[STPCPY]] to i32 |
| ; CHECK-NEXT: [[TMP2:%.*]] = zext i32 [[TMP1]] to i64 |
| ; CHECK-NEXT: [[TMP3:%.*]] = ptrtoint i8** [[P]] to i32 |
| ; CHECK-NEXT: [[TMP4:%.*]] = zext i32 [[TMP3]] to i64 |
| ; CHECK-NEXT: [[TMP5:%.*]] = sub nsw i64 [[TMP2]], [[TMP4]] |
| ; CHECK-NEXT: [[TMP6:%.*]] = lshr exact i64 [[TMP5]], 2 |
| ; CHECK-NEXT: [[TMP7:%.*]] = trunc i64 [[TMP6]] to i32 |
| ; CHECK-NEXT: ret i32 [[TMP7]] |
| ; |
| %call = call i32 (i8**, i32*, ...) @sprintf(i8** %p, i32* bitcast ([3 x i8]* @percent_s to i32*), i32* %p2) |
| ret i32 %call |
| } |