; NOTE: Assertions have been autogenerated by utils/update_test_checks.py ; RUN: opt < %s -passes=instcombine -S | FileCheck %s @hello = private constant [11 x i8] c"helloworld\00", align 1 @NoNulTerminator = private constant [10 x i8] c"helloworld", align 1 @StopCharAfterNulTerminator = private constant [12 x i8] c"helloworld\00x", align 1 @StringWithEOF = constant [14 x i8] c"helloworld\FFab\00", align 1 declare ptr @memccpy(ptr, ptr, i32, i64) define ptr @memccpy_to_memcpy(ptr %dst) { ; CHECK-LABEL: @memccpy_to_memcpy( ; CHECK-NEXT: store i64 8245940763182785896, ptr [[DST:%.*]], align 1 ; CHECK-NEXT: [[CALL:%.*]] = getelementptr inbounds i8, ptr [[DST]], i64 8 ; CHECK-NEXT: ret ptr [[CALL]] ; %call = call ptr @memccpy(ptr %dst, ptr @hello, i32 114, i64 12) ; 114 is 'r' ret ptr %call } define ptr @memccpy_to_memcpy2(ptr %dst) { ; CHECK-LABEL: @memccpy_to_memcpy2( ; CHECK-NEXT: store i64 8245940763182785896, ptr [[DST:%.*]], align 1 ; CHECK-NEXT: [[CALL:%.*]] = getelementptr inbounds i8, ptr [[DST]], i64 8 ; CHECK-NEXT: ret ptr [[CALL]] ; %call = call ptr @memccpy(ptr %dst, ptr @hello, i32 114, i64 8); ; 114 is 'r' ret ptr %call } define void @memccpy_to_memcpy3(ptr %dst) { ; CHECK-LABEL: @memccpy_to_memcpy3( ; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr noundef nonnull align 1 dereferenceable(5) [[DST:%.*]], ptr noundef nonnull align 1 dereferenceable(5) @hello, i64 5, i1 false) ; CHECK-NEXT: ret void ; %call = call ptr @memccpy(ptr %dst, ptr @hello, i32 111, i64 10) ; 111 is 'o' ret void } define void @memccpy_to_memcpy3_tail(ptr %dst) { ; CHECK-LABEL: @memccpy_to_memcpy3_tail( ; CHECK-NEXT: tail call void @llvm.memcpy.p0.p0.i64(ptr noundef nonnull align 1 dereferenceable(5) [[DST:%.*]], ptr noundef nonnull align 1 dereferenceable(5) @hello, i64 5, i1 false) ; CHECK-NEXT: ret void ; %call = tail call ptr @memccpy(ptr %dst, ptr @hello, i32 111, i64 10) ; 111 is 'o' ret void } define ptr @memccpy_to_memcpy3_musttail(ptr %dst, ptr %x, i32 %y, i64 %z) { ; CHECK-LABEL: @memccpy_to_memcpy3_musttail( ; CHECK-NEXT: [[CALL:%.*]] = musttail call ptr @memccpy(ptr [[DST:%.*]], ptr nonnull @hello, i32 111, i64 10) ; CHECK-NEXT: ret ptr [[CALL]] ; %call = musttail call ptr @memccpy(ptr %dst, ptr @hello, i32 111, i64 10) ; 111 is 'o' ret ptr %call } define void @memccpy_to_memcpy4(ptr %dst) { ; CHECK-LABEL: @memccpy_to_memcpy4( ; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr noundef nonnull align 1 dereferenceable(11) [[DST:%.*]], ptr noundef nonnull align 1 dereferenceable(11) @hello, i64 11, i1 false) ; CHECK-NEXT: ret void ; %call = call ptr @memccpy(ptr %dst, ptr @hello, i32 0, i64 12) ret void } define ptr @memccpy_to_memcpy5(ptr %dst) { ; CHECK-LABEL: @memccpy_to_memcpy5( ; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr noundef nonnull align 1 dereferenceable(7) [[DST:%.*]], ptr noundef nonnull align 1 dereferenceable(7) @hello, i64 7, i1 false) ; CHECK-NEXT: ret ptr null ; %call = call ptr @memccpy(ptr %dst, ptr @hello, i32 114, i64 7) ret ptr %call } define ptr @memccpy_to_memcpy5_tail(ptr %dst) { ; CHECK-LABEL: @memccpy_to_memcpy5_tail( ; CHECK-NEXT: tail call void @llvm.memcpy.p0.p0.i64(ptr noundef nonnull align 1 dereferenceable(7) [[DST:%.*]], ptr noundef nonnull align 1 dereferenceable(7) @hello, i64 7, i1 false) ; CHECK-NEXT: ret ptr null ; %call = tail call ptr @memccpy(ptr %dst, ptr @hello, i32 114, i64 7) ret ptr %call } define ptr @memccpy_to_memcpy5_musttail(ptr %dst, ptr %x, i32 %y, i64 %z) { ; CHECK-LABEL: @memccpy_to_memcpy5_musttail( ; CHECK-NEXT: [[CALL:%.*]] = musttail call ptr @memccpy(ptr [[DST:%.*]], ptr nonnull @hello, i32 114, i64 7) ; CHECK-NEXT: ret ptr [[CALL]] ; %call = musttail call ptr @memccpy(ptr %dst, ptr @hello, i32 114, i64 7) ret ptr %call } define ptr @memccpy_to_memcpy6(ptr %dst) { ; CHECK-LABEL: @memccpy_to_memcpy6( ; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr noundef nonnull align 1 dereferenceable(6) [[DST:%.*]], ptr noundef nonnull align 1 dereferenceable(6) @hello, i64 6, i1 false) ; CHECK-NEXT: ret ptr null ; %call = call ptr @memccpy(ptr %dst, ptr @hello, i32 114, i64 6); ret ptr %call } define ptr @memccpy_to_memcpy7(ptr %dst) { ; CHECK-LABEL: @memccpy_to_memcpy7( ; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr noundef nonnull align 1 dereferenceable(5) [[DST:%.*]], ptr noundef nonnull align 1 dereferenceable(5) @hello, i64 5, i1 false) ; CHECK-NEXT: ret ptr null ; %call = call ptr @memccpy(ptr %dst, ptr @hello, i32 115, i64 5) ; 115 is 's' ret ptr %call } define ptr @memccpy_to_memcpy8(ptr %dst) { ; CHECK-LABEL: @memccpy_to_memcpy8( ; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr noundef nonnull align 1 dereferenceable(11) [[DST:%.*]], ptr noundef nonnull align 1 dereferenceable(11) @hello, i64 11, i1 false) ; CHECK-NEXT: ret ptr null ; %call = call ptr @memccpy(ptr %dst, ptr @hello, i32 115, i64 11) ; 115 is 's' ret ptr %call } define ptr @memccpy_to_memcpy9(ptr %dst, i64 %n) { ; CHECK-LABEL: @memccpy_to_memcpy9( ; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr noundef nonnull align 1 dereferenceable(12) [[DST:%.*]], ptr noundef nonnull align 1 dereferenceable(12) @StopCharAfterNulTerminator, i64 12, i1 false) ; CHECK-NEXT: [[CALL:%.*]] = getelementptr inbounds i8, ptr [[DST]], i64 12 ; CHECK-NEXT: ret ptr [[CALL]] ; %call = call ptr @memccpy(ptr %dst, ptr @StopCharAfterNulTerminator, i32 120, i64 15) ; 120 is 'x' ret ptr %call } define ptr @memccpy_to_memcpy10(ptr %dst, i64 %n) { ; CHECK-LABEL: @memccpy_to_memcpy10( ; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr noundef nonnull align 1 dereferenceable(11) [[DST:%.*]], ptr noundef nonnull align 1 dereferenceable(11) @StringWithEOF, i64 11, i1 false) ; CHECK-NEXT: [[CALL:%.*]] = getelementptr inbounds i8, ptr [[DST]], i64 11 ; CHECK-NEXT: ret ptr [[CALL]] ; %call = call ptr @memccpy(ptr %dst, ptr @StringWithEOF, i32 255, i64 15) ret ptr %call } define ptr @memccpy_to_memcpy11(ptr %dst, i64 %n) { ; CHECK-LABEL: @memccpy_to_memcpy11( ; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr noundef nonnull align 1 dereferenceable(11) [[DST:%.*]], ptr noundef nonnull align 1 dereferenceable(11) @StringWithEOF, i64 11, i1 false) ; CHECK-NEXT: [[CALL:%.*]] = getelementptr inbounds i8, ptr [[DST]], i64 11 ; CHECK-NEXT: ret ptr [[CALL]] ; %call = call ptr @memccpy(ptr %dst, ptr @StringWithEOF, i32 -1, i64 15) ret ptr %call } define ptr @memccpy_to_memcpy12(ptr %dst, i64 %n) { ; CHECK-LABEL: @memccpy_to_memcpy12( ; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr noundef nonnull align 1 dereferenceable(11) [[DST:%.*]], ptr noundef nonnull align 1 dereferenceable(11) @StringWithEOF, i64 11, i1 false) ; CHECK-NEXT: [[CALL:%.*]] = getelementptr inbounds i8, ptr [[DST]], i64 11 ; CHECK-NEXT: ret ptr [[CALL]] ; %call = call ptr @memccpy(ptr %dst, ptr @StringWithEOF, i32 1023, i64 15) ret ptr %call } define ptr @memccpy_to_null(ptr %dst, ptr %src, i32 %c) { ; CHECK-LABEL: @memccpy_to_null( ; CHECK-NEXT: ret ptr null ; %call = call ptr @memccpy(ptr %dst, ptr %src, i32 %c, i64 0) ret ptr %call } define void @memccpy_dst_src_same_retval_unused(ptr %dst, i32 %c, i64 %n) { ; CHECK-LABEL: @memccpy_dst_src_same_retval_unused( ; CHECK-NEXT: ret void ; %call = call ptr @memccpy(ptr %dst, ptr %dst, i32 %c, i64 %n) ret void } ; Negative tests define ptr @unknown_src(ptr %dst, ptr %src) { ; CHECK-LABEL: @unknown_src( ; CHECK-NEXT: [[CALL:%.*]] = call ptr @memccpy(ptr [[DST:%.*]], ptr [[SRC:%.*]], i32 114, i64 12) ; CHECK-NEXT: ret ptr [[CALL]] ; %call = call ptr @memccpy(ptr %dst, ptr %src, i32 114, i64 12) ret ptr %call } define ptr @unknown_stop_char(ptr %dst, i32 %c) { ; CHECK-LABEL: @unknown_stop_char( ; CHECK-NEXT: [[CALL:%.*]] = call ptr @memccpy(ptr [[DST:%.*]], ptr nonnull @hello, i32 [[C:%.*]], i64 12) ; CHECK-NEXT: ret ptr [[CALL]] ; %call = call ptr @memccpy(ptr %dst, ptr @hello, i32 %c, i64 12) ret ptr %call } define ptr @unknown_size_n(ptr %dst, i64 %n) { ; CHECK-LABEL: @unknown_size_n( ; CHECK-NEXT: [[CALL:%.*]] = call ptr @memccpy(ptr [[DST:%.*]], ptr nonnull @hello, i32 114, i64 [[N:%.*]]) ; CHECK-NEXT: ret ptr [[CALL]] ; %call = call ptr @memccpy(ptr %dst, ptr @hello, i32 114, i64 %n) ret ptr %call } define ptr @no_nul_terminator(ptr %dst, i64 %n) { ; CHECK-LABEL: @no_nul_terminator( ; CHECK-NEXT: [[CALL:%.*]] = call ptr @memccpy(ptr [[DST:%.*]], ptr nonnull @StopCharAfterNulTerminator, i32 120, i64 [[N:%.*]]) ; CHECK-NEXT: ret ptr [[CALL]] ; %call = call ptr @memccpy(ptr %dst, ptr @StopCharAfterNulTerminator, i32 120, i64 %n) ; 120 is 'x' ret ptr %call } define ptr @possibly_valid_data_after_array(ptr %dst, i64 %n) { ; CHECK-LABEL: @possibly_valid_data_after_array( ; CHECK-NEXT: [[CALL:%.*]] = call ptr @memccpy(ptr [[DST:%.*]], ptr nonnull @NoNulTerminator, i32 115, i64 [[N:%.*]]) ; CHECK-NEXT: ret ptr [[CALL]] ; %call = call ptr @memccpy(ptr %dst, ptr @NoNulTerminator, i32 115, i64 %n) ; 115 is 's' ret ptr %call } define ptr @possibly_valid_data_after_array2(ptr %dst, i64 %n) { ; CHECK-LABEL: @possibly_valid_data_after_array2( ; CHECK-NEXT: [[CALL:%.*]] = call ptr @memccpy(ptr [[DST:%.*]], ptr nonnull @hello, i32 115, i64 [[N:%.*]]) ; CHECK-NEXT: ret ptr [[CALL]] ; %call = call ptr @memccpy(ptr %dst, ptr @hello, i32 115, i64 %n) ; 115 is 's' ret ptr %call } define ptr @possibly_valid_data_after_array3(ptr %dst) { ; CHECK-LABEL: @possibly_valid_data_after_array3( ; CHECK-NEXT: [[CALL:%.*]] = call ptr @memccpy(ptr [[DST:%.*]], ptr nonnull @hello, i32 115, i64 12) ; CHECK-NEXT: ret ptr [[CALL]] ; %call = call ptr @memccpy(ptr %dst, ptr @hello, i32 115, i64 12) ; 115 is 's' ret ptr %call } define ptr @memccpy_dst_src_same_retval_used(ptr %dst, i32 %c, i64 %n) { ; CHECK-LABEL: @memccpy_dst_src_same_retval_used( ; CHECK-NEXT: [[CALL:%.*]] = call ptr @memccpy(ptr [[DST:%.*]], ptr [[DST]], i32 [[C:%.*]], i64 [[N:%.*]]) ; CHECK-NEXT: ret ptr [[CALL]] ; %call = call ptr @memccpy(ptr %dst, ptr %dst, i32 %c, i64 %n) ret ptr %call } define ptr @memccpy_to_memcpy_musttail(ptr %dst, ptr %x, i32 %y, i64 %z) { ; CHECK-LABEL: @memccpy_to_memcpy_musttail( ; CHECK-NEXT: [[CALL:%.*]] = musttail call ptr @memccpy(ptr [[DST:%.*]], ptr nonnull @hello, i32 114, i64 12) ; CHECK-NEXT: ret ptr [[CALL]] ; %call = musttail call ptr @memccpy(ptr %dst, ptr @hello, i32 114, i64 12) ; 114 is 'r' ret ptr %call } define ptr @memccpy_to_memcpy2_musttail(ptr %dst, ptr %x, i32 %y, i64 %z) { ; CHECK-LABEL: @memccpy_to_memcpy2_musttail( ; CHECK-NEXT: [[CALL:%.*]] = musttail call ptr @memccpy(ptr [[DST:%.*]], ptr nonnull @hello, i32 114, i64 8) ; CHECK-NEXT: ret ptr [[CALL]] ; %call = musttail call ptr @memccpy(ptr %dst, ptr @hello, i32 114, i64 8) ; 114 is 'r' ret ptr %call }