| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ; RUN: opt < %s -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 i8* @memccpy(i8*, i8*, i32, i64) |
| |
| define i8* @memccpy_to_memcpy(i8* %dst) { |
| ; CHECK-LABEL: @memccpy_to_memcpy( |
| ; CHECK-NEXT: [[TMP1:%.*]] = bitcast i8* [[DST:%.*]] to i64* |
| ; CHECK-NEXT: store i64 8245940763182785896, i64* [[TMP1]], align 1 |
| ; CHECK-NEXT: [[TMP2:%.*]] = getelementptr inbounds i8, i8* [[DST]], i64 8 |
| ; CHECK-NEXT: ret i8* [[TMP2]] |
| ; |
| %call = call i8* @memccpy(i8* %dst, i8* getelementptr inbounds ([11 x i8], [11 x i8]* @hello, i64 0, i64 0), i32 114, i64 12) ; 114 is 'r' |
| ret i8* %call |
| } |
| |
| define i8* @memccpy_to_memcpy2(i8* %dst) { |
| ; CHECK-LABEL: @memccpy_to_memcpy2( |
| ; CHECK-NEXT: [[TMP1:%.*]] = bitcast i8* [[DST:%.*]] to i64* |
| ; CHECK-NEXT: store i64 8245940763182785896, i64* [[TMP1]], align 1 |
| ; CHECK-NEXT: [[TMP2:%.*]] = getelementptr inbounds i8, i8* [[DST]], i64 8 |
| ; CHECK-NEXT: ret i8* [[TMP2]] |
| ; |
| %call = call i8* @memccpy(i8* %dst, i8* getelementptr inbounds ([11 x i8], [11 x i8]* @hello, i64 0, i64 0), i32 114, i64 8); ; 114 is 'r' |
| ret i8* %call |
| } |
| |
| define void @memccpy_to_memcpy3(i8* %dst) { |
| ; CHECK-LABEL: @memccpy_to_memcpy3( |
| ; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* noundef nonnull align 1 dereferenceable(5) [[DST:%.*]], i8* noundef nonnull align 1 dereferenceable(5) getelementptr inbounds ([11 x i8], [11 x i8]* @hello, i64 0, i64 0), i64 5, i1 false) |
| ; CHECK-NEXT: ret void |
| ; |
| %call = call i8* @memccpy(i8* %dst, i8* getelementptr inbounds ([11 x i8], [11 x i8]* @hello, i64 0, i64 0), i32 111, i64 10) ; 111 is 'o' |
| ret void |
| } |
| |
| define void @memccpy_to_memcpy4(i8* %dst) { |
| ; CHECK-LABEL: @memccpy_to_memcpy4( |
| ; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* noundef nonnull align 1 dereferenceable(11) [[DST:%.*]], i8* noundef nonnull align 1 dereferenceable(11) getelementptr inbounds ([11 x i8], [11 x i8]* @hello, i64 0, i64 0), i64 11, i1 false) |
| ; CHECK-NEXT: ret void |
| ; |
| %call = call i8* @memccpy(i8* %dst, i8* getelementptr inbounds ([11 x i8], [11 x i8]* @hello, i64 0, i64 0), i32 0, i64 12) |
| ret void |
| } |
| |
| define i8* @memccpy_to_memcpy5(i8* %dst) { |
| ; CHECK-LABEL: @memccpy_to_memcpy5( |
| ; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* noundef nonnull align 1 dereferenceable(7) [[DST:%.*]], i8* noundef nonnull align 1 dereferenceable(7) getelementptr inbounds ([11 x i8], [11 x i8]* @hello, i64 0, i64 0), i64 7, i1 false) |
| ; CHECK-NEXT: ret i8* null |
| ; |
| %call = call i8* @memccpy(i8* %dst, i8* getelementptr inbounds ([11 x i8], [11 x i8]* @hello, i64 0, i64 0), i32 114, i64 7) |
| ret i8* %call |
| } |
| |
| define i8* @memccpy_to_memcpy6(i8* %dst) { |
| ; CHECK-LABEL: @memccpy_to_memcpy6( |
| ; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* noundef nonnull align 1 dereferenceable(6) [[DST:%.*]], i8* noundef nonnull align 1 dereferenceable(6) getelementptr inbounds ([11 x i8], [11 x i8]* @hello, i64 0, i64 0), i64 6, i1 false) |
| ; CHECK-NEXT: ret i8* null |
| ; |
| %call = call i8* @memccpy(i8* %dst, i8* getelementptr inbounds ([11 x i8], [11 x i8]* @hello, i64 0, i64 0), i32 114, i64 6); |
| ret i8* %call |
| } |
| |
| define i8* @memccpy_to_memcpy7(i8* %dst) { |
| ; CHECK-LABEL: @memccpy_to_memcpy7( |
| ; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* noundef nonnull align 1 dereferenceable(5) [[DST:%.*]], i8* noundef nonnull align 1 dereferenceable(5) getelementptr inbounds ([11 x i8], [11 x i8]* @hello, i64 0, i64 0), i64 5, i1 false) |
| ; CHECK-NEXT: ret i8* null |
| ; |
| %call = call i8* @memccpy(i8* %dst, i8* getelementptr inbounds ([11 x i8], [11 x i8]* @hello, i64 0, i64 0), i32 115, i64 5) ; 115 is 's' |
| ret i8* %call |
| } |
| |
| define i8* @memccpy_to_memcpy8(i8* %dst) { |
| ; CHECK-LABEL: @memccpy_to_memcpy8( |
| ; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* noundef nonnull align 1 dereferenceable(11) [[DST:%.*]], i8* noundef nonnull align 1 dereferenceable(11) getelementptr inbounds ([11 x i8], [11 x i8]* @hello, i64 0, i64 0), i64 11, i1 false) |
| ; CHECK-NEXT: ret i8* null |
| ; |
| %call = call i8* @memccpy(i8* %dst, i8* getelementptr inbounds ([11 x i8], [11 x i8]* @hello, i64 0, i64 0), i32 115, i64 11) ; 115 is 's' |
| ret i8* %call |
| } |
| |
| define i8* @memccpy_to_memcpy9(i8* %dst, i64 %n) { |
| ; CHECK-LABEL: @memccpy_to_memcpy9( |
| ; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* noundef nonnull align 1 dereferenceable(12) [[DST:%.*]], i8* noundef nonnull align 1 dereferenceable(12) getelementptr inbounds ([12 x i8], [12 x i8]* @StopCharAfterNulTerminator, i64 0, i64 0), i64 12, i1 false) |
| ; CHECK-NEXT: [[TMP1:%.*]] = getelementptr inbounds i8, i8* [[DST]], i64 12 |
| ; CHECK-NEXT: ret i8* [[TMP1]] |
| ; |
| %call = call i8* @memccpy(i8* %dst, i8* getelementptr inbounds ([12 x i8], [12 x i8]* @StopCharAfterNulTerminator, i64 0, i64 0), i32 120, i64 15) ; 120 is 'x' |
| ret i8* %call |
| } |
| |
| define i8* @memccpy_to_memcpy10(i8* %dst, i64 %n) { |
| ; CHECK-LABEL: @memccpy_to_memcpy10( |
| ; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* noundef nonnull align 1 dereferenceable(11) [[DST:%.*]], i8* noundef nonnull align 1 dereferenceable(11) getelementptr inbounds ([14 x i8], [14 x i8]* @StringWithEOF, i64 0, i64 0), i64 11, i1 false) |
| ; CHECK-NEXT: [[TMP1:%.*]] = getelementptr inbounds i8, i8* [[DST]], i64 11 |
| ; CHECK-NEXT: ret i8* [[TMP1]] |
| ; |
| %call = call i8* @memccpy(i8* %dst, i8* getelementptr inbounds ([14 x i8], [14 x i8]* @StringWithEOF, i64 0, i64 0), i32 255, i64 15) |
| ret i8* %call |
| } |
| |
| define i8* @memccpy_to_memcpy11(i8* %dst, i64 %n) { |
| ; CHECK-LABEL: @memccpy_to_memcpy11( |
| ; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* noundef nonnull align 1 dereferenceable(11) [[DST:%.*]], i8* noundef nonnull align 1 dereferenceable(11) getelementptr inbounds ([14 x i8], [14 x i8]* @StringWithEOF, i64 0, i64 0), i64 11, i1 false) |
| ; CHECK-NEXT: [[TMP1:%.*]] = getelementptr inbounds i8, i8* [[DST]], i64 11 |
| ; CHECK-NEXT: ret i8* [[TMP1]] |
| ; |
| %call = call i8* @memccpy(i8* %dst, i8* getelementptr inbounds ([14 x i8], [14 x i8]* @StringWithEOF, i64 0, i64 0), i32 -1, i64 15) |
| ret i8* %call |
| } |
| |
| define i8* @memccpy_to_memcpy12(i8* %dst, i64 %n) { |
| ; CHECK-LABEL: @memccpy_to_memcpy12( |
| ; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* noundef nonnull align 1 dereferenceable(11) [[DST:%.*]], i8* noundef nonnull align 1 dereferenceable(11) getelementptr inbounds ([14 x i8], [14 x i8]* @StringWithEOF, i64 0, i64 0), i64 11, i1 false) |
| ; CHECK-NEXT: [[TMP1:%.*]] = getelementptr inbounds i8, i8* [[DST]], i64 11 |
| ; CHECK-NEXT: ret i8* [[TMP1]] |
| ; |
| %call = call i8* @memccpy(i8* %dst, i8* getelementptr inbounds ([14 x i8], [14 x i8]* @StringWithEOF, i64 0, i64 0), i32 1023, i64 15) |
| ret i8* %call |
| } |
| |
| define i8* @memccpy_to_null(i8* %dst, i8* %src, i32 %c) { |
| ; CHECK-LABEL: @memccpy_to_null( |
| ; CHECK-NEXT: ret i8* null |
| ; |
| %call = call i8* @memccpy(i8* %dst, i8* %src, i32 %c, i64 0) |
| ret i8* %call |
| } |
| |
| define void @memccpy_dst_src_same_retval_unused(i8* %dst, i32 %c, i64 %n) { |
| ; CHECK-LABEL: @memccpy_dst_src_same_retval_unused( |
| ; CHECK-NEXT: ret void |
| ; |
| %call = call i8* @memccpy(i8* %dst, i8* %dst, i32 %c, i64 %n) |
| ret void |
| } |
| |
| ; Negative tests |
| define i8* @unknown_src(i8* %dst, i8* %src) { |
| ; CHECK-LABEL: @unknown_src( |
| ; CHECK-NEXT: [[CALL:%.*]] = call i8* @memccpy(i8* [[DST:%.*]], i8* [[SRC:%.*]], i32 114, i64 12) |
| ; CHECK-NEXT: ret i8* [[CALL]] |
| ; |
| %call = call i8* @memccpy(i8* %dst, i8* %src, i32 114, i64 12) |
| ret i8* %call |
| } |
| |
| define i8* @unknown_stop_char(i8* %dst, i32 %c) { |
| ; CHECK-LABEL: @unknown_stop_char( |
| ; CHECK-NEXT: [[CALL:%.*]] = call i8* @memccpy(i8* [[DST:%.*]], i8* getelementptr inbounds ([11 x i8], [11 x i8]* @hello, i64 0, i64 0), i32 [[C:%.*]], i64 12) |
| ; CHECK-NEXT: ret i8* [[CALL]] |
| ; |
| %call = call i8* @memccpy(i8* %dst, i8* getelementptr inbounds ([11 x i8], [11 x i8]* @hello, i64 0, i64 0), i32 %c, i64 12) |
| ret i8* %call |
| } |
| |
| define i8* @unknown_size_n(i8* %dst, i64 %n) { |
| ; CHECK-LABEL: @unknown_size_n( |
| ; CHECK-NEXT: [[CALL:%.*]] = call i8* @memccpy(i8* [[DST:%.*]], i8* getelementptr inbounds ([11 x i8], [11 x i8]* @hello, i64 0, i64 0), i32 114, i64 [[N:%.*]]) |
| ; CHECK-NEXT: ret i8* [[CALL]] |
| ; |
| %call = call i8* @memccpy(i8* %dst, i8* getelementptr inbounds ([11 x i8], [11 x i8]* @hello, i64 0, i64 0), i32 114, i64 %n) |
| ret i8* %call |
| } |
| |
| define i8* @no_nul_terminator(i8* %dst, i64 %n) { |
| ; CHECK-LABEL: @no_nul_terminator( |
| ; CHECK-NEXT: [[CALL:%.*]] = call i8* @memccpy(i8* [[DST:%.*]], i8* getelementptr inbounds ([12 x i8], [12 x i8]* @StopCharAfterNulTerminator, i64 0, i64 0), i32 120, i64 [[N:%.*]]) |
| ; CHECK-NEXT: ret i8* [[CALL]] |
| ; |
| %call = call i8* @memccpy(i8* %dst, i8* getelementptr inbounds ([12 x i8], [12 x i8]* @StopCharAfterNulTerminator, i64 0, i64 0), i32 120, i64 %n) ; 120 is 'x' |
| ret i8* %call |
| } |
| |
| define i8* @possibly_valid_data_after_array(i8* %dst, i64 %n) { |
| ; CHECK-LABEL: @possibly_valid_data_after_array( |
| ; CHECK-NEXT: [[CALL:%.*]] = call i8* @memccpy(i8* [[DST:%.*]], i8* getelementptr inbounds ([10 x i8], [10 x i8]* @NoNulTerminator, i64 0, i64 0), i32 115, i64 [[N:%.*]]) |
| ; CHECK-NEXT: ret i8* [[CALL]] |
| ; |
| %call = call i8* @memccpy(i8* %dst, i8* getelementptr inbounds ([10 x i8], [10 x i8]* @NoNulTerminator, i64 0, i64 0), i32 115, i64 %n) ; 115 is 's' |
| ret i8* %call |
| } |
| |
| define i8* @possibly_valid_data_after_array2(i8* %dst, i64 %n) { |
| ; CHECK-LABEL: @possibly_valid_data_after_array2( |
| ; CHECK-NEXT: [[CALL:%.*]] = call i8* @memccpy(i8* [[DST:%.*]], i8* getelementptr inbounds ([11 x i8], [11 x i8]* @hello, i64 0, i64 0), i32 115, i64 [[N:%.*]]) |
| ; CHECK-NEXT: ret i8* [[CALL]] |
| ; |
| %call = call i8* @memccpy(i8* %dst, i8* getelementptr inbounds ([11 x i8], [11 x i8]* @hello, i64 0, i64 0), i32 115, i64 %n) ; 115 is 's' |
| ret i8* %call |
| } |
| |
| define i8* @possibly_valid_data_after_array3(i8* %dst) { |
| ; CHECK-LABEL: @possibly_valid_data_after_array3( |
| ; CHECK-NEXT: [[CALL:%.*]] = call i8* @memccpy(i8* [[DST:%.*]], i8* getelementptr inbounds ([11 x i8], [11 x i8]* @hello, i64 0, i64 0), i32 115, i64 12) |
| ; CHECK-NEXT: ret i8* [[CALL]] |
| ; |
| %call = call i8* @memccpy(i8* %dst, i8* getelementptr inbounds ([11 x i8], [11 x i8]* @hello, i64 0, i64 0), i32 115, i64 12) ; 115 is 's' |
| ret i8* %call |
| } |
| |
| define i8* @memccpy_dst_src_same_retval_used(i8* %dst, i32 %c, i64 %n) { |
| ; CHECK-LABEL: @memccpy_dst_src_same_retval_used( |
| ; CHECK-NEXT: [[CALL:%.*]] = call i8* @memccpy(i8* [[DST:%.*]], i8* [[DST]], i32 [[C:%.*]], i64 [[N:%.*]]) |
| ; CHECK-NEXT: ret i8* [[CALL]] |
| ; |
| %call = call i8* @memccpy(i8* %dst, i8* %dst, i32 %c, i64 %n) |
| ret i8* %call |
| } |