1 | //===- Diagnostic.cpp - Dialect unit tests -------------------------------===// |
2 | // |
3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
4 | // See https://llvm.org/LICENSE.txt for license information. |
5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
6 | // |
7 | //===----------------------------------------------------------------------===// |
8 | |
9 | #include "mlir/IR/Diagnostics.h" |
10 | #include "mlir/Support/TypeID.h" |
11 | #include "gtest/gtest.h" |
12 | |
13 | using namespace mlir; |
14 | using namespace mlir::detail; |
15 | |
16 | namespace { |
17 | |
18 | TEST(DiagnosticLifetime, TestCopiesConstCharStar) { |
19 | const auto *expectedMessage = "Error 1, don't mutate this" ; |
20 | |
21 | // Copy expected message into a mutable container, and call the constructor. |
22 | std::string myStr(expectedMessage); |
23 | |
24 | mlir::MLIRContext context; |
25 | Diagnostic diagnostic(mlir::UnknownLoc::get(&context), |
26 | DiagnosticSeverity::Note); |
27 | diagnostic << myStr.c_str(); |
28 | |
29 | // Mutate underlying pointer, but ensure diagnostic still has orig. message |
30 | myStr[0] = '^'; |
31 | |
32 | std::string resultMessage; |
33 | llvm::raw_string_ostream stringStream(resultMessage); |
34 | diagnostic.print(os&: stringStream); |
35 | ASSERT_STREQ(expectedMessage, resultMessage.c_str()); |
36 | } |
37 | |
38 | TEST(DiagnosticLifetime, TestLazyCopyStringLiteral) { |
39 | char charArr[21] = "Error 1, mutate this" ; |
40 | mlir::MLIRContext context; |
41 | Diagnostic diagnostic(mlir::UnknownLoc::get(&context), |
42 | DiagnosticSeverity::Note); |
43 | |
44 | // Diagnostic contains optimization which assumes string literals are |
45 | // represented by `const char[]` type. This is imperfect as we can sometimes |
46 | // trick the type system as seen below. |
47 | // |
48 | // Still we use this to check the diagnostic is lazily storing the pointer. |
49 | auto addToDiagnosticAsConst = [&diagnostic](const char(&charArr)[21]) { |
50 | diagnostic << charArr; |
51 | }; |
52 | addToDiagnosticAsConst(charArr); |
53 | |
54 | // Mutate the underlying pointer and ensure the string does change |
55 | charArr[0] = '^'; |
56 | |
57 | std::string resultMessage; |
58 | llvm::raw_string_ostream stringStream(resultMessage); |
59 | diagnostic.print(os&: stringStream); |
60 | ASSERT_STREQ("^rror 1, mutate this" , resultMessage.c_str()); |
61 | } |
62 | |
63 | } // namespace |
64 | |