[PATCH] D86053: [APInt] Allow self-assignment with libstdc++
Vitaly Buka via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Wed Aug 19 19:31:37 PDT 2020
vitalybuka updated this revision to Diff 286703.
vitalybuka added a comment.
Use EXPENSIVE_CHECKS
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D86053/new/
https://reviews.llvm.org/D86053
Files:
llvm/include/llvm/ADT/APInt.h
llvm/unittests/ADT/APIntTest.cpp
Index: llvm/unittests/ADT/APIntTest.cpp
===================================================================
--- llvm/unittests/ADT/APIntTest.cpp
+++ llvm/unittests/ADT/APIntTest.cpp
@@ -1783,8 +1783,9 @@
}
}
-// Test that self-move works, but only when we're using MSVC.
-#if defined(_MSC_VER)
+// Test that self-move works with EXPENSIVE_CHECKS. It calls std::shuffle which
+// does self-move on some platforms.
+#ifdef EXPENSIVE_CHECKS
#if defined(__clang__)
// Disable the pragma warning from versions of Clang without -Wself-move
#pragma clang diagnostic push
@@ -1813,7 +1814,7 @@
#pragma clang diagnostic pop
#pragma clang diagnostic pop
#endif
-#endif // _MSC_VER
+#endif // EXPENSIVE_CHECKS
TEST(APIntTest, byteSwap) {
EXPECT_EQ(0x00000000, APInt(16, 0x0000).byteSwap());
Index: llvm/include/llvm/ADT/APInt.h
===================================================================
--- llvm/include/llvm/ADT/APInt.h
+++ llvm/include/llvm/ADT/APInt.h
@@ -765,8 +765,8 @@
/// Move assignment operator.
APInt &operator=(APInt &&that) {
-#ifdef _MSC_VER
- // The MSVC std::shuffle implementation still does self-assignment.
+#ifdef EXPENSIVE_CHECKS
+ // Some std::shuffle implementations still do self-assignment.
if (this == &that)
return *this;
#endif
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