[llvm] r202662 - Give APInt move semantics.
Benjamin Kramer
benny.kra at googlemail.com
Sun Mar 2 12:56:28 PST 2014
Author: d0k
Date: Sun Mar 2 14:56:28 2014
New Revision: 202662
URL: http://llvm.org/viewvc/llvm-project?rev=202662&view=rev
Log:
Give APInt move semantics.
The interaction between defaulted operators and move elision isn't
totally obvious, add a unit test so it doesn't break unintentionally.
Added:
llvm/trunk/unittests/ADT/APSIntTest.cpp
Modified:
llvm/trunk/include/llvm/ADT/APSInt.h
llvm/trunk/unittests/ADT/CMakeLists.txt
Modified: llvm/trunk/include/llvm/ADT/APSInt.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/ADT/APSInt.h?rev=202662&r1=202661&r2=202662&view=diff
==============================================================================
--- llvm/trunk/include/llvm/ADT/APSInt.h (original)
+++ llvm/trunk/include/llvm/ADT/APSInt.h Sun Mar 2 14:56:28 2014
@@ -30,18 +30,12 @@ public:
explicit APSInt(uint32_t BitWidth, bool isUnsigned = true)
: APInt(BitWidth, 0), IsUnsigned(isUnsigned) {}
- explicit APSInt(const APInt &I, bool isUnsigned = true)
- : APInt(I), IsUnsigned(isUnsigned) {}
+ explicit APSInt(APInt I, bool isUnsigned = true)
+ : APInt(std::move(I)), IsUnsigned(isUnsigned) {}
- APSInt &operator=(const APSInt &RHS) {
- APInt::operator=(RHS);
- IsUnsigned = RHS.IsUnsigned;
- return *this;
- }
-
- APSInt &operator=(const APInt &RHS) {
+ APSInt &operator=(APInt RHS) {
// Retain our current sign.
- APInt::operator=(RHS);
+ APInt::operator=(std::move(RHS));
return *this;
}
Added: llvm/trunk/unittests/ADT/APSIntTest.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/unittests/ADT/APSIntTest.cpp?rev=202662&view=auto
==============================================================================
--- llvm/trunk/unittests/ADT/APSIntTest.cpp (added)
+++ llvm/trunk/unittests/ADT/APSIntTest.cpp Sun Mar 2 14:56:28 2014
@@ -0,0 +1,44 @@
+//===- llvm/unittest/ADT/APSIntTest.cpp - APSInt unit tests ---------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/ADT/APSInt.h"
+#include "gtest/gtest.h"
+
+using namespace llvm;
+
+namespace {
+
+TEST(APSIntTest, MoveTest) {
+ APSInt A(32, true);
+ EXPECT_TRUE(A.isUnsigned());
+
+ APSInt B(128, false);
+ A = B;
+ EXPECT_FALSE(A.isUnsigned());
+
+ APSInt C(B);
+ EXPECT_FALSE(C.isUnsigned());
+
+ APInt Wide(256, 0);
+ const uint64_t *Bits = Wide.getRawData();
+ APSInt D(std::move(Wide));
+ EXPECT_TRUE(D.isUnsigned());
+ EXPECT_EQ(Bits, D.getRawData()); // Verify that "Wide" was really moved.
+
+ A = APSInt(64, true);
+ EXPECT_TRUE(A.isUnsigned());
+
+ Wide = APInt(128, 1);
+ Bits = Wide.getRawData();
+ A = std::move(Wide);
+ EXPECT_TRUE(A.isUnsigned());
+ EXPECT_EQ(Bits, A.getRawData()); // Verify that "Wide" was really moved.
+}
+
+}
Modified: llvm/trunk/unittests/ADT/CMakeLists.txt
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/unittests/ADT/CMakeLists.txt?rev=202662&r1=202661&r2=202662&view=diff
==============================================================================
--- llvm/trunk/unittests/ADT/CMakeLists.txt (original)
+++ llvm/trunk/unittests/ADT/CMakeLists.txt Sun Mar 2 14:56:28 2014
@@ -5,6 +5,7 @@ set(LLVM_LINK_COMPONENTS
set(ADTSources
APFloatTest.cpp
APIntTest.cpp
+ APSIntTest.cpp
ArrayRefTest.cpp
BitVectorTest.cpp
DAGDeltaAlgorithmTest.cpp
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