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Fix the msvc 2010 build.

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The Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 16.00.30319.01
implements parts of C++0x based on the draft standard. An old version of
the draft had a bug that makes std::pair<T1*, T2*>(something, 0) fail to
compile. This is because the template<class U, class V> pair(U&& x, V&& y)
constructor is selected, even though it later fails to implicitly convert
U and V to frist_type and second_type.

This has been fixed in n3090, but it seems that Microsoft is not going to
update msvc.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111535 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Michael J. Spencer 2010-08-19 18:16:39 +00:00
parent b1508d1889
commit 6715be20e2
1 changed files with 19 additions and 2 deletions
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21
lib/CodeGen/SplitKit.cpp
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@ -352,7 +352,16 @@ VNInfo *LiveIntervalMap::defValue(const VNInfo *ParentVNI, SlotIndex Idx) {
// This is a complex def. Mark with a NULL in valueMap.
VNInfo *OldVNI =
valueMap_.insert(ValueMap::value_type(ParentVNI, 0)).first->second;
valueMap_.insert(
ValueMap::value_type(ParentVNI, static_cast<VNInfo *>(0))).first->second;
// The static_cast<VNInfo *> is only needed to work around a bug in an
// old version of the C++0x standard which the following compilers
// implemented and have yet to fix:
//
// Microsoft Visual Studio 2010 Version 10.0.30319.1 RTMRel
// Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 16.00.30319.01
//
// If/When we move to C++0x, this can be replaced by nullptr.
(void)OldVNI;
assert(OldVNI == 0 && "Simple/Complex values mixed");
@ -371,7 +380,15 @@ VNInfo *LiveIntervalMap::mapValue(const VNInfo *ParentVNI, SlotIndex Idx) {
// Use insert for lookup, so we can add missing values with a second lookup.
std::pair<ValueMap::iterator,bool> InsP =
valueMap_.insert(ValueMap::value_type(ParentVNI, 0));
valueMap_.insert(ValueMap::value_type(ParentVNI, static_cast<VNInfo *>(0)));
// The static_cast<VNInfo *> is only needed to work around a bug in an
// old version of the C++0x standard which the following compilers
// implemented and have yet to fix:
//
// Microsoft Visual Studio 2010 Version 10.0.30319.1 RTMRel
// Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 16.00.30319.01
//
// If/When we move to C++0x, this can be replaced by nullptr.
// This was an unknown value. Create a simple mapping.
if (InsP.second)