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Fix UBSan bootstrap: don't bind reference to nullptr.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@224751 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Alexey Samsonov 2014-12-23 04:15:47 +00:00
parent d4510005df
commit acd25d2481
1 changed files with 4 additions and 2 deletions
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6
include/llvm/CodeGen/RegAllocPBQP.h
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@ -192,8 +192,10 @@ public:
: RS(Other.RS), NumOpts(Other.NumOpts), DeniedOpts(Other.DeniedOpts),
OptUnsafeEdges(new unsigned[NumOpts]), VReg(Other.VReg),
AllowedRegs(Other.AllowedRegs) {
std::copy(&Other.OptUnsafeEdges[0], &Other.OptUnsafeEdges[NumOpts],
&OptUnsafeEdges[0]);
if (NumOpts > 0) {
std::copy(&Other.OptUnsafeEdges[0], &Other.OptUnsafeEdges[NumOpts],
&OptUnsafeEdges[0]);
}
}
// FIXME: Re-implementing default behavior to work around MSVC. Remove once