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MC: Don't assume incoming StringRef's are null terminated.

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This can happen when processing command line arguments, which
are often stored as std::string's and later turned into
StringRef's via std::string::data().  Unfortunately this
is not guaranteed to return a null-terminated string
until C++11, causing breakage on platforms that don't do this.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@192558 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Will Dietz
2013-10-13 22:09:26 +00:00
parent cf1f4c7dd1
commit 4df7c5baa1
3 changed files with 8 additions and 13 deletions
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4
lib/MC/MCSubtargetInfo.cpp
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@@ -96,10 +96,8 @@ MCSubtargetInfo::getSchedModelForCPU(StringRef CPU) const {
#endif
// Find entry
SubtargetInfoKV KV;
KV.Key = CPU.data();
const SubtargetInfoKV *Found =
std::lower_bound(ProcSchedModels, ProcSchedModels+NumProcs, KV);
std::lower_bound(ProcSchedModels, ProcSchedModels+NumProcs, CPU);
if (Found == ProcSchedModels+NumProcs || StringRef(Found->Key) != CPU) {
errs() << "'" << CPU
<< "' is not a recognized processor for this target"