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Revert "Fix UBSan report in StringMap implementation."

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This reverts commit r223402. Some bots fail with -Winvalid-offsetof
warning.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@223407 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Alexey Samsonov 2014-12-04 23:00:50 +00:00
parent 9e8083744d
commit 59d867405a
1 changed files with 4 additions and 1 deletions
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5
include/llvm/ADT/StringMap.h
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@ -182,7 +182,10 @@ public:
/// GetStringMapEntryFromValue - Given a value that is known to be embedded /// GetStringMapEntryFromValue - Given a value that is known to be embedded
/// into a StringMapEntry, return the StringMapEntry itself. /// into a StringMapEntry, return the StringMapEntry itself.
static StringMapEntry &GetStringMapEntryFromValue(ValueTy &V) { static StringMapEntry &GetStringMapEntryFromValue(ValueTy &V) {
char *Ptr = reinterpret_cast<char *>(&V) - offsetof(StringMapEntry, second); StringMapEntry *EPtr = 0;
char *Ptr = reinterpret_cast<char*>(&V) -
(reinterpret_cast<char*>(&EPtr->second) -
reinterpret_cast<char*>(EPtr));
return *reinterpret_cast<StringMapEntry*>(Ptr); return *reinterpret_cast<StringMapEntry*>(Ptr);
} }
static const StringMapEntry &GetStringMapEntryFromValue(const ValueTy &V) { static const StringMapEntry &GetStringMapEntryFromValue(const ValueTy &V) {