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Make this compute the correct offset, handling alignment of the element 

pointer correctly.

llvm-svn: 42918
This commit is contained in:
Chris Lattner 2007-10-12 17:49:52 +00:00
parent 431ef632cb
commit 4c461477bd
1 changed files with 3 additions and 2 deletions
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5
llvm/include/llvm/ADT/StringMap.h
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@ -171,8 +171,9 @@ public:
/// GetStringMapEntryFromValue - Given a value that is known to be embedded
/// into a StringMapEntry, return the StringMapEntry itself.
static StringMapEntry &GetStringMapEntryFromValue(ValueTy &V) {
return *reinterpret_cast<StringMapEntry*>(reinterpret_cast<char*>(&V) -
sizeof(StringMapEntryBase));
StringMapEntry *EPtr = 0;
char *Ptr = reinterpret_cast<char*>(&V) - (intptr_t)&EPtr->Val;
return *reinterpret_cast<StringMapEntry*>(Ptr);
}
static const StringMapEntry &GetStringMapEntryFromValue(const ValueTy &V) {
return GetStringMapEntryFromValue(const_cast<ValueTy&>(V));