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

pointer correctly.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42918 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2007-10-12 17:49:52 +00:00
parent 48ff282dd4
commit b89f67e3e6

View File

@ -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));