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VMCore: add assert for miscompile

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See PR11652. Trying to add this assert to
setSubclassData() itself actually prevented
the miscompile entirely, so it has to be here.

This makes the source of the bug more obvious
than the other asserts triggering later on did.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@147390 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dylan Noblesmith 2011-12-31 13:58:58 +00:00
parent ce8524c016
commit ccc9a59614
1 changed files with 5 additions and 0 deletions
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5
lib/VMCore/Type.cpp
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@ -707,7 +707,12 @@ PointerType *PointerType::get(Type *EltTy, unsigned AddressSpace) {
PointerType::PointerType(Type *E, unsigned AddrSpace)
: SequentialType(PointerTyID, E) {
#ifndef NDEBUG
const unsigned oldNCT = NumContainedTys;
#endif
setSubclassData(AddrSpace);
// Check for miscompile. PR11652.
assert(oldNCT == NumContainedTys && "bitfield written out of bounds?");
}
PointerType *Type::getPointerTo(unsigned addrs) {