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Revert "Verifier: Check for incompatible bit piece expressions"

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This reverts commit r234698.

This caused a use-after-free: `QueuedBitPieceExpressions` holds onto
references to `DbgInfoIntrinsic`s and references them past where they're
deleted (this is because the verifier is run as a function pass, and
then `verifyTypeRefs()` is called during `doFinalization()`).

I'll include a reduced crasher for `llc` when I recommit the check.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@234717 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Duncan P. N. Exon Smith
2015-04-13 00:06:28 +00:00
parent b7239d3aa5
commit ea8c159524
4 changed files with 32 additions and 90 deletions
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13
lib/IR/DebugInfo.cpp
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@@ -33,6 +33,19 @@
using namespace llvm;
using namespace llvm::dwarf;
/// \brief Return the size reported by the variable's type.
unsigned DIVariable::getSizeInBits(const DITypeIdentifierMap &Map) {
DIType Ty = getType().resolve(Map);
// Follow derived types until we reach a type that
// reports back a size.
while (isa<MDDerivedType>(Ty) && !Ty.getSizeInBits()) {
DIDerivedType DT = cast<MDDerivedType>(Ty);
Ty = DT.getTypeDerivedFrom().resolve(Map);
}
assert(Ty.getSizeInBits() && "type with size 0");
return Ty.getSizeInBits();
}
//===----------------------------------------------------------------------===//
// Simple Descriptor Constructors and other Methods
//===----------------------------------------------------------------------===//