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Revert 106528. It is causing self host failures.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106529 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -21,15 +21,17 @@
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using namespace llvm;
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Value *llvm::MapValue(const Value *V, ValueToValueMapTy &VM) {
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ValueToValueMapTy::iterator VMI = VM.find(V);
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if (VMI != VM.end())
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return VMI->second;
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Value *&VMSlot = VM[V];
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if (VMSlot) return VMSlot; // Does it exist in the map yet?
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// NOTE: VMSlot can be invalidated by any reference to VM, which can grow the
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// DenseMap. This includes any recursive calls to MapValue.
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// Global values and non-function-local metadata do not need to be seeded into
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// the ValueMap if they are using the identity mapping.
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if (isa<GlobalValue>(V) || isa<InlineAsm>(V) || isa<MDString>(V) ||
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(isa<MDNode>(V) && !cast<MDNode>(V)->isFunctionLocal()))
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return VM[V] = const_cast<Value*>(V);
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return VMSlot = const_cast<Value*>(V);
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if (const MDNode *MD = dyn_cast<MDNode>(V)) {
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SmallVector<Value*, 4> Elts;
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@ -44,7 +46,7 @@ Value *llvm::MapValue(const Value *V, ValueToValueMapTy &VM) {
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if (isa<ConstantInt>(C) || isa<ConstantFP>(C) ||
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isa<ConstantPointerNull>(C) || isa<ConstantAggregateZero>(C) ||
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isa<UndefValue>(C) || isa<MDString>(C))
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return VM[V] = C; // Primitive constants map directly
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return VMSlot = C; // Primitive constants map directly
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if (ConstantArray *CA = dyn_cast<ConstantArray>(C)) {
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for (User::op_iterator b = CA->op_begin(), i = b, e = CA->op_end();
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