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Revert 106528. It is causing self host failures.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106529 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Devang Patel
2010-06-22 06:14:09 +00:00
parent 52e0612f7d
commit e4acff8720
1 changed files with 7 additions and 5 deletions
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12
lib/Transforms/Utils/ValueMapper.cpp
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@@ -21,15 +21,17 @@
using namespace llvm; using namespace llvm;
Value *llvm::MapValue(const Value *V, ValueToValueMapTy &VM) { Value *llvm::MapValue(const Value *V, ValueToValueMapTy &VM) {
ValueToValueMapTy::iterator VMI = VM.find(V); Value *&VMSlot = VM[V];
if (VMI != VM.end()) if (VMSlot) return VMSlot; // Does it exist in the map yet?
return VMI->second;
// NOTE: VMSlot can be invalidated by any reference to VM, which can grow the
// DenseMap. This includes any recursive calls to MapValue.
// Global values and non-function-local metadata do not need to be seeded into // Global values and non-function-local metadata do not need to be seeded into
// the ValueMap if they are using the identity mapping. // the ValueMap if they are using the identity mapping.
if (isa<GlobalValue>(V) || isa<InlineAsm>(V) || isa<MDString>(V) || if (isa<GlobalValue>(V) || isa<InlineAsm>(V) || isa<MDString>(V) ||
(isa<MDNode>(V) && !cast<MDNode>(V)->isFunctionLocal())) (isa<MDNode>(V) && !cast<MDNode>(V)->isFunctionLocal()))
return VM[V] = const_cast<Value*>(V); return VMSlot = const_cast<Value*>(V);
if (const MDNode *MD = dyn_cast<MDNode>(V)) { if (const MDNode *MD = dyn_cast<MDNode>(V)) {
SmallVector<Value*, 4> Elts; SmallVector<Value*, 4> Elts;
@@ -44,7 +46,7 @@ Value *llvm::MapValue(const Value *V, ValueToValueMapTy &VM) {
if (isa<ConstantInt>(C) || isa<ConstantFP>(C) || if (isa<ConstantInt>(C) || isa<ConstantFP>(C) ||
isa<ConstantPointerNull>(C) || isa<ConstantAggregateZero>(C) || isa<ConstantPointerNull>(C) || isa<ConstantAggregateZero>(C) ||
isa<UndefValue>(C) || isa<MDString>(C)) isa<UndefValue>(C) || isa<MDString>(C))
return VM[V] = C; // Primitive constants map directly return VMSlot = C; // Primitive constants map directly
if (ConstantArray *CA = dyn_cast<ConstantArray>(C)) { if (ConstantArray *CA = dyn_cast<ConstantArray>(C)) {
for (User::op_iterator b = CA->op_begin(), i = b, e = CA->op_end(); for (User::op_iterator b = CA->op_begin(), i = b, e = CA->op_end();