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| author | Chris Lattner <sabre@nondot.org> | 2003-10-06 15:23:43 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2003-10-06 15:23:43 +0000 |
| commit | 5f92e2b11f68624f9003e710f44e3bc324cbf89a (patch) | |
| tree | e5d94cf5d4818c88a23f50a92090fd91cb5a379c /lib/Transforms/Utils/ValueMapper.cpp | |
| parent | d5a310e4b3251410d4afd58ccea5ec7f0cb13d5f (diff) | |
Avoid doing pointless work. Amazingly, this makes us go faster.
Running the inliner on 252.eon used to take 48.4763s, now it takes 14.4148s.
In release mode, it went from taking 25.8741s to taking 11.5712s.
This also fixes a FIXME.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@8890 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Transforms/Utils/ValueMapper.cpp')
| -rw-r--r-- | lib/Transforms/Utils/ValueMapper.cpp | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/lib/Transforms/Utils/ValueMapper.cpp b/lib/Transforms/Utils/ValueMapper.cpp index 484765a7e2..d79c21f474 100644 --- a/lib/Transforms/Utils/ValueMapper.cpp +++ b/lib/Transforms/Utils/ValueMapper.cpp @@ -13,6 +13,11 @@ Value *MapValue(const Value *V, std::map<const Value*, Value*> &VM) { Value *&VMSlot = VM[V]; if (VMSlot) return VMSlot; // Does it exist in the map yet? + // Global values do not need to be seeded into the ValueMap if they are using + // the identity mapping. + if (isa<GlobalValue>(V)) + return VMSlot = const_cast<Value*>(V); + if (Constant *C = const_cast<Constant*>(dyn_cast<Constant>(V))) { if (isa<ConstantIntegral>(C) || isa<ConstantFP>(C) || isa<ConstantPointerNull>(C)) |