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Switch a worklist in CodeGenPrepare to SmallVector and increase the inline

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capacity on the Visited SmallPtrSet. On 403.gcc, this is about a 4.5% speedup of
CodeGenPrepare time (which itself is 10% of time spent in the backend).

This is progress towards PR8889.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122741 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Cameron Zwarich 2011-01-03 06:33:01 +00:00
parent db5f5e64fe
commit 7cb4fa20b5
1 changed files with 2 additions and 2 deletions
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4
lib/Transforms/Scalar/CodeGenPrepare.cpp
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@ -623,8 +623,8 @@ bool CodeGenPrepare::OptimizeMemoryInst(Instruction *MemoryInst, Value *Addr,
// Try to collapse single-value PHI nodes. This is necessary to undo
// unprofitable PRE transformations.
std::vector<Value*> worklist;
SmallPtrSet<Value*, 4> Visited;
SmallVector<Value*, 8> worklist;
SmallPtrSet<Value*, 16> Visited;
worklist.push_back(Addr);
// Use a worklist to iteratively look through PHI nodes, and ensure that