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Correct the allocation size for CCState's UsedRegs member, which

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only needs one bit for each register. UsedRegs is a SmallVector
sized at 16, so this eliminates a heap allocation/free for every
call and return processed by Legalize on most targets.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52915 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman 2008-06-30 20:25:31 +00:00
parent ebd69421a2
commit 117b64b3f8
1 changed files with 1 additions and 1 deletions
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2
lib/CodeGen/SelectionDAG/CallingConvLower.cpp
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@ -26,7 +26,7 @@ CCState::CCState(unsigned CC, bool isVarArg, const TargetMachine &tm,
// No stack is used. // No stack is used.
StackOffset = 0; StackOffset = 0;
UsedRegs.resize(TRI.getNumRegs()); UsedRegs.resize((TRI.getNumRegs()+31)/32);
} }
// HandleByVal - Allocate a stack slot large enough to pass an argument by // HandleByVal - Allocate a stack slot large enough to pass an argument by