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Don't store COPY pointers in VNInfo.

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If a value is defined by a COPY, that instuction can easily and cheaply
be found by getInstructionFromIndex(VNI->def).

This reduces the size of VNInfo from 24 to 16 bytes, and improves
llc compile time by 3%.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@149763 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen
2012-02-04 05:20:49 +00:00
parent edc8db87dc
commit 3b1088a2cc
9 changed files with 52 additions and 119 deletions
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3
include/llvm/CodeGen/LiveIntervalAnalysis.h
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@@ -298,8 +298,7 @@ namespace llvm {
void handlePhysicalRegisterDef(MachineBasicBlock* mbb,
MachineBasicBlock::iterator mi,
SlotIndex MIIdx, MachineOperand& MO,
LiveInterval &interval,
MachineInstr *CopyMI);
LiveInterval &interval);
/// handleLiveInRegister - Create interval for a livein register.
void handleLiveInRegister(MachineBasicBlock* mbb,