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Give the pre-alloc splitter access to the VirtRegMap. It doesn't do anything 

useful with it at the moment, but it will in the future.

llvm-svn: 67012
This commit is contained in:
Owen Anderson 2009-03-14 21:40:05 +00:00
parent 8e0f9ac051
commit 0422efc994
1 changed files with 8 additions and 0 deletions
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8
llvm/lib/CodeGen/PreAllocSplitting.cpp
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@ -15,6 +15,7 @@
//===----------------------------------------------------------------------===//
#define DEBUG_TYPE "pre-alloc-split"
#include "VirtRegMap.h"
#include "llvm/CodeGen/LiveIntervalAnalysis.h"
#include "llvm/CodeGen/LiveStackAnalysis.h"
#include "llvm/CodeGen/MachineDominators.h"
@ -57,6 +58,7 @@ namespace {
MachineRegisterInfo *MRI;
LiveIntervals *LIs;
LiveStacks *LSs;
VirtRegMap *VRM;
// Barrier - Current barrier being processed.
MachineInstr *Barrier;
@ -100,8 +102,10 @@ namespace {
AU.addPreservedID(PHIEliminationID);
AU.addRequired<MachineDominatorTree>();
AU.addRequired<MachineLoopInfo>();
AU.addRequired<VirtRegMap>();
AU.addPreserved<MachineDominatorTree>();
AU.addPreserved<MachineLoopInfo>();
AU.addPreserved<VirtRegMap>();
MachineFunctionPass::getAnalysisUsage(AU);
}
@ -917,6 +921,9 @@ void PreAllocSplitting::RenumberValno(VNInfo* VN) {
MO.setReg(NewVReg);
}
// Grow the VirtRegMap, since we've created a new vreg.
VRM->grow();
// The renumbered vreg shares a stack slot with the old register.
if (IntervalSSMap.count(CurrLI->reg))
IntervalSSMap[NewVReg] = IntervalSSMap[CurrLI->reg];
@ -1512,6 +1519,7 @@ bool PreAllocSplitting::runOnMachineFunction(MachineFunction &MF) {
MRI = &MF.getRegInfo();
LIs = &getAnalysis<LiveIntervals>();
LSs = &getAnalysis<LiveStacks>();
VRM = &getAnalysis<VirtRegMap>();
bool MadeChange = false;