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Recalculate the spill weight and allocation hint for virtual registers created

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during live range splitting.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110686 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen 2010-08-10 17:07:22 +00:00
parent dc0830947a
commit 08e93b14c3
3 changed files with 11 additions and 4 deletions
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4
include/llvm/CodeGen/CalcSpillWeights.h
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@ -25,11 +25,11 @@ namespace llvm {
class VirtRegAuxInfo { class VirtRegAuxInfo {
MachineFunction &mf_; MachineFunction &mf_;
LiveIntervals &lis_; LiveIntervals &lis_;
MachineLoopInfo &loops_; const MachineLoopInfo &loops_;
DenseMap<unsigned, float> hint_; DenseMap<unsigned, float> hint_;
public: public:
VirtRegAuxInfo(MachineFunction &mf, LiveIntervals &lis, VirtRegAuxInfo(MachineFunction &mf, LiveIntervals &lis,
MachineLoopInfo &loops) : const MachineLoopInfo &loops) :
mf_(mf), lis_(lis), loops_(loops) {} mf_(mf), lis_(lis), loops_(loops) {}
/// CalculateRegClass - recompute the register class for li from its uses. /// CalculateRegClass - recompute the register class for li from its uses.

9
lib/CodeGen/SplitKit.cpp
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@ -15,6 +15,7 @@
#define DEBUG_TYPE "splitter" #define DEBUG_TYPE "splitter"
#include "SplitKit.h" #include "SplitKit.h"
#include "VirtRegMap.h" #include "VirtRegMap.h"
#include "llvm/CodeGen/CalcSpillWeights.h"
#include "llvm/CodeGen/LiveIntervalAnalysis.h" #include "llvm/CodeGen/LiveIntervalAnalysis.h"
#include "llvm/CodeGen/MachineFunctionPass.h" #include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/MachineInstrBuilder.h" #include "llvm/CodeGen/MachineInstrBuilder.h"
@ -566,8 +567,12 @@ void SplitEditor::rewrite() {
intervals_.push_back(dupli_); intervals_.push_back(dupli_);
} }
// FIXME: *Calculate spill weights, allocation hints, and register classes for // Calculate spill weight and allocation hints for new intervals.
// firstInterval.. VirtRegAuxInfo vrai(vrm_.getMachineFunction(), lis_, sa_.loops_);
for (unsigned i = firstInterval, e = intervals_.size(); i != e; ++i) {
LiveInterval &li = *intervals_[i];
vrai.CalculateWeightAndHint(li);
}
} }

2
lib/CodeGen/SplitKit.h
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@ -31,11 +31,13 @@ class VNInfo;
/// SplitAnalysis - Analyze a LiveInterval, looking for live range splitting /// SplitAnalysis - Analyze a LiveInterval, looking for live range splitting
/// opportunities. /// opportunities.
class SplitAnalysis { class SplitAnalysis {
public:
const MachineFunction &mf_; const MachineFunction &mf_;
const LiveIntervals &lis_; const LiveIntervals &lis_;
const MachineLoopInfo &loops_; const MachineLoopInfo &loops_;
const TargetInstrInfo &tii_; const TargetInstrInfo &tii_;
private:
// Current live interval. // Current live interval.
const LiveInterval *curli_; const LiveInterval *curli_;