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authorArnaud A. de Grandmaison <arnaud.adegm@gmail.com>2013-11-11 19:56:14 +0000
committerArnaud A. de Grandmaison <arnaud.adegm@gmail.com>2013-11-11 19:56:14 +0000
commitd736763847cee94c40a7f4d106cad91445834b7c (patch)
tree38052fe71edc3b4051fe1ccb5df147d565c5de03 /include/llvm/CodeGen
parentef572e31e210a03c0669e3ed2ed7cf2d789f8599 (diff)
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CalcSpillWeights: allow overidding the spill weight normalizing function
This will enable the PBQP register allocator to provide its own normalizing function. No functionnal change. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@194417 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'include/llvm/CodeGen')
-rw-r--r--include/llvm/CodeGen/CalcSpillWeights.h15
1 files changed, 12 insertions, 3 deletions
diff --git a/include/llvm/CodeGen/CalcSpillWeights.h b/include/llvm/CodeGen/CalcSpillWeights.h
index 60be611..0d79b1d 100644
--- a/include/llvm/CodeGen/CalcSpillWeights.h
+++ b/include/llvm/CodeGen/CalcSpillWeights.h
@@ -43,16 +43,23 @@ namespace llvm {
/// \brief Calculate auxiliary information for a virtual register such as its
/// spill weight and allocation hint.
class VirtRegAuxInfo {
+ public:
+ typedef float (*NormalizingFn)(float, unsigned);
+
+ private:
MachineFunction &MF;
LiveIntervals &LIS;
const MachineLoopInfo &Loops;
const MachineBlockFrequencyInfo &MBFI;
DenseMap<unsigned, float> Hint;
+ NormalizingFn normalize;
+
public:
VirtRegAuxInfo(MachineFunction &mf, LiveIntervals &lis,
const MachineLoopInfo &loops,
- const MachineBlockFrequencyInfo &mbfi)
- : MF(mf), LIS(lis), Loops(loops), MBFI(mbfi) {}
+ const MachineBlockFrequencyInfo &mbfi,
+ NormalizingFn norm = normalizeSpillWeight)
+ : MF(mf), LIS(lis), Loops(loops), MBFI(mbfi), normalize(norm) {}
/// \brief (re)compute li's spill weight and allocation hint.
void calculateSpillWeightAndHint(LiveInterval &li);
@@ -62,7 +69,9 @@ namespace llvm {
/// live intervals.
void calculateSpillWeightsAndHints(LiveIntervals &LIS, MachineFunction &MF,
const MachineLoopInfo &MLI,
- const MachineBlockFrequencyInfo &MBFI);
+ const MachineBlockFrequencyInfo &MBFI,
+ VirtRegAuxInfo::NormalizingFn norm =
+ normalizeSpillWeight);
}
#endif // LLVM_CODEGEN_CALCSPILLWEIGHTS_H