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author | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2010-08-10 18:37:40 +0000 |
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committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2010-08-10 18:37:40 +0000 |
commit | 9db3ea46cb7bd6bdf108d314daffd0dfd50a73fe (patch) | |
tree | 25b453d1ffb5c1f030f21e5b000f4a4683d4e445 /include/llvm/CodeGen/CalcSpillWeights.h | |
parent | 4bd828f78139b9bab561102c5b9c40133ad375ca (diff) | |
download | external_llvm-9db3ea46cb7bd6bdf108d314daffd0dfd50a73fe.zip external_llvm-9db3ea46cb7bd6bdf108d314daffd0dfd50a73fe.tar.gz external_llvm-9db3ea46cb7bd6bdf108d314daffd0dfd50a73fe.tar.bz2 |
Implement register class inflation.
When splitting a live range, the new registers have fewer uses and the
permissible register class may be less constrained. Recompute the register class
constraint from the uses of new registers created for a split. This may let them
be allocated from a larger set, possibly avoiding a spill.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110703 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'include/llvm/CodeGen/CalcSpillWeights.h')
-rw-r--r-- | include/llvm/CodeGen/CalcSpillWeights.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/include/llvm/CodeGen/CalcSpillWeights.h b/include/llvm/CodeGen/CalcSpillWeights.h index a47d847..240734f 100644 --- a/include/llvm/CodeGen/CalcSpillWeights.h +++ b/include/llvm/CodeGen/CalcSpillWeights.h @@ -32,10 +32,10 @@ namespace llvm { const MachineLoopInfo &loops) : mf_(mf), lis_(lis), loops_(loops) {} - /// CalculateRegClass - recompute the register class for li from its uses. + /// CalculateRegClass - recompute the register class for reg from its uses. /// Since the register class can affect the allocation hint, this function /// should be called before CalculateWeightAndHint if both are called. - void CalculateRegClass(LiveInterval &li); + void CalculateRegClass(unsigned reg); /// CalculateWeightAndHint - (re)compute li's spill weight and allocation /// hint. |