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author | Lang Hames <lhames@gmail.com> | 2009-11-19 04:15:33 +0000 |
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committer | Lang Hames <lhames@gmail.com> | 2009-11-19 04:15:33 +0000 |
commit | 835ca07991c1b8ec47240b15417e1b2732480094 (patch) | |
tree | 798d9727b01e463498f682b5987b1aee13f3fea9 /lib/CodeGen/Spiller.cpp | |
parent | 2b5e6b1c9c9c3c3f0d07098020f9eb4527515374 (diff) | |
download | llvm-835ca07991c1b8ec47240b15417e1b2732480094.tar.gz llvm-835ca07991c1b8ec47240b15417e1b2732480094.tar.bz2 llvm-835ca07991c1b8ec47240b15417e1b2732480094.tar.xz |
Added a new Spiller implementation which wraps LiveIntervals::addIntervalsForSpills.
All spiller calls in RegAllocLinearScan now go through the new Spiller interface.
The "-new-spill-framework" command line option has been removed. To use the trivial in-place spiller you should now pass "-spiller=trivial -rewriter=trivial".
(Note the trivial spiller/rewriter are only meant to serve as examples of the new in-place modification work. Enabling them will yield terrible, though hopefully functional, code).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89311 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/Spiller.cpp')
-rw-r--r-- | lib/CodeGen/Spiller.cpp | 51 |
1 files changed, 46 insertions, 5 deletions
diff --git a/lib/CodeGen/Spiller.cpp b/lib/CodeGen/Spiller.cpp index e0445f4d07..20c4a28b1f 100644 --- a/lib/CodeGen/Spiller.cpp +++ b/lib/CodeGen/Spiller.cpp @@ -18,11 +18,25 @@ #include "llvm/CodeGen/MachineRegisterInfo.h" #include "llvm/Target/TargetMachine.h" #include "llvm/Target/TargetInstrInfo.h" +#include "llvm/Support/CommandLine.h" #include "llvm/Support/Debug.h" #include "llvm/Support/raw_ostream.h" using namespace llvm; +namespace { + enum SpillerName { trivial, standard }; +} + +static cl::opt<SpillerName> +spillerOpt("spiller", + cl::desc("Spiller to use: (default: standard)"), + cl::Prefix, + cl::values(clEnumVal(trivial, "trivial spiller"), + clEnumVal(standard, "default spiller"), + clEnumValEnd), + cl::init(standard)); + Spiller::~Spiller() {} namespace { @@ -156,18 +170,45 @@ class TrivialSpiller : public SpillerBase { public: TrivialSpiller(MachineFunction *mf, LiveIntervals *lis, LiveStacks *ls, - VirtRegMap *vrm) : - SpillerBase(mf, lis, ls, vrm) {} + VirtRegMap *vrm) + : SpillerBase(mf, lis, ls, vrm) {} - std::vector<LiveInterval*> spill(LiveInterval *li) { + std::vector<LiveInterval*> spill(LiveInterval *li, + SmallVectorImpl<LiveInterval*> &spillIs) { + // Ignore spillIs - we don't use it. return trivialSpillEverywhere(li); } }; +/// Falls back on LiveIntervals::addIntervalsForSpills. +class StandardSpiller : public Spiller { +private: + LiveIntervals *lis; + const MachineLoopInfo *loopInfo; + VirtRegMap *vrm; +public: + StandardSpiller(MachineFunction *mf, LiveIntervals *lis, LiveStacks *ls, + const MachineLoopInfo *loopInfo, VirtRegMap *vrm) + : lis(lis), loopInfo(loopInfo), vrm(vrm) {} + + /// Falls back on LiveIntervals::addIntervalsForSpills. + std::vector<LiveInterval*> spill(LiveInterval *li, + SmallVectorImpl<LiveInterval*> &spillIs) { + return lis->addIntervalsForSpills(*li, spillIs, loopInfo, *vrm); + } + +}; + } llvm::Spiller* llvm::createSpiller(MachineFunction *mf, LiveIntervals *lis, - LiveStacks *ls, VirtRegMap *vrm) { - return new TrivialSpiller(mf, lis, ls, vrm); + LiveStacks *ls, + const MachineLoopInfo *loopInfo, + VirtRegMap *vrm) { + switch (spillerOpt) { + case trivial: return new TrivialSpiller(mf, lis, ls, vrm); break; + case standard: return new StandardSpiller(mf, lis, ls, loopInfo, vrm); break; + default: llvm_unreachable("Unreachable!"); break; + } } |