diff options
| author | Hal Finkel <hfinkel@anl.gov> | 2012-06-08 19:19:53 +0000 |
|---|---|---|
| committer | Hal Finkel <hfinkel@anl.gov> | 2012-06-08 19:19:53 +0000 |
| commit | 7255d2a8084cb6aa96ea0e5f30acfff76df04ee8 (patch) | |
| tree | 785085ec68f98e4874be4b08af4b2f8497b7ed82 /lib/Target/PowerPC/PPCInstrInfo.cpp | |
| parent | 7e5631202ab5b5f2097d234d0357bc5b3b7f5530 (diff) | |
| download | llvm-7255d2a8084cb6aa96ea0e5f30acfff76df04ee8.tar.gz llvm-7255d2a8084cb6aa96ea0e5f30acfff76df04ee8.tar.bz2 llvm-7255d2a8084cb6aa96ea0e5f30acfff76df04ee8.tar.xz | |
Enable PPC CTR loop formation by default.
Thanks to Jakob's help, this now causes no new test suite failures!
Over the entire test suite, this gives an average 1% speedup. The largest speedups are:
SingleSource/Benchmarks/Misc/pi - 108%
SingleSource/Benchmarks/CoyoteBench/lpbench - 54%
MultiSource/Benchmarks/Prolangs-C/unix-smail/unix-smail - 50%
SingleSource/Benchmarks/Shootout/ary3 - 32%
SingleSource/Benchmarks/Shootout-C++/matrix - 30%
The largest slowdowns are:
MultiSource/Benchmarks/mediabench/gsm/toast/toast - -30%
MultiSource/Benchmarks/Prolangs-C/bison/mybison - -25%
MultiSource/Benchmarks/BitBench/uuencode/uuencode - -22%
MultiSource/Applications/d/make_dparser - -14%
SingleSource/Benchmarks/Shootout-C++/ary - -13%
In light of these slowdowns, additional profiling work is obviously needed!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@158223 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/PowerPC/PPCInstrInfo.cpp')
| -rw-r--r-- | lib/Target/PowerPC/PPCInstrInfo.cpp | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/lib/Target/PowerPC/PPCInstrInfo.cpp b/lib/Target/PowerPC/PPCInstrInfo.cpp index 8b868e69ec..28b3bc1596 100644 --- a/lib/Target/PowerPC/PPCInstrInfo.cpp +++ b/lib/Target/PowerPC/PPCInstrInfo.cpp @@ -41,8 +41,8 @@ extern cl::opt<bool> DisablePPC64RS; using namespace llvm; static cl:: -opt<bool> EnableCTRLoopAnal("enable-ppc-ctrloop-analysis", cl::Hidden, - cl::desc("Enable analysis for CTR loops (experimental)")); +opt<bool> DisableCTRLoopAnal("disable-ppc-ctrloop-analysis", cl::Hidden, + cl::desc("Disable analysis for CTR loops")); PPCInstrInfo::PPCInstrInfo(PPCTargetMachine &tm) : PPCGenInstrInfo(PPC::ADJCALLSTACKDOWN, PPC::ADJCALLSTACKUP), @@ -233,7 +233,7 @@ bool PPCInstrInfo::AnalyzeBranch(MachineBasicBlock &MBB,MachineBasicBlock *&TBB, LastInst->getOpcode() == PPC::BDNZ) { if (!LastInst->getOperand(0).isMBB()) return true; - if (!EnableCTRLoopAnal) + if (DisableCTRLoopAnal) return true; TBB = LastInst->getOperand(0).getMBB(); Cond.push_back(MachineOperand::CreateImm(1)); @@ -244,7 +244,7 @@ bool PPCInstrInfo::AnalyzeBranch(MachineBasicBlock &MBB,MachineBasicBlock *&TBB, LastInst->getOpcode() == PPC::BDZ) { if (!LastInst->getOperand(0).isMBB()) return true; - if (!EnableCTRLoopAnal) + if (DisableCTRLoopAnal) return true; TBB = LastInst->getOperand(0).getMBB(); Cond.push_back(MachineOperand::CreateImm(0)); @@ -282,7 +282,7 @@ bool PPCInstrInfo::AnalyzeBranch(MachineBasicBlock &MBB,MachineBasicBlock *&TBB, if (!SecondLastInst->getOperand(0).isMBB() || !LastInst->getOperand(0).isMBB()) return true; - if (!EnableCTRLoopAnal) + if (DisableCTRLoopAnal) return true; TBB = SecondLastInst->getOperand(0).getMBB(); Cond.push_back(MachineOperand::CreateImm(1)); @@ -296,7 +296,7 @@ bool PPCInstrInfo::AnalyzeBranch(MachineBasicBlock &MBB,MachineBasicBlock *&TBB, if (!SecondLastInst->getOperand(0).isMBB() || !LastInst->getOperand(0).isMBB()) return true; - if (!EnableCTRLoopAnal) + if (DisableCTRLoopAnal) return true; TBB = SecondLastInst->getOperand(0).getMBB(); Cond.push_back(MachineOperand::CreateImm(0)); |