diff options
Diffstat (limited to 'lib/Target/ARM/ARMISelLowering.cpp')
| -rw-r--r-- | lib/Target/ARM/ARMISelLowering.cpp | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/lib/Target/ARM/ARMISelLowering.cpp b/lib/Target/ARM/ARMISelLowering.cpp index 943a4203c1..38a2fb9b4d 100644 --- a/lib/Target/ARM/ARMISelLowering.cpp +++ b/lib/Target/ARM/ARMISelLowering.cpp @@ -292,6 +292,21 @@ ARMTargetLowering::ARMTargetLowering(TargetMachine &TM) setIfCvtBlockSizeLimit(Subtarget->isThumb() ? 0 : 10); setIfCvtDupBlockSizeLimit(Subtarget->isThumb() ? 0 : 2); + if (!Subtarget->isThumb()) { + // Use branch latency information to determine if-conversion limits. + const TargetInstrInfo *TII = getTargetMachine().getInstrInfo(); + const InstrItineraryData &InstrItins = Subtarget->getInstrItineraryData(); + unsigned Latency = InstrItins.getLatency(TII->get(ARM::BL).getSchedClass()); + if (Latency > 1) { + setIfCvtBlockSizeLimit(Latency-1); + if (Latency > 2) + setIfCvtDupBlockSizeLimit(Latency-2); + } else { + setIfCvtBlockSizeLimit(10); + setIfCvtDupBlockSizeLimit(2); + } + } + maxStoresPerMemcpy = 1; //// temporary - rewrite interface to use type // Do not enable CodePlacementOpt for now: it currently runs after the // ARMConstantIslandPass and messes up branch relaxation and placement |