diff options
| -rw-r--r-- | lib/Target/ARM/ARMISelLowering.cpp | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/Target/ARM/ARMISelLowering.cpp b/lib/Target/ARM/ARMISelLowering.cpp index 345f172..2443625 100644 --- a/lib/Target/ARM/ARMISelLowering.cpp +++ b/lib/Target/ARM/ARMISelLowering.cpp @@ -294,6 +294,10 @@ ARMTargetLowering::ARMTargetLowering(TargetMachine &TM) if (!Subtarget->isThumb()) { // Use branch latency information to determine if-conversion limits. + // FIXME: If-converter should use instruction latency of the branch being + // eliminated to compute the threshold. For ARMv6, the branch "latency" + // varies depending on whether it's dynamically or statically predicted + // and on whether the destination is in the prefetch buffer. const TargetInstrInfo *TII = getTargetMachine().getInstrInfo(); const InstrItineraryData &InstrItins = Subtarget->getInstrItineraryData(); unsigned Latency= InstrItins.getLatency(TII->get(ARM::Bcc).getSchedClass()); |