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| author | Hal Finkel <hfinkel@anl.gov> | 2013-04-10 18:30:16 +0000 |
|---|---|---|
| committer | Hal Finkel <hfinkel@anl.gov> | 2013-04-10 18:30:16 +0000 |
| commit | da47e17a6f58bb4dae22d3e79c69fcb1d254ba44 (patch) | |
| tree | 09d150f503077cd8cad2d5be9753a968b985c219 /lib/Target/PowerPC/PPCInstrInfo.h | |
| parent | ba69b366929a39d393e7eed0bbf2edc31d8de599 (diff) | |
| download | llvm-da47e17a6f58bb4dae22d3e79c69fcb1d254ba44.tar.gz llvm-da47e17a6f58bb4dae22d3e79c69fcb1d254ba44.tar.bz2 llvm-da47e17a6f58bb4dae22d3e79c69fcb1d254ba44.tar.xz | |
PPC: Don't predicate a diamond with two counter decrements
I've not seen this happen in practice, and probably can't until we start
allowing decrement-counter-based conditional branches to be double predicated,
but just in case, don't allow predication of a diamond in which both sides have
ctr-defining branches. Even though the branching behavior of these can be
predicated, the counter-decrementing behavior cannot be.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179199 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/PowerPC/PPCInstrInfo.h')
| -rw-r--r-- | lib/Target/PowerPC/PPCInstrInfo.h | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/lib/Target/PowerPC/PPCInstrInfo.h b/lib/Target/PowerPC/PPCInstrInfo.h index a6ab617407..b5fcc85ce4 100644 --- a/lib/Target/PowerPC/PPCInstrInfo.h +++ b/lib/Target/PowerPC/PPCInstrInfo.h @@ -173,9 +173,7 @@ public: unsigned NumT, unsigned ExtraT, MachineBasicBlock &FMBB, unsigned NumF, unsigned ExtraF, - const BranchProbability &Probability) const { - return true; - } + const BranchProbability &Probability) const; virtual bool isProfitableToDupForIfCvt(MachineBasicBlock &MBB, unsigned NumCycles, |