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author | Andrew Trick <atrick@apple.com> | 2013-04-24 15:54:43 +0000 |
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committer | Andrew Trick <atrick@apple.com> | 2013-04-24 15:54:43 +0000 |
commit | e38afe1e335084134f7830ba6f2208e2ddde59b4 (patch) | |
tree | e50d2dd8447a5d5d900d83d7c1b0f58c5090e61d /include/llvm/CodeGen/ScheduleDAGInstrs.h | |
parent | e2326ad2c00fe3e8e21dbf312f1987ba92308733 (diff) | |
download | external_llvm-e38afe1e335084134f7830ba6f2208e2ddde59b4.zip external_llvm-e38afe1e335084134f7830ba6f2208e2ddde59b4.tar.gz external_llvm-e38afe1e335084134f7830ba6f2208e2ddde59b4.tar.bz2 |
MI Sched: eliminate local vreg copies.
For now, we just reschedule instructions that use the copied vregs and
let regalloc elliminate it. I would really like to eliminate the
copies on-the-fly during scheduling, but we need a complete
implementation of repairIntervalsInRange() first.
The general strategy is for the register coalescer to eliminate as
many global copies as possible and shrink live ranges to be
extended-basic-block local. The coalescer should not have to worry
about resolving local copies (e.g. it shouldn't attemp to reorder
instructions). The scheduler is a much better place to deal with local
interference. The coalescer side of this equation needs work.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180193 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'include/llvm/CodeGen/ScheduleDAGInstrs.h')
-rw-r--r-- | include/llvm/CodeGen/ScheduleDAGInstrs.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/llvm/CodeGen/ScheduleDAGInstrs.h b/include/llvm/CodeGen/ScheduleDAGInstrs.h index b71ece4..990cac6 100644 --- a/include/llvm/CodeGen/ScheduleDAGInstrs.h +++ b/include/llvm/CodeGen/ScheduleDAGInstrs.h @@ -150,6 +150,9 @@ namespace llvm { virtual ~ScheduleDAGInstrs() {} + /// \brief Expose LiveIntervals for use in DAG mutators and such. + LiveIntervals *getLIS() const { return LIS; } + /// \brief Get the machine model for instruction scheduling. const TargetSchedModel *getSchedModel() const { return &SchedModel; } |