Remove the redundant check against zero when updating ProcResourceCounters in
nextGroup(), as pointed out in https://reviews.llvm.org/D50187.
Review: Ulrich Weigand.
llvm-svn: 339139
Some instructions expand to more than one decoder group.
This has been hitherto ignored, but is handled with this patch.
Review: Ulrich Weigand
https://reviews.llvm.org/D50187
llvm-svn: 338849
Since z13, the max group size will be 2 if any μop has more than 3 register
sources.
This has been ignored sofar in the SystemZHazardRecognizer, but is now
handled by recognizing those instructions and adjusting the tracking of
decoding and the cost heuristic for grouping.
Review: Ulrich Weigand
https://reviews.llvm.org/D49847
llvm-svn: 338368
Two minor issues: The new MCD SchedWrite name does not contain "Unit" like
all the others, so a check is needed. Also, print "LSU" instead of "LS".
Review: Ulrich Weigand
llvm-svn: 337700
The DEBUG() macro is very generic so it might clash with other projects.
The renaming was done as follows:
- git grep -l 'DEBUG' | xargs sed -i 's/\bDEBUG\s\?(/LLVM_DEBUG(/g'
- git diff -U0 master | ../clang/tools/clang-format/clang-format-diff.py -i -p1 -style LLVM
- Manual change to APInt
- Manually chage DOCS as regex doesn't match it.
In the transition period the DEBUG() macro is still present and aliased
to the LLVM_DEBUG() one.
Differential Revision: https://reviews.llvm.org/D43624
llvm-svn: 332240
getCurrCycleIdx() returns the decoder cycle index which the next candidate SU
will be placed on.
This patch improves this method by passing the candidate SU to it so that if
SU will begin a new group, the index of that group is returned instead.
Review: Ulrich Weigand
llvm-svn: 326880
Handle the not-taken branch in emitInstruction() where the TakenBranch
argument is available. This is cleaner than relying on EmitInstruction().
Review: Ulrich Weigand
llvm-svn: 326879
The idea of this patch is to continue the scheduler state over an MBB boundary
in the case where the successor block has only one predecessor. This means
that the scheduler will continue in the successor block (after emitting any
branch instructions) with e.g. maintained processor resource counters.
Benchmarks have been confirmed to benefit from this.
The algorithm in MachineScheduler.cpp that extracts scheduling regions of an
MBB has been extended so that the strategy may optionally reverse the order
of processing the regions themselves. This is controlled by a new method
doMBBSchedRegionsTopDown(), which defaults to false.
Handling the top-most region of an MBB first also means that a top-down
scheduler can continue the scheduler state across any scheduling boundary
between to regions inside MBB.
Review: Ulrich Weigand, Matthias Braun, Andy Trick.
https://reviews.llvm.org/D35053
llvm-svn: 311072
Post-RA sched strategy and scheduling instruction annotations for z196, zEC12
and z13.
This scheduler optimizes decoder grouping and balances processor resources
(including side steering the FPd unit instructions).
The SystemZHazardRecognizer keeps track of the scheduling state, which can
be dumped with -debug-only=misched.
Reviers: Ulrich Weigand, Andrew Trick.
https://reviews.llvm.org/D17260
llvm-svn: 284704
Jonas Paulsson