1
0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-02-19 06:31:18 +00:00

9 Commits

Author SHA1 Message Date
Andrew Trick
6a7770b7ae Enable MI Sched for x86.
This changes the SelectionDAG scheduling preference to source
order. Soon, the SelectionDAG scheduler can be bypassed saving
a nice chunk of compile time.

Performance differences that result from this change are often a
consequence of register coalescing. The register coalescer is far from
perfect. Bugs can be filed for deficiencies.

On x86 SandyBridge/Haswell, the source order schedule is often
preserved, particularly for small blocks.

Register pressure is generally improved over the SD scheduler's ILP
mode. However, we are still able to handle large blocks that require
latency hiding, unlike the SD scheduler's BURR mode. MI scheduler also
attempts to discover the critical path in single-block loops and
adjust heuristics accordingly.

The MI scheduler relies on the new machine model. This is currently
unimplemented for AVX, so we may not be generating the best code yet.

Unit tests are updated so they don't depend on SD scheduling heuristics.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@192750 91177308-0d34-0410-b5e6-96231b3b80d8
2013-10-15 23:33:07 +00:00
Stephen Lin
8b2b8a1835 Mass update to CodeGen tests to use CHECK-LABEL for labels corresponding to function definitions for more informative error messages. No functionality change and all updated tests passed locally.
This update was done with the following bash script:

  find test/CodeGen -name "*.ll" | \
  while read NAME; do
    echo "$NAME"
    if ! grep -q "^; *RUN: *llc.*debug" $NAME; then
      TEMP=`mktemp -t temp`
      cp $NAME $TEMP
      sed -n "s/^define [^@]*@\([A-Za-z0-9_]*\)(.*$/\1/p" < $NAME | \
      while read FUNC; do
        sed -i '' "s/;\(.*\)\([A-Za-z0-9_-]*\):\( *\)$FUNC: *\$/;\1\2-LABEL:\3$FUNC:/g" $TEMP
      done
      sed -i '' "s/;\(.*\)-LABEL-LABEL:/;\1-LABEL:/" $TEMP
      sed -i '' "s/;\(.*\)-NEXT-LABEL:/;\1-NEXT:/" $TEMP
      sed -i '' "s/;\(.*\)-NOT-LABEL:/;\1-NOT:/" $TEMP
      sed -i '' "s/;\(.*\)-DAG-LABEL:/;\1-DAG:/" $TEMP
      mv $TEMP $NAME
    fi
  done


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186280 91177308-0d34-0410-b5e6-96231b3b80d8
2013-07-14 06:24:09 +00:00
Andrew Trick
b2b5dc642c Revert "Temporarily enable MI-Sched on X86."
This reverts commit 98a9b72e8c56dc13a2617de84503a3d78352789c.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184823 91177308-0d34-0410-b5e6-96231b3b80d8
2013-06-25 02:48:58 +00:00
Andrew Trick
98a9b72e8c Temporarily enable MI-Sched on X86.
Sorry for the unit test churn. I'll try to make the change permanently
next time.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184705 91177308-0d34-0410-b5e6-96231b3b80d8
2013-06-24 09:13:20 +00:00
Craig Topper
13897fb263 Merge AVX_SET0PSY/AVX_SET0PDY/AVX2_SET0 into a single post-RA pseudo.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@162738 91177308-0d34-0410-b5e6-96231b3b80d8
2012-08-28 07:05:28 +00:00
Chad Rosier
42726835e3 Fix a regression from r147481. This combine should only happen if there is a
single use.
rdar://11360370


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@156316 91177308-0d34-0410-b5e6-96231b3b80d8
2012-05-07 18:47:44 +00:00
Andrew Trick
2674a4acdb Reapply 155668: Fix the SD scheduler to avoid gluing the same node twice.
This time, also fix the caller of AddGlue to properly handle
incomplete chains. AddGlue had failure modes, but shamefully hid them
from its caller. It's luck ran out.

Fixes rdar://11314175: BuildSchedUnits assert.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@155749 91177308-0d34-0410-b5e6-96231b3b80d8
2012-04-28 01:03:23 +00:00
Andrew Trick
0e47cfd5b6 Temporarily revert r155668: Fix the SD scheduler to avoid gluing.
This definitely caused regression with ARM -mno-thumb.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@155743 91177308-0d34-0410-b5e6-96231b3b80d8
2012-04-27 22:55:59 +00:00
Andrew Trick
aec9240be2 Fix the SD scheduler to avoid gluing the same node twice.
DAGCombine strangeness may result in multiple loads from the same
offset. They both may try to glue themselves to another load. We could
insist that the redundant loads glue themselves to each other, but the
beter fix is to bail out from bad gluing at the time we detect it.

Fixes rdar://11314175: BuildSchedUnits assert.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@155668 91177308-0d34-0410-b5e6-96231b3b80d8
2012-04-26 21:48:25 +00:00