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8 Commits

Author SHA1 Message Date
Tim Shen aec68b263d [InstCombine] Simplify and correct folding fcmps with the same children 
Summary: Take advantage of FCmpInst::Predicate's bit pattern and handle (fcmp *, x, y) | (fcmp *, x, y) and (fcmp *, x, y) & (fcmp *, x, y) more consistently. Also fold more FCmpInst::FCMP_FALSE and FCmpInst::FCMP_TRUE to constants.

Currently InstCombine wrongly folds (fcmp ogt, x, y) | (fcmp ord, x, y) to (fcmp ogt, x, y); this patch also fixes that.

Reviewers: spatel

Subscribers: llvm-commits, iteratee, echristo

Differential Revision: http://reviews.llvm.org/D21775

llvm-svn: 274156
 2016-06-29 20:10:17 +00:00
Tim Shen 4561e784f4 [InstCombine] Add full tests for FoldAndOfFCmps and FoldOrOfFCmps 
Summary: This adds tests for covering all cases that FoldAndOfFCmps and FoldOrOfFCmps handle.

Reviewers: spatel

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D21844

llvm-svn: 274144
 2016-06-29 17:55:11 +00:00
Sanjay Patel 3a0f2606ec minimize regression tests and update checks 
llvm-svn: 274047
 2016-06-28 18:40:08 +00:00
Stephen Lin c1c7a1309c Update Transforms tests to use CHECK-LABEL for easier debugging. No functionality change. 
This update was done with the following bash script:

  find test/Transforms -name "*.ll" | \
  while read NAME; do
    echo "$NAME"
    if ! grep -q "^; *RUN: *llc" $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
      mv $TEMP $NAME
    fi
  done

llvm-svn: 186268
 2013-07-14 01:42:54 +00:00
Owen Anderson a834200dbe Just because we have determined that an (fcmp | fcmp) is true for A < B, 
A == B, and A > B, does not mean we can fold it to true.  We still need to
check for A ? B (A unordered B).

llvm-svn: 123993
 2011-01-21 19:39:42 +00:00
Dan Gohman 72a13d2476 Use opt -S instead of piping bitcode output through llvm-dis. 
llvm-svn: 81257
 2009-09-08 22:34:10 +00:00
Dan Gohman 9737a63ed8 Change these tests to feed the assembly files to opt directly, instead 
of using llvm-as, now that opt supports this.

llvm-svn: 81226
 2009-09-08 16:50:01 +00:00
Evan Cheng d885f6e139 Combine (fcmp cc0 x, y) | (fcmp cc1 x, y) into a single fcmp when possible. 
llvm-svn: 57515
 2008-10-14 18:44:08 +00:00