Commit Graph

9 Commits

Author SHA1 Message Date
Jim Grosbach 20e3b9ac30 InstCombine: Simplify if(x!=0 && x!=-1).
When both constants are positive or both constants are negative,
InstCombine already simplifies comparisons like this, but when
it's exactly zero and -1, the operand sorting ends up reversed
and the pattern fails to match. Handle that special case.

Follow up for rdar://14689217

llvm-svn: 188512
2013-08-16 00:15:20 +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
Eli Friedman 61d7c8a065 Fix an infinite loop where a transform in InstCombiner::visitAnd claims a construct is changed when it is not. (See included testcase.)
Patch by Xiaoyi Guo.

llvm-svn: 140072
2011-09-19 21:58:15 +00:00
Anders Carlsson da80afef99 Make InstCombiner::FoldAndOfICmps create a ConstantRange that's the
intersection of the LHS and RHS ConstantRanges and return "false" when
the range is empty.

This simplifies some code and catches some extra cases.

llvm-svn: 126744
2011-03-01 15:05:01 +00:00
Benjamin Kramer 8c35fb0739 Teach InstructionSimplify to fold (A & B) & A -> A & B and (A | B) | A -> A | B.
Reassociate does this but it doesn't catch all cases (e.g. if the operands are i1).

llvm-svn: 113651
2010-09-10 22:39:55 +00:00
Chris Lattner 1d4eb8fac4 convert to filecheck.
llvm-svn: 95854
2010-02-11 06:24:37 +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
Chris Lattner c62877e9da Implement a couple of foldings for ordered and unordered comparisons,
implementing cases related to PR1738.

llvm-svn: 43289
2007-10-24 05:38:08 +00:00