03f3e248eb
InstCombine: fold (A >> C) == (B >> C) --> (A^B) < (1 << C) for constant Cs.
...
This is common in bitfield code.
llvm-svn: 194925
2013-11-16 16:00:48 +00:00
c1c7a1309c
Update Transforms tests to use CHECK-LABEL for easier debugging. No functionality change.
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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
d7beca87f5
Tests: rewrite 'opt ... %s' to 'opt ... < %s' so that opt does not emit a ModuleID
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This is done to avoid odd test failures, like the one fixed in r171243.
My previous regex was not good enough to find these.
llvm-svn: 171343
2013-01-01 13:57:25 +00:00
401e6093c9
Fix some CHECK lines which were ignored by accident.
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llvm-svn: 91214
2009-12-12 09:25:50 +00:00
a0e9d700dc
Generalize this optimization to work on equality comparisons between any two
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integers that are constant except for a single bit (the same n-th bit in each).
llvm-svn: 90646
2009-12-05 05:00:00 +00:00
922d4ab574
Reapply r88830 with a bugfix: this transform only applies to icmp eq/ne. This
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fixes part of PR5438.
llvm-svn: 89639
2009-11-23 03:17:33 +00:00
95148689c9
Revert r88830 and r88831 which appear to have caused a selfhost buildbot some
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grief. I suspect this patch merely exposed a bug else.
llvm-svn: 88841
2009-11-15 07:47:32 +00:00
6a6ac7e105
Correct typo.
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llvm-svn: 88831
2009-11-15 06:16:57 +00:00
e29fa4c7a1
Teach instcombine to look for booleans in wider integers when it encounters a
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zext(icmp). It may be able to optimize that away. This fixes one of the cases
in PR5438.
llvm-svn: 88830
2009-11-15 05:55:17 +00:00
Benjamin Kramer