c0812702f8
minimize tests and auto-generate checks
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llvm-svn: 276147
2016-07-20 17:58:20 +00:00
94fc18d040
InstCombine: Teach icmp merging about the equivalence of bit tests and UGE/ULT with a power of 2.
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This happens in bitfield code. While there reorganize the existing code
a bit.
llvm-svn: 201176
2014-02-11 21:09:03 +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
f9d0cc0160
InstCombine: Teach foldLogOpOfMaskedICmpsHelper that sign bit tests are bit tests.
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This subsumes several other transforms while enabling us to catch more cases.
llvm-svn: 147777
2012-01-09 17:23:27 +00:00
6609f741b9
Tweak my last commit to be less conservative about uses.
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We still save an instruction when just the "and" part is replaced.
Also change the code to match comments more closely.
llvm-svn: 147753
2012-01-08 21:12:51 +00:00
da37e15345
InstCombine: If we have a bit test and a sign test anded/ored together, merge the sign bit into the bit test.
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This is common in bit field code, e.g. checking if the first or the last bit of a bit field is set.
llvm-svn: 147749
2012-01-08 18:32:24 +00:00
272f2b0044
InstCombine: Add a few missing combines for ANDs and ORs of sign bit tests.
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On x86 we now compile "if (a < 0 && b < 0)" into
testl %edi, %esi
js IF.THEN
llvm-svn: 128496
2011-03-29 22:06:41 +00:00
Sanjay Patel