Eli Friedman
9ed4ecaf4b
Fix an infinite loop where a transform in InstCombiner::visitAnd claims a construct is changed when it is not. (See included testcase.)
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Patch by Xiaoyi Guo.
llvm-svn: 140072
2011-09-19 21:58:15 +00:00
Anders Carlsson
1eb388e6c3
Make InstCombiner::FoldAndOfICmps create a ConstantRange that's the
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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
6110efbf8c
Teach InstructionSimplify to fold (A & B) & A -> A & B and (A | B) | A -> A | B.
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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
ef91e752a6
convert to filecheck.
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llvm-svn: 95854
2010-02-11 06:24:37 +00:00
Dan Gohman
c95df8b6d8
Use opt -S instead of piping bitcode output through llvm-dis.
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llvm-svn: 81257
2009-09-08 22:34:10 +00:00
Dan Gohman
8d84372836
Change these tests to feed the assembly files to opt directly, instead
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of using llvm-as, now that opt supports this.
llvm-svn: 81226
2009-09-08 16:50:01 +00:00
Chris Lattner
483c471daa
Implement a couple of foldings for ordered and unordered comparisons,
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implementing cases related to PR1738.
llvm-svn: 43289
2007-10-24 05:38:08 +00:00
