Sanjay Patel
1977275dcd
[InstSimplify] analyze (optionally casted) icmps to eliminate obviously false logic (PR27869)
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By moving this transform to InstSimplify from InstCombine, we sidestep the problem/question
raised by PR27869:
https://llvm.org/bugs/show_bug.cgi?id=27869
...where InstCombine turns an icmp+zext into a shift causing us to miss the fold.
Credit to David Majnemer for a draft patch of the changes to InstructionSimplify.cpp.
Differential Revision: http://reviews.llvm.org/D21512
llvm-svn: 273200
2016-06-20 20:59:59 +00:00
Sanjay Patel
c7bc4ff700
[InstCombine] update to use FileCheck with autogenerated exact checking
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llvm-svn: 273173
2016-06-20 17:56:13 +00:00
David Majnemer
969e1f9c9f
InstCombine: add more transforms
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C1-X <u C2 -> (X|(C2-1)) == C1
C1-X >u C2 -> (X|C2) == C1
X-C1 <u C2 -> (X & -C2) == C1
X-C1 >u C2 -> (X & ~C2) == C1
llvm-svn: 185909
2013-07-09 07:50:59 +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
Tanya Lattner
9aa573954c
Remove llvm-upgrade and update tests.
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llvm-svn: 48103
2008-03-09 08:16:40 +00:00
Reid Spencer
cdd728cca2
For PR1319:
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Make use of the END. facility on all files > 1K so that we aren't wasting CPU
cycles searching for RUN: lines that we'll never find.
llvm-svn: 36059
2007-04-15 07:38:21 +00:00
Reid Spencer
4572ce85b0
Regression is gone, don't try to find it on clean target.
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llvm-svn: 33296
2007-01-17 07:59:14 +00:00