f258a15bdf
Canonicalize (srl (bswap x), 16) to (rotr (bswap x), 16) if the high 16 bits
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of x are zero. This optimizes rev + lsr 16 to rev16.
rdar://10750814
llvm-svn: 151230
2012-02-23 02:58:19 +00:00
4c0bd9629d
Teach dag combine to match halfword byteswap patterns.
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1. (((x) & 0xFF00) >> 8) | (((x) & 0x00FF) << 8)
=> (bswap x) >> 16
2. ((x&0xff)<<8)|((x&0xff00)>>8)|((x&0xff000000)>>8)|((x&0x00ff0000)<<8))
=> (rotl (bswap x) 16)
This allows us to eliminate most of the def : Pat patterns for ARM rev16
revsh instructions. It catches many more cases for ARM and x86.
rdar://9609108
llvm-svn: 133503
2011-06-21 06:01:08 +00:00
7552a62af5
Add an alternative rev16 pattern. We should figure out a better way to handle these complex rev patterns. rdar://9609108
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llvm-svn: 133289
2011-06-17 20:47:21 +00:00
678b691aa3
Another revsh pattern. rdar://9609059
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llvm-svn: 133064
2011-06-15 17:17:48 +00:00
dc1d626a3d
Match a few more obvious patterns to revsh. rdar://9147637.
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llvm-svn: 127913
2011-03-18 21:52:42 +00:00
db7415075d
FileCheck-ize a few tests.
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llvm-svn: 117156
2010-10-22 21:55:03 +00:00
c8054d90fb
Eliminate more uses of llvm-as and llvm-dis.
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llvm-svn: 81293
2009-09-09 00:09:15 +00:00
f697c03883
Remove llvm-upgrade.
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llvm-svn: 47238
2008-02-17 20:02:20 +00:00
b5dc70c270
For PR1319: Upgrade to use new test harness
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llvm-svn: 36076
2007-04-15 19:11:47 +00:00
a5007faaa6
ARM test cases contributed by Apple.
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llvm-svn: 33354
2007-01-19 09:20:23 +00:00
Evan Cheng