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9 Commits

Author SHA1 Message Date
Evan Cheng 4c0bd9629d Teach dag combine to match halfword byteswap patterns. 
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
Evan Cheng 7552a62af5 Add an alternative rev16 pattern. We should figure out a better way to handle these complex rev patterns. rdar://9609108 
llvm-svn: 133289
 2011-06-17 20:47:21 +00:00
Evan Cheng 678b691aa3 Another revsh pattern. rdar://9609059 
llvm-svn: 133064
 2011-06-15 17:17:48 +00:00
Evan Cheng dc1d626a3d Match a few more obvious patterns to revsh. rdar://9147637. 
llvm-svn: 127913
 2011-03-18 21:52:42 +00:00
Jim Grosbach db7415075d FileCheck-ize a few tests. 
llvm-svn: 117156
 2010-10-22 21:55:03 +00:00
Dan Gohman c8054d90fb Eliminate more uses of llvm-as and llvm-dis. 
llvm-svn: 81293
 2009-09-09 00:09:15 +00:00
Tanya Lattner f697c03883 Remove llvm-upgrade. 
llvm-svn: 47238
 2008-02-17 20:02:20 +00:00
Reid Spencer b5dc70c270 For PR1319: Upgrade to use new test harness 
llvm-svn: 36076
 2007-04-15 19:11:47 +00:00
Evan Cheng a5007faaa6 ARM test cases contributed by Apple. 
llvm-svn: 33354
 2007-01-19 09:20:23 +00:00