dd5f60b7a7
revert 123144, reenabling the rest of memset formation.
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llvm-svn: 123302
2011-01-12 03:25:15 +00:00
654098f411
revert r123146 which disabled code that wasn't the root cause
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of the bootstrap miscompare issue.
llvm-svn: 123299
2011-01-12 01:52:23 +00:00
4662bd4b13
another (more) aggressive attempt to bring llvm-gcc-i386-linux-selfhost
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back to life.
llvm-svn: 123146
2011-01-10 00:47:34 +00:00
1017fa6746
temporarily disable memset formation from memsets in an effort to restore buildbot stability.
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llvm-svn: 123144
2011-01-09 23:52:48 +00:00
9a1d63ba9f
Merge memsets followed by neighboring memsets and other stores into
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larger memsets. Among other things, this fixes rdar://8760394 and
allows us to handle "Example 2" from http://blog.regehr.org/archives/320 ,
compiling it into a single 4096-byte memset:
_mad_synth_mute: ## @mad_synth_mute
## BB#0: ## %entry
pushq %rax
movl $4096, %esi ## imm = 0x1000
callq ___bzero
popq %rax
ret
llvm-svn: 123089
2011-01-08 21:19:19 +00:00
5120ebf184
fix an issue in IsPointerOffset that prevented us from recognizing that
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P and P+1 are relative to the same base pointer.
llvm-svn: 123087
2011-01-08 21:07:56 +00:00
4dc1fd938f
enhance memcpyopt to merge a store and a subsequent
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memset into a single larger memset.
llvm-svn: 123086
2011-01-08 20:54:51 +00:00
9dbbc49f74
merge two tests and filecheckify
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llvm-svn: 123082
2011-01-08 20:27:22 +00:00
1880092722
Change tests from "opt %s" to "opt < %s" so that opt doesn't see the
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input filename so that opt doesn't print the input filename in the
output so that grep lines in the tests don't unintentionally match
strings in the input filename.
llvm-svn: 81537
2009-09-11 18:01:28 +00:00
72a13d2476
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
9737a63ed8
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
6a7355caa2
Refactor memcpyopt based on Chris' suggestions. Consolidate several functions
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and simplify code that was fallout from the separation of memcpyopt and gvn.
llvm-svn: 50034
2008-04-21 07:45:10 +00:00
ef9a6fd5c2
Factor a bunch of functionality related to memcpy and memset transforms out of
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GVN and into its own pass.
llvm-svn: 49419
2008-04-09 08:23:16 +00:00
Chris Lattner