Benjamin Kramer
39acdb0200
MemCpyOpt: When forming a memset from stores also take GEP constexprs into account.
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This is common when storing to global variables.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@163809 91177308-0d34-0410-b5e6-96231b3b80d8
2012-09-13 16:29:49 +00:00
Chad Rosier
dce42b75dc
Probably not a good idea to convert a single vector load into a memcpy. We
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don't do this now, but add a test case to prevent this from happening in the
future.
Additional test for rdar://9892684
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@145879 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-06 00:19:08 +00:00
Chad Rosier
d8bd26ee24
Make the MemCpyOptimizer a bit more aggressive. I can't think of a scenerio
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where this would be bad as the backend shouldn't have a problem inlining small
memcpys.
rdar://10510150
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@145865 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-05 22:37:00 +00:00
Chris Lattner
d318fc2ceb
revert 123144, reenabling the rest of memset formation.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123302 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-12 03:25:15 +00:00
Chris Lattner
d2e905027b
revert r123146 which disabled code that wasn't the root cause
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of the bootstrap miscompare issue.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123299 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-12 01:52:23 +00:00
Chris Lattner
a806be66c1
another (more) aggressive attempt to bring llvm-gcc-i386-linux-selfhost
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back to life.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123146 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-10 00:47:34 +00:00
Chris Lattner
d8408270f3
temporarily disable memset formation from memsets in an effort to restore buildbot stability.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123144 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-09 23:52:48 +00:00
Chris Lattner
d90a192279
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
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123089 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-08 21:19:19 +00:00
Chris Lattner
9fa11e94b5
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.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123087 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-08 21:07:56 +00:00
Chris Lattner
06511264f8
enhance memcpyopt to merge a store and a subsequent
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memset into a single larger memset.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123086 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-08 20:54:51 +00:00
Chris Lattner
355f5778aa
merge two tests and filecheckify
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123082 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-08 20:27:22 +00:00
Dan Gohman
f2f6ce65b7
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.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81537 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-11 18:01:28 +00:00
Dan Gohman
3e054fe9ef
Use opt -S instead of piping bitcode output through llvm-dis.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81257 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-08 22:34:10 +00:00
Dan Gohman
b1e1e82c54
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.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81226 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-08 16:50:01 +00:00
Owen Anderson
a8bd65835b
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.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50034 91177308-0d34-0410-b5e6-96231b3b80d8
2008-04-21 07:45:10 +00:00
Owen Anderson
a723d1e48f
Factor a bunch of functionality related to memcpy and memset transforms out of
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GVN and into its own pass.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49419 91177308-0d34-0410-b5e6-96231b3b80d8
2008-04-09 08:23:16 +00:00
