Owen Anderson
eadd074b22
Fix an issue where GVN had the sizes of the two memcpy's reverse, resulting
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in an invalid transformation.
llvm-svn: 47639
2008-02-26 23:06:17 +00:00
Owen Anderson
6eafd532ab
Fix an issue where GVN was performing the return slot optimization when it was
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not safe. This is fixed by more aggressively checking that the return slot is
not used elsewhere in the function.
llvm-svn: 47544
2008-02-25 04:08:09 +00:00
Owen Anderson
432abc0479
Fix an issue where GVN would try to use an instruction before its definition when performing return slot optimization.
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llvm-svn: 47541
2008-02-25 00:40:41 +00:00
Chris Lattner
a6dc8aaa3f
make this just a bit more strict.
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llvm-svn: 47274
2008-02-18 17:33:10 +00:00
Owen Anderson
7b092ea631
Add support to GVN for performing sret return slot optimization. This means that, if an sret function tail calls
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another sret function, it should pass its own sret parameter to the tail callee, allowing it to fill in the correct
return value. llvm-gcc does not emit this by default. Instead, it allocates space in the caller for the sret of
the tail call and then uses memcpy to copy the result into the caller's sret parameter. This optimization detects
and optimizes that case.
llvm-svn: 47265
2008-02-18 09:24:53 +00:00
Nick Lewycky
12098ea401
Testcase for PR2032.
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llvm-svn: 47113
2008-02-14 07:15:11 +00:00
Eli Friedman
cf6273d015
Add a note pointing to PR1996.
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llvm-svn: 47055
2008-02-13 07:56:04 +00:00
Eli Friedman
75220639b6
Add test for PR1996. (This is my first time adding a test for a
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transform, so please review.)
llvm-svn: 47050
2008-02-13 06:55:57 +00:00
Owen Anderson
274aa2846e
Re-apply the patch to improve the optimizations of memcpy's, with several
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bugs fixed. This now passes PPC bootstrap.
llvm-svn: 47026
2008-02-12 21:15:18 +00:00
Bill Wendling
8a28ab4b1f
Temporarily reverting:
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http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20080128/057882.html
This is causing a miscompilation on PPC G5 and just now seeing it on iMac x86-64.
llvm-svn: 46822
2008-02-06 20:03:07 +00:00
Owen Anderson
e2150dfe24
Make this test more aggressive, to cover recent improvements.
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llvm-svn: 46695
2008-02-04 04:55:24 +00:00
Owen Anderson
aaba6f96da
Allow GVN to hack on memcpy's, making them open to further optimization.
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llvm-svn: 46693
2008-02-04 02:59:58 +00:00
Dan Gohman
794fa1f8f7
Convert tests using "| wc -l | grep ..." to use the count script.
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llvm-svn: 41097
2007-08-15 13:36:28 +00:00
Owen Anderson
9c996b3212
Fix a failure I accidentally caused in my last commit by mishandling the
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removal of redundant phis.
llvm-svn: 40650
2007-07-31 20:18:28 +00:00
Owen Anderson
d178c05c62
Fix a misoptimization in aha.
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llvm-svn: 40642
2007-07-31 17:43:14 +00:00
Owen Anderson
a8d0a6ee40
Fix a bug caused by indiscriminantly asking for the dominators of a predecessor.
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llvm-svn: 40595
2007-07-30 16:57:08 +00:00
Owen Anderson
ed3e63a203
Fix a bug introduced in my last commit.
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llvm-svn: 40542
2007-07-26 18:57:04 +00:00
Owen Anderson
f2b10d3de3
Fix a couple more bugs in the phi construction by pulling in code that does
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almost the same things from LCSSA.
llvm-svn: 40540
2007-07-26 18:26:51 +00:00
Owen Anderson
ed75133924
Fix what is _hopefully_ the last corner case for loops.
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llvm-svn: 40503
2007-07-25 23:54:42 +00:00
Owen Anderson
1e53615073
My last commit was not correct for nested loops. Fix it, and add a testcase for it.
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llvm-svn: 40498
2007-07-25 22:19:40 +00:00
Owen Anderson
ce9d73dbe7
Fix an infinite loop on 300.twolf.
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llvm-svn: 40497
2007-07-25 22:03:06 +00:00
Owen Anderson
b215074820
Fix a bug in non-local memdep that was causing an infinite loop on 175.vpr.
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llvm-svn: 40495
2007-07-25 21:26:36 +00:00
Owen Anderson
522f7a7608
Fix a bug that was causing GVN to crash on 252.eon.
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llvm-svn: 40494
2007-07-25 21:13:41 +00:00
Owen Anderson
6a1a8d05b8
Add basic support for performing whole-function RLE.
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Note: This has not yet been thoroughly tested. Use at your own risk.
llvm-svn: 40489
2007-07-25 19:57:03 +00:00
Owen Anderson
eb9f1b612c
Add a GVN pass, using the value numbering code I developed for GVNPRE and the
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load elimination code from RedundantLoadElimination.
llvm-svn: 40469
2007-07-24 17:55:58 +00:00
