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523 Commits

Author SHA1 Message Date
Owen Anderson 40dca46ddb Fix an issue where GVN would try to use an instruction before its definition when performing return slot optimization. 
llvm-svn: 47541
 2008-02-25 00:40:41 +00:00
Chris Lattner 23fe6630e3 make this just a bit more strict. 
llvm-svn: 47274
 2008-02-18 17:33:10 +00:00
Owen Anderson 3549553262 Add support to GVN for performing sret return slot optimization. This means that, if an sret function tail calls 
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 9592bb0390 Testcase for PR2032. 
llvm-svn: 47113
 2008-02-14 07:15:11 +00:00
Eli Friedman 460648abde Add a note pointing to PR1996. 
llvm-svn: 47055
 2008-02-13 07:56:04 +00:00
Eli Friedman 03ec63f29d Add test for PR1996. (This is my first time adding a test for a 
transform, so please review.)

llvm-svn: 47050
 2008-02-13 06:55:57 +00:00
Owen Anderson 00dba4f734 Re-apply the patch to improve the optimizations of memcpy's, with several 
bugs fixed.  This now passes PPC bootstrap.

llvm-svn: 47026
 2008-02-12 21:15:18 +00:00
Bill Wendling c676a0329c Temporarily reverting: 
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 1a78ae76e4 Make this test more aggressive, to cover recent improvements. 
llvm-svn: 46695
 2008-02-04 04:55:24 +00:00
Owen Anderson c4a7c41869 Allow GVN to hack on memcpy's, making them open to further optimization. 
llvm-svn: 46693
 2008-02-04 02:59:58 +00:00
Dan Gohman f9dd170e36 Convert tests using "| wc -l | grep ..." to use the count script. 
llvm-svn: 41097
 2007-08-15 13:36:28 +00:00
Owen Anderson 2464f4f048 Fix a failure I accidentally caused in my last commit by mishandling the 
removal of redundant phis.

llvm-svn: 40650
 2007-07-31 20:18:28 +00:00
Owen Anderson d58fa6b09f Fix a misoptimization in aha. 
llvm-svn: 40642
 2007-07-31 17:43:14 +00:00
Owen Anderson d66e285b2e Fix a bug caused by indiscriminantly asking for the dominators of a predecessor. 
llvm-svn: 40595
 2007-07-30 16:57:08 +00:00
Owen Anderson 0f692f27a3 Fix a bug introduced in my last commit. 
llvm-svn: 40542
 2007-07-26 18:57:04 +00:00
Owen Anderson dbf23ccaa0 Fix a couple more bugs in the phi construction by pulling in code that does 
almost the same things from LCSSA.

llvm-svn: 40540
 2007-07-26 18:26:51 +00:00
Owen Anderson 3b8cc30a61 Fix what is _hopefully_ the last corner case for loops. 
llvm-svn: 40503
 2007-07-25 23:54:42 +00:00
Owen Anderson 8707412593 My last commit was not correct for nested loops. Fix it, and add a testcase for it. 
llvm-svn: 40498
 2007-07-25 22:19:40 +00:00
Owen Anderson 3c67004d47 Fix an infinite loop on 300.twolf. 
llvm-svn: 40497
 2007-07-25 22:03:06 +00:00
Owen Anderson 9b796348bd Fix a bug in non-local memdep that was causing an infinite loop on 175.vpr. 
llvm-svn: 40495
 2007-07-25 21:26:36 +00:00
Owen Anderson 7bf26ee444 Fix a bug that was causing GVN to crash on 252.eon. 
llvm-svn: 40494
 2007-07-25 21:13:41 +00:00
Owen Anderson 5e5599b7ce Add basic support for performing whole-function RLE. 
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 ab6ec2eac2 Add a GVN pass, using the value numbering code I developed for GVNPRE and the 
load elimination code from RedundantLoadElimination.

llvm-svn: 40469
 2007-07-24 17:55:58 +00:00