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25 Commits

Author SHA1 Message Date
Jakob Stoklund Olesen
36ac2b0ece Teach antidependency breakers to use RegisterClassInfo. 
No functional change was intended.

llvm-svn: 133202
 2011-06-16 21:56:21 +00:00
Devang Patel
6455c3f6ae Update DBG_VALUEs while breaking anti dependencies. 
llvm-svn: 132487
 2011-06-02 21:26:52 +00:00
Andrew Trick
3286438277 Fix PostRA antidependence breaker. 
Avoid using the same register for two def operands or and earlyclobber
def and use operand. This fixes PR8986 and improves on the prior fix
for rdar://problem/8959122.

llvm-svn: 125089
 2011-02-08 17:39:46 +00:00
Andrew Trick
2cdb14d30b Fix an anti-dep breaker corner case. 
<rdar://problem/8959122> illegal register operands for UMULL instruction in cfrac nightly test
I'm stil working on a unit test, but the case is:
rx = movcc rx, r3
r2 = ldr
r2, r3 = umull r2, r2

The anti-dep breaker should not convert this into an illegal instruction:
r2, r2 = umull

llvm-svn: 124932
 2011-02-05 02:58:46 +00:00
Andrew Trick
f861447393 Fixes <rdar://problem/8612856>: During postRAsched, the antidependence 
breaker needs to check all definitions of the antidepenent register to
avoid multiple defs of the same new register.

llvm-svn: 118032
 2010-11-02 18:16:45 +00:00
Bob Wilson
ac095e1026 Fix a miscompile in 186.crafty for Thumb2 that was exposed by Evan's 
scheduling change in svn 115121.  The CriticalAntiDepBreaker had bad
liveness information.  It was calculating the KillIndices for one scheduling
region in a basic block, rescheduling that region so the KillIndices were
no longer valid, and then using those wrong KillIndices to make decisions
for the next scheduling region.  I've not been able to reduce a small
testcase for this.  Radar 8502534.

llvm-svn: 115400
 2010-10-02 01:49:29 +00:00
Bob Wilson
cc4cd788ec Fix a comment typo. 
llvm-svn: 113653
 2010-09-10 22:42:21 +00:00
Jim Grosbach
8a3babf59a Anti-dependency breaking needs to be careful not to use reserved regs 
llvm-svn: 112832
 2010-09-02 17:12:55 +00:00
Dan Gohman
64157c1919 Fix a use-after-free. 
llvm-svn: 109468
 2010-07-26 23:40:24 +00:00
Bill Wendling
5803639a36 Use std::vector instead of TargetRegisterInfo::FirstVirtualRegister. This time 
make sure to allocate enough space in the std::vector.

llvm-svn: 108449
 2010-07-15 19:58:14 +00:00
Chris Lattner
44b03b850b revert bill's patches in an attempt to fix the buildbot. 
llvm-svn: 108419
 2010-07-15 06:51:46 +00:00
Bill Wendling
ffdbca76f9 Use std::vector instead of a hard-coded array. The length of that array could 
get *very* large, but we only need it to be the size of thenumber of pregs.

llvm-svn: 108411
 2010-07-15 05:56:32 +00:00
Evan Cheng
46b89e05fd Make post-ra scheduling, anti-dep breaking, and register scavenger (conservatively) aware of predicated instructions. This enables ARM to move if-conversion before post-ra scheduler. 
llvm-svn: 106091
 2010-06-16 07:35:02 +00:00
Jim Grosbach
cc4ba44538 Not all entries in the range will have an SUnit. Check for that when looking 
for debug information.

llvm-svn: 105324
 2010-06-02 15:29:36 +00:00
Jim Grosbach
7b5f627cf8 Update debug information when breaking anti-dependencies. rdar://7759363 
llvm-svn: 105300
 2010-06-01 23:48:44 +00:00
Jim Grosbach
869f73322d Remove trailing whitespace 
llvm-svn: 103807
 2010-05-14 21:20:46 +00:00
Dan Gohman
60e18d1d07 Make BreakAntiDependencies' SUnits argument const, and make the Begin 
and End arguments by-value rather than by-reference.

llvm-svn: 101830
 2010-04-19 23:11:58 +00:00
Dale Johannesen
b1fd546dd0 Fix some more places where dbg_value affected codegen. 
llvm-svn: 97765
 2010-03-05 00:02:59 +00:00
Jim Grosbach
0beaad246d Anti-dependency breaking needs to be careful regarding instructions with 
multiple register definitions.

llvm-svn: 92864
 2010-01-06 22:21:25 +00:00
Jim Grosbach
2101815d36 80 column and whitespace cleanup 
llvm-svn: 92837
 2010-01-06 16:48:02 +00:00
David Greene
c6beea09c5 Change errs() to dbgs(). 
llvm-svn: 92490
 2010-01-04 17:47:05 +00:00
David Goodwin
2bc2d833ab <rdar://problem/7453528>. Track only physical registers that are valid for the target. 
llvm-svn: 90970
 2009-12-09 17:18:22 +00:00
David Goodwin
8954ccb109 Remove some old experimental code that is no longer needed. Remove additional, speculative scheduling pass as its cost did not translate into significant performance improvement. Minor tweaks. 
llvm-svn: 89471
 2009-11-20 19:32:48 +00:00
David Goodwin
629a685f05 Do a scheduling pass ignoring anti-dependencies to identify candidate registers that should be renamed. 
llvm-svn: 85939
 2009-11-03 20:57:50 +00:00
David Goodwin
f6199e95b0 Break anti-dependence breaking out into its own class. 
llvm-svn: 85127
 2009-10-26 16:59:04 +00:00