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102 Commits

Author SHA1 Message Date
Owen Anderson a7aed18624 Reapply r110396, with fixes to appease the Linux buildbot gods. 
llvm-svn: 110460
 2010-08-06 18:33:48 +00:00
Owen Anderson bda59bd247 Revert r110396 to fix buildbots. 
llvm-svn: 110410
 2010-08-06 00:23:35 +00:00
Owen Anderson 755aceb5d0 Don't use PassInfo* as a type identifier for passes. Instead, use the address of the static 
ID member as the sole unique type identifier.  Clean up APIs related to this change.

llvm-svn: 110396
 2010-08-05 23:42:04 +00:00
Dale Johannesen 329d4741a5 Comment typo. 
llvm-svn: 109765
 2010-07-29 17:45:24 +00:00
Owen Anderson a57b97e7e7 Fix batch of converting RegisterPass<> to INTIALIZE_PASS(). 
llvm-svn: 109045
 2010-07-21 22:09:45 +00:00
Dale Johannesen 6e5ec6263e Fix test for switch statements and increase 
threshold a bit per experimentation.

llvm-svn: 108935
 2010-07-20 21:29:12 +00:00
Dale Johannesen 08645f1991 Don't hoist things out of a large switch inside a 
loop, for the reasons in the comments.  This is a
major win on 253.perlbmk on ARM Darwin.  I expect it
to be a good heuristic in general, but it's possible
some things will regress; I'll be watching.
7940152.

llvm-svn: 108792
 2010-07-20 00:50:13 +00:00
Evan Cheng d542414945 Teach ProcessImplicitDefs to transform more COPY instructions into IMPLICIT_DEF (and subsequently eliminate them). This allows machine LICM to hoist IMPLICIT_DEF's. PR7620. 
llvm-svn: 108304
 2010-07-14 01:22:19 +00:00
Chris Lattner 0b7ae20a35 change machinelicm to use MachineInstr::isSafeToMove. No 
intended functionality change.

The avoidance of hoistiing implicitdef seems wrong though.

llvm-svn: 108109
 2010-07-12 00:00:35 +00:00
Dan Gohman 7929c448fc Fix MachineLICM to actually visit inner loops. 
llvm-svn: 108001
 2010-07-09 18:49:45 +00:00
Dan Gohman 3570f81b1e Move PHIElimination's SplitCriticalEdge for MachineBasicBlocks out 
into a utility routine, teach it how to update MachineLoopInfo, and
make use of it in MachineLICM to split critical edges on demand.

llvm-svn: 106555
 2010-06-22 17:25:57 +00:00
Evan Cheng 032f3261a2 Doh. Machine LICM is re-initializing the CSE map over and over. Patch by Anna Zaks. rdar://8037934. 
llvm-svn: 105065
 2010-05-29 00:06:36 +00:00
Dan Gohman c90f51c00b Teach MachineLICM and MachineSink how to clear kill flags conservatively 
when they move instructions.

llvm-svn: 103737
 2010-05-13 20:34:42 +00:00
Jakob Stoklund Olesen 011207a0ae When MachineLICM is hoisting a physical register after regalloc, make sure the 
register is not killed in the loop.

This fixes 188.ammp on ARM where the post-ra scheduler would grab a register
that looked available but wasn't.

A testcase would be huge and fragile, sorry.

llvm-svn: 101930
 2010-04-20 18:45:47 +00:00
Evan Cheng 5fdb57cc10 Postra machine licm must add registers defined by loop invariants to *all* of 
the live-in sets of BBs in the loop. Otherwise later pass may end up using the
registers and override the invariant. rdar://7852937
No reasonablly sized test case possible.

llvm-svn: 101626
 2010-04-17 07:07:11 +00:00
Evan Cheng 87585d72a5 Fast path implicit_def check. 
llvm-svn: 101183
 2010-04-13 22:13:34 +00:00
Evan Cheng cce672c172 Avoid variable shadowing. 
llvm-svn: 101170
 2010-04-13 20:25:29 +00:00
Evan Cheng 89e74792b6 Expand postra machine licm's capability a little more. If an instruction's register operands are all loop invariants, then it's safe to hoist it. 
llvm-svn: 101167
 2010-04-13 20:21:05 +00:00
Evan Cheng 0a2aff2d12 Teach postra machine licm to hoist more obvious invariants, e.g. instructions with no source operands. 
llvm-svn: 101154
 2010-04-13 18:16:00 +00:00
Dan Gohman 9d2d053e11 Eliminate MachineBasicBlock::const_livein_iterator and make 
MachineBasicBlock::livein_iterator a const_iterator, because
clients shouldn't ever be using the iterator interface to
mutate the livein set.

llvm-svn: 101147
 2010-04-13 16:57:55 +00:00
Benjamin Kramer d0b5c6cbed Plug trivial leak. 
llvm-svn: 101034
 2010-04-12 11:38:35 +00:00
Dan Gohman 87f8207c97 Delete this obsolete comment. 
llvm-svn: 100858
 2010-04-09 14:12:01 +00:00
Evan Cheng 058b9f04e8 Make post regalloc machine licm functional. It now passes all of MultiSource. 
llvm-svn: 100742
 2010-04-08 01:03:47 +00:00
Evan Cheng 5ed679282b Add comments for missed opportunities. 
llvm-svn: 100610
 2010-04-07 06:00:33 +00:00
Evan Cheng fcbcc0bd51 Fix typo. 
llvm-svn: 100609
 2010-04-07 05:59:12 +00:00