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1410b7620a
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8141 Commits

Author SHA1 Message Date
Dan Gohman
1410b7620a Add assertion checks here to turn silent miscompiles into aborts. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85639 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-30 23:59:06 +00:00
Dan Gohman
4cddfd9b6f Don't mark registers dead here when processing nodes with MVT::Flag 
results. This works around a problem affecting targets which rely on
MVT::Flag to handle physical register defs.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85638 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-30 23:57:47 +00:00
Dan Gohman
0115e164ba Fix MachineLICM to use the correct virtual register class when 
unfolding loads for hoisting.  getOpcodeAfterMemoryUnfold returns the
opcode of the original operation without the load, not the load
itself, MachineLICM needs to know the operand index in order to get
the correct register class. Extend getOpcodeAfterMemoryUnfold to
return this information.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85622 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-30 22:18:41 +00:00
Lang Hames
788fa17af8 Stop the iterator in ValueLiveAt from potentially running off the end of the interval. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85599 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-30 18:12:09 +00:00
Dan Gohman
ab918103d2 Don't delete blocks which have their address taken. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85572 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-30 02:13:27 +00:00
Dan Gohman
dfbbf6e023 Mention if a block has its address taken in debug output. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85571 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-30 02:08:26 +00:00
Dan Gohman
6a55e62996 Add support for BlockAddress static initializers. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85562 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-30 01:45:18 +00:00
Dan Gohman
6ae5b32e48 Add a FIXME comment. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85559 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-30 01:38:20 +00:00
Dan Gohman
b1cac33856 Add some comments. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85558 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-30 01:34:35 +00:00
Dan Gohman
8c2b52552c Initial target-independent CodeGen support for BlockAddresses. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85556 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-30 01:27:03 +00:00
David Goodwin
5b3c308970 Between scheduling regions, correctly maintain anti-dep breaking state so that we don't incorrectly rename registers that span these regions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85537 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-29 23:30:59 +00:00
Dan Gohman
6c1de1830b Remove some unnecessary spaces in debug output. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85536 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-29 23:30:06 +00:00
Dan Gohman
e1f188fe27 Move some code from being emitted as boilerplate duplicated in every 
*ISelDAGToDAG.cpp to being regular code in SelectionDAGISel.cpp.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85530 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-29 22:30:23 +00:00
David Goodwin
67a8a7b3bd Fix a couple of bugs in aggressive anti-dep breaking. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85522 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-29 19:17:04 +00:00
Bob Wilson
7b888b8ad0 Refactor complicated predicate into a separate function. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85519 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-29 18:40:06 +00:00
Dan Gohman
533297b58d Rename usesCustomDAGSchedInserter to usesCustomInserter, and update a 
bunch of associated comments, because it doesn't have anything to do
with DAGs or scheduling. This is another step in decoupling MachineInstr
emitting from scheduling.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85517 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-29 18:10:34 +00:00
Dan Gohman
5c95230f25 Refactor the code for unfolding a load into a separate function. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85515 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-29 17:47:20 +00:00
Bill Wendling
a33ac6a4c1 Reapply r85338. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85514 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-29 17:39:46 +00:00
Jim Grosbach
f2ce516828 When the function is doing dynamic stack realignment, the spill slot will be 
indexed via the stack pointer, even if a frame pointer is present. Update the
heuristic to place it nearest the stack pointer in that case, rather than
nearest the frame pointer.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85474 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-29 02:33:47 +00:00
Dale Johannesen
78c5cdaf2a When there is a 2-instruction spill sequence, record 
the second (store) instruction in SpillSlotToUsesMap
consistently.  I don't think this matters functionally,
but it's cleaner and Evan wants it this way.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85463 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-29 01:15:40 +00:00
Bill Wendling
8bedf97f68 Don't put in these EH changes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85460 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-29 00:37:35 +00:00
Bill Wendling
f58898fd41 Reverting r85338 for now. It's causing a bootstrap failure on PPC darwin9. 
--- Reverse-merging r85338 into '.':
U    lib/CodeGen/SimpleRegisterCoalescing.cpp
U    lib/CodeGen/SimpleRegisterCoalescing.h



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85454 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-29 00:22:16 +00:00
Bob Wilson
2c04dae715 Reimplement BranchFolding change to avoid tail merging for a 1 instruction 
common tail, except when the OptimizeForSize function attribute is present.
Radar 7338114.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85441 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-28 22:10:20 +00:00
Dale Johannesen
e841d2f867 When we generate spill code, then decide we don't need 
to spill after all, we weren't handling 2-instruction
spill sequences correctly (PPC Altivec).  We need to
remove the store in this case.  Removing the other
instruction(s) would be goodness but is not needed for
correctness, and isn't done here.  7331562.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85437 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-28 21:56:18 +00:00
Eric Christopher
7e5d2ff20f Make sure we return the right sized type here. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85436 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-28 21:32:16 +00:00
Bob Wilson
a597103c32 Revert r85346 change to control tail merging by CodeGenOpt::Level. 
I'm going to redo this using the OptimizeForSize function attribute.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85426 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-28 20:46:46 +00:00
David Goodwin
82c7248518 Make AntiDepReg.h internal. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85412 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-28 18:29:54 +00:00
Dan Gohman
1507cd03a6 Don't call SDNode::isPredecessorOf when it isn't necessary. If the load's 
chains have no users, they can't be predecessors of the condition.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85394 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-28 15:28:02 +00:00
Dan Gohman
b8457a1a29 Simplify this code: if the unfolded load can't be hoisted, just delete 
the new instructions and leave the old one in place.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85393 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-28 15:23:36 +00:00
Dan Gohman
6688d61797 Rewrite SelectionDAG::isPredecessorOf to be iterative instead of 
recursive to avoid consuming extraordinary amounts of stack space
when processing tall graphs.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85369 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-28 03:44:30 +00:00
Dan Gohman
589f1f5a43 Teach MachineLICM to unfold loads from constant memory from 
otherwise unhoistable instructions in order to allow the loads
to be hoisted.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85364 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-28 03:21:57 +00:00
Evan Cheng
a1eaa3c52b Add a second ValueType argument to isFPImmLegal. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85361 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-28 01:43:28 +00:00
Dan Gohman
a104d1eab2 Mark dead physregdefs dead immediately. This helps MachineSink and 
MachineLICM and other things which run before LiveVariables is run.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85360 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-28 01:13:53 +00:00
Dan Gohman
83f6120c9a Allow constants of different types to share constant pool entries 
if they have compatible encodings.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85359 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-28 01:12:16 +00:00
Chris Lattner
ab21db79ef rename indbr -> indirectbr to appease the residents of #llvm. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85351 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-28 00:19:10 +00:00
Bob Wilson
cd4f04d6bc Record CodeGen optimization level in the BranchFolding pass so that we can 
use it to control tail merging when there is a tradeoff between performance
and code size.  When there is only 1 instruction in the common tail, we have
been merging.  That can be good for code size but is a definite loss for
performance.  Now we will avoid tail merging in that case when the
optimization level is "Aggressive", i.e., "-O3".  Radar 7338114.

Since the IfConversion pass invokes BranchFolding, it too needs to know
the optimization level.  Note that I removed the RegisterPass instantiation
for IfConversion because it required a default constructor.  If someone
wants to keep that for some reason, we can add a default constructor with
a hard-wired optimization level.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85346 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-27 23:49:38 +00:00
Lang Hames
1239c9656b Fixed a bug in the coalescer where intervals were occasionally merged despite a real interference. This fixes rdar://problem/7157961. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85338 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-27 23:16:58 +00:00
Dan Gohman
eef55dc3fd Update the MachineBasicBlock CFG for an indirect branch. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85325 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-27 22:10:34 +00:00
Dan Gohman
64825153a2 Add CodeGen support for indirect branches. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85323 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-27 21:56:26 +00:00
Devang Patel
bdf45cbe15 Do not held on to DenseMap slot accross map insertion. The insertion may cause the map to grow rending the slot invalid. 
Use this opportunity to use ValueMap instead of DenseMap.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85298 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-27 20:47:17 +00:00
Chris Lattner
98eef869ae don't use stdio 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85296 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-27 20:42:54 +00:00
Evan Cheng
eb2f969a4d Do away with addLegalFPImmediate. Add a target hook isFPImmLegal which returns true if the fp immediate can be natively codegened by target. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85281 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-27 19:56:55 +00:00
Chris Lattner
f9be95f867 add enough support for indirect branch for the feature test to pass 
(assembler,asmprinter, bc reader+writer) and document it.  Codegen
currently aborts on it.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85274 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-27 19:13:16 +00:00
Chris Lattner
75c478a96a pseudosourcevalue is also still using getGlobalContext(), so it isn't 
thread safe either.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85253 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-27 17:02:08 +00:00
Eric Christopher
7b5e61707a Add objectsize intrinsic and hook it up through codegen. Doesn't 
do anything than return "I don't know" at the moment.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85189 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-27 00:52:25 +00:00
Victor Hernandez
046e78ce55 Remove FreeInst. 
Remove LowerAllocations pass.
Update some more passes to treate free calls just like they were treating FreeInst.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85176 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-26 23:43:48 +00:00
David Goodwin
e10deca33e Allow the aggressive anti-dep breaker to process the same region multiple times. This is necessary because new anti-dependencies are exposed when "current" ones are broken. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85166 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-26 22:31:16 +00:00
David Goodwin
ada0ef86d9 Define virtual destructor in *.cpp file. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85146 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-26 19:41:00 +00:00
David Goodwin
348777110a Add aggressive anti-dependence breaker. Currently it is not the default for any target. Enable with -break-anti-dependencies=all. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85145 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-26 19:32:42 +00:00
Dan Gohman
91203cf87b When checking whether a def of an aliased register is dead, ask the 
machineinstr whether the aliased register is dead, rather than the original
register is dead. This allows it to get the correct answer when examining
an instruction like this:
  CALLpcrel32 <ga:foo>, %AL<imp-def>, %EAX<imp-def,dead>
where EAX is dead but a subregister of it is still live. This fixes PR5294.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85135 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-26 18:26:18 +00:00