b6cf8dbb96
If killed register is defined by implicit_def, do not clear it since it's live range may overlap another def of same register.
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llvm-svn: 73255
2009-06-12 21:34:26 +00:00
51856173c8
Fix pr3954. The register scavenger asserts for inline assembly with
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register destinations that are tied to source operands. The
TargetInstrDescr::findTiedToSrcOperand method silently fails for inline
assembly. The existing MachineInstr::isRegReDefinedByTwoAddr was very
close to doing what is needed, so this revision makes a few changes to
that method and also renames it to isRegTiedToUseOperand (for consistency
with the very similar isRegTiedToDefOperand and because it handles both
two-address instructions and inline assembly with tied registers).
llvm-svn: 68714
2009-04-09 17:16:43 +00:00
906152a20f
Tidy up #includes, deleting a bunch of unnecessary #includes.
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llvm-svn: 61715
2009-01-05 17:59:02 +00:00
323dbe57a6
Silience unused warnings.
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llvm-svn: 61390
2008-12-23 21:55:04 +00:00
8c82a8a984
Initialize the ImplicitDefed member, to avoid getting stale
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data from a previous block.
llvm-svn: 61237
2008-12-19 00:46:20 +00:00
7e9daef644
Fix a typo in a comment.
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llvm-svn: 60434
2008-12-02 19:27:20 +00:00
c22215a090
- Register scavenger should use MachineRegisterInfo and internal map to find the first use of a register after a given machine instruction.
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- When scavenging a register, in addition to the spill, insert a restore before the first use.
- Abort if client is looking to scavenge a register even when a previously scavenged register is still live.
llvm-svn: 59697
2008-11-20 02:32:35 +00:00
cdbbc00a4f
Make the same change to RegScavenger::backward.
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llvm-svn: 59566
2008-11-18 23:54:01 +00:00
6cea453271
We also need to keep the operand index for two address check.
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llvm-svn: 59562
2008-11-18 22:56:19 +00:00
3095c32c89
Register scavenger should process early clobber defs first. A dead early clobber def should not interfere with a normal def which happens one slot later.
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llvm-svn: 59559
2008-11-18 22:28:38 +00:00
0d1e9a8e04
Switch the MachineOperand accessors back to the short names like
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isReg, etc., from isRegister, etc.
llvm-svn: 57006
2008-10-03 15:45:36 +00:00
c7fc432b19
Minor const-correctness fixes.
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llvm-svn: 53196
2008-07-07 20:06:06 +00:00
698348dfac
Fix some constructs that gcc-4.4 warns about.
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llvm-svn: 51591
2008-05-27 11:50:51 +00:00
2cb98eb4bb
Allow registers defined by implicit_def to be clobbered.
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llvm-svn: 49512
2008-04-10 23:47:53 +00:00
b5fdc923d3
1. IMPLICIT_DEF can *re-define* any register.
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2. Coalescer can now create an interesting situation where a register def can
reaches itself without being killed.
llvm-svn: 49246
2008-04-05 01:27:09 +00:00
d6951455e4
Something that kills a super-register also
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kills the sub-register.
llvm-svn: 48038
2008-03-07 23:45:15 +00:00
39a3221e27
Fixed a register scavenger bug. If a def is re-defining part of a super register, there must be an implicit def of the super-register on the MI.
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llvm-svn: 48024
2008-03-07 20:12:54 +00:00
55bfd8c3f7
When setting the "unused" info, take into account something like this:
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%r3<def> = OR %x3<kill>, %x3
We don't want to mark the %r3 as unused even though it's a sub-register of %x3.
llvm-svn: 48003
2008-03-06 23:22:43 +00:00
6325446666
Refactor code. Remove duplicated functions that basically do the same thing as
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findRegisterUseOperandIdx, findRegisterDefOperandIndx. Fix some naming inconsistencies.
llvm-svn: 47927
2008-03-05 00:59:57 +00:00
528083bc28
Make the register scavenger update the bookkeeping values for sub/super
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registers.
llvm-svn: 47861
2008-03-03 22:12:25 +00:00
f861fbaae8
Fix typos.
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llvm-svn: 47200
2008-02-16 01:09:25 +00:00
3a4be0fdef
Rename MRegisterInfo to TargetRegisterInfo.
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llvm-svn: 46930
2008-02-10 18:45:23 +00:00
03ad885039
rename TargetInstrDescriptor -> TargetInstrDesc.
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Make MachineInstr::getDesc return a reference instead
of a pointer, since it can never be null.
llvm-svn: 45695
2008-01-07 07:27:27 +00:00
a98c679de0
Rename MachineInstr::getInstrDescriptor -> getDesc(), which reflects
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that it is cheap and efficient to get.
Move a variety of predicates from TargetInstrInfo into
TargetInstrDescriptor, which makes it much easier to query a predicate
when you don't have TII around. Now you can use MI->getDesc()->isBranch()
instead of going through TII, and this is much more efficient anyway. Not
all of the predicates have been moved over yet.
Update old code that used MI->getInstrDescriptor()->Flags to use the
new predicates in many places.
llvm-svn: 45674
2008-01-07 01:56:04 +00:00
eee14601b1
Move some more instruction creation methods from RegisterInfo into InstrInfo.
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llvm-svn: 45484
2008-01-01 21:11:32 +00:00
f3ebc3f3d2
Remove attribution from file headers, per discussion on llvmdev.
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llvm-svn: 45418
2007-12-29 20:36:04 +00:00
bb26301864
Add a argument to storeRegToStackSlot and storeRegToAddr to specify whether
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the stored register is killed.
llvm-svn: 44600
2007-12-05 03:14:33 +00:00
9da02f5ee2
Remove isReg, isImm, and isMBB, and change all their users to use
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isRegister, isImmediate, and isMachineBasicBlock, which are equivalent,
and more popular.
llvm-svn: 41958
2007-09-14 20:33:02 +00:00
bb6ecf0067
Better assertion messages.
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llvm-svn: 37890
2007-07-05 07:05:38 +00:00
8cd28f0fb1
If call frame is not part of stack frame and no dynamic alloc, eliminateFrameIndex() must adjust SP offset with size of call frames.
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llvm-svn: 36625
2007-05-01 09:01:42 +00:00
910c80851e
Rename findRegisterUseOperand to findRegisterUseOperandIdx to avoid confusion.
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llvm-svn: 36483
2007-04-26 19:00:32 +00:00
06a7041ff9
Bad bad bug. findRegisterUseOperand() returns -1 if a use if not found.
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llvm-svn: 35618
2007-04-03 06:43:29 +00:00
fd18a0cdf4
Fix reversed logic in getRegsUsed. Rename RegStates to RegsAvailable to
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hopefully forestall similar errors.
llvm-svn: 35362
2007-03-26 22:23:54 +00:00
d05a1a2ade
maintain LiveIn when splitting blocks (register scavenging needs it)
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llvm-svn: 35226
2007-03-20 21:35:06 +00:00
24f65cc91e
Minor bug fix.
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llvm-svn: 34985
2007-03-06 21:58:15 +00:00
372c2c69f8
Register scavenger is now capable of scavenging. It spills a register whose use of furthest away to make it available.
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llvm-svn: 34964
2007-03-06 10:01:25 +00:00
155ede21e0
Mark dead def as unused.
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llvm-svn: 34844
2007-03-02 10:43:16 +00:00
27bc565497
Add a version of FindUnusedReg that restrict search to a specific set of registers.
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llvm-svn: 34784
2007-03-01 08:56:24 +00:00
428eaa0059
Interface clean up.
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llvm-svn: 34770
2007-03-01 02:19:39 +00:00
a7e4b60b85
Some more code clean up.
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llvm-svn: 34700
2007-02-27 22:58:43 +00:00
8a8dc04e7e
Oops.
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llvm-svn: 34698
2007-02-27 22:10:52 +00:00
51f54640de
RegScavenger interface change to make it more flexible.
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llvm-svn: 34690
2007-02-27 21:09:48 +00:00
ca25c0ee0d
forward() should not increment internal iterator. Its client may insert instruction between now and next forward() call.
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llvm-svn: 34649
2007-02-27 01:58:48 +00:00
fb2333a333
Add an assertion.
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llvm-svn: 34596
2007-02-25 09:47:31 +00:00
584e051c28
Mark livein registers as being in used.
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llvm-svn: 34525
2007-02-23 08:41:19 +00:00
956fdeb694
Initial check in of register scavenger. Its only current functionality is tracking live registers per MBB.
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llvm-svn: 34511
2007-02-23 01:01:19 +00:00
Evan Cheng