55cf95c202
Change errs() to dbgs().
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llvm-svn: 92547
2010-01-05 00:03:48 +00:00
18fa5686f6
Add Loop contains utility methods for testing whether a loop
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contains another loop, or an instruction. The loop form is
substantially more efficient on large loops than the typical
code it replaces.
llvm-svn: 91654
2009-12-18 01:24:09 +00:00
73f9a9e2c8
Enable hoisting load from constant memories.
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llvm-svn: 89510
2009-11-20 23:31:34 +00:00
b39a9fd3ed
Add option -licm-const-load to hoist all loads from constant memory.
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llvm-svn: 89477
2009-11-20 19:55:37 +00:00
2bbeaa8774
Add MachineBasicBlock::getName, and use it in place of getBasicBlock()->getName.
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Fix debug code that assumes getBasicBlock never returns NULL.
llvm-svn: 89428
2009-11-20 01:17:03 +00:00
0229536301
Fix comment.
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llvm-svn: 89129
2009-11-17 19:19:01 +00:00
7ff831962a
- Add TargetInstrInfo::isIdentical(). It's similar to MachineInstr::isIdentical
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except it doesn't care if the definitions' virtual registers differ. This is
used by machine LICM and other MI passes to perform CSE.
- Teach Thumb2InstrInfo::isIdentical() to check two t2LDRpci_pic are identical.
Since pc relative constantpool entries are always different, this requires it
it check if the values can actually the same.
llvm-svn: 86328
2009-11-07 03:52:02 +00:00
921152fe9d
Code refactoring.
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llvm-svn: 86085
2009-11-05 00:51:13 +00:00
f42b5af549
Re-apply 85799. It turns out my code isn't buggy.
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llvm-svn: 85947
2009-11-03 21:40:02 +00:00
a8a58efc03
Revert 85799 for now. It might be breaking llvm-gcc driver.
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llvm-svn: 85827
2009-11-02 21:49:14 +00:00
2729543984
Initilize the machine LICM CSE map upon the first time an instruction is hoisted to
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the loop preheader. Add instructions which are already in the preheader block that
may be common expressions of those that are hoisted out. These does get a few more
instructions CSE'ed.
llvm-svn: 85799
2009-11-02 08:09:49 +00:00
49fa51d936
Fix MachineLICM to use the correct virtual register class when
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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.
llvm-svn: 85622
2009-10-30 22:18:41 +00:00
104f57cae8
Refactor the code for unfolding a load into a separate function.
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llvm-svn: 85515
2009-10-29 17:47:20 +00:00
57780dfdfc
Simplify this code: if the unfolded load can't be hoisted, just delete
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the new instructions and leave the old one in place.
llvm-svn: 85393
2009-10-28 15:23:36 +00:00
1b44f10ff4
Teach MachineLICM to unfold loads from constant memory from
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otherwise unhoistable instructions in order to allow the loads
to be hoisted.
llvm-svn: 85364
2009-10-28 03:21:57 +00:00
974e12b2d3
Remove includes of Support/Compiler.h that are no longer needed after the
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VISIBILITY_HIDDEN removal.
llvm-svn: 85043
2009-10-25 06:57:41 +00:00
02d5f77d26
Remove VISIBILITY_HIDDEN from class/struct found inside anonymous namespaces.
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Chris claims we should never have visibility_hidden inside any .cpp file but
that's still not true even after this commit.
llvm-svn: 85042
2009-10-25 06:33:48 +00:00
87b02d5bbc
Factor out LiveIntervalAnalysis' code to determine whether an instruction
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is trivially rematerializable and integrate it into
TargetInstrInfo::isTriviallyReMaterializable. This way, all places that
need to know whether an instruction is rematerializable will get the
same answer.
This enables the useful parts of the aggressive-remat option by
default -- using AliasAnalysis to determine whether a memory location
is invariant, and removes the questionable parts -- rematting operations
with virtual register inputs that may not be live everywhere.
llvm-svn: 83687
2009-10-09 23:27:56 +00:00
e19c1810d7
isTriviallyReMaterializable checks the
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TargetInstrDesc::isRematerializable flag, so it isn't necessary to do
this check in its callers.
llvm-svn: 83671
2009-10-09 21:02:10 +00:00
7ddb844a2d
Give Dan and my recent changes, machine LICM is now code size neutral.
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llvm-svn: 83624
2009-10-09 06:31:25 +00:00
ccd4545ecb
Fix a logic error that caused non-rematable loop invariants loads to be licm'ed out of loop.
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llvm-svn: 83622
2009-10-09 06:21:52 +00:00
be8137b0b4
Replace TargetInstrInfo::isInvariantLoad and its target-specific
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implementations with a new MachineInstr::isInvariantLoad, which uses
MachineMemOperands and is target-independent. This brings MachineLICM
and other functionality to targets which previously lacked an
isInvariantLoad implementation.
llvm-svn: 83475
2009-10-07 17:38:06 +00:00
2f5bdcb7c2
Don't hoist or sink instructions with physreg uses if the physreg is
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allocatable. Even if it doesn't appear to have any defs, it may latter
on after register allocation.
llvm-svn: 82834
2009-09-26 02:34:00 +00:00
e30d63f1d8
Unbreak MachineLICM for instructions that reference RIP on x86-64 too.
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llvm-svn: 82825
2009-09-25 23:58:45 +00:00
8781b35be5
Convert DOUT to DEBUG(errs()...).
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llvm-svn: 79754
2009-08-22 20:25:44 +00:00
7c50c9bd63
Tidy #includes.
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llvm-svn: 78677
2009-08-11 16:02:12 +00:00
0dd5e1ed39
More migration to raw_ostream, the water has dried up around the iostream hole.
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- Some clients which used DOUT have moved to DEBUG. We are deprecating the
"magic" DOUT behavior which avoided calling printing functions when the
statement was disabled. In addition to being unnecessary magic, it had the
downside of leaving code in -Asserts builds, and of hiding potentially
unnecessary computations.
llvm-svn: 77019
2009-07-25 00:23:56 +00:00
8d0b4d4fd6
MachineLICM CSE should match destination register classes; avoid hoisting implicit_def's.
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llvm-svn: 65592
2009-02-27 00:02:22 +00:00
9d8bfbfdef
Machine LICM increases register pressure and it almost always increase code size. For now, disable it for optimizing for size.
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llvm-svn: 63856
2009-02-05 08:51:13 +00:00
399660c384
Teach machine licm to CSE hoisted instructions.
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llvm-svn: 63854
2009-02-05 08:45:46 +00:00
4ded601445
Don't call isInvariantLoad twice.
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llvm-svn: 63729
2009-02-04 09:21:58 +00:00
1d9f7ac8cc
Don't bother hoisting out a "cheap" instruction if all of its uses are PHIs. LICM "cheap" instructions are not particularly beneficial to start with. This will just end up making the copies harder to coalesce.
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llvm-svn: 63728
2009-02-04 09:19:56 +00:00
0649abdfe2
For now, only hoist re-materilizable instructions. LICM will increase register pressure. We want to avoid spilling more instructions if it's possible.
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llvm-svn: 63725
2009-02-04 07:17:49 +00:00
79618d1de8
Simplify the MachineLICM pass by having it only traverse outer
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loops, hoisting instructions all the way out in one step rather
than hoisting them one nest level at a time. Also, make a few
other code simplifications. This speeds up MachineLICM
by several fold.
llvm-svn: 62283
2009-01-15 22:01:38 +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
072e52f170
Use isTerminator() instead of isBranch()||isReturn() in
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several places. isTerminator() returns true for a superset
of cases, and includes things like FP_REG_KILL, which are
nither return or branch but aren't safe to move/remat/etc.
llvm-svn: 61373
2008-12-23 17:28:50 +00:00
83682a9441
Give MachineLICM a name, for -time-passes etc.
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llvm-svn: 61184
2008-12-18 01:37:56 +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
a79db30d28
Tidy up several unbeseeming casts from pointer to intptr_t.
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llvm-svn: 55779
2008-09-04 17:05:41 +00:00
58bb4f1bf0
Cosmetic changes to Machine LICM. No functionality change.
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llvm-svn: 55578
2008-08-31 02:30:23 +00:00
cd01e89852
Don't hoist instructions that define a physical register.
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llvm-svn: 55074
2008-08-20 20:32:05 +00:00
cf596eb12f
Don't hoist instructions that have implicit uses or defines. Before, it was
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hoisting out some "test" and "cmp" instructions. This was obvious badness.
llvm-svn: 54908
2008-08-18 00:33:49 +00:00
ecf34435f4
Prevent option name conflict.
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llvm-svn: 53166
2008-07-07 05:42:27 +00:00
d78c400b5b
Clean up the use of static and anonymous namespaces. This turned up
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several things that were neither in an anonymous namespace nor static
but not intended to be global.
llvm-svn: 51017
2008-05-13 00:00:25 +00:00
2930845065
Revert the previous commit. Go ahead and hoist rematerializable instructions.
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llvm-svn: 50990
2008-05-12 19:47:18 +00:00
70613b84da
One real change - don't hoist something that's trivially rematerializable. It's
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possible for it to produce worse code than before.
The rest of this patch is code cleanup.
llvm-svn: 50987
2008-05-12 19:38:32 +00:00
2823eaebe8
Minor cleanup. No functionality change.
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llvm-svn: 48142
2008-03-10 08:13:01 +00:00
d7a258d325
Rename PrintableName to Name.
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llvm-svn: 47629
2008-02-26 21:47:57 +00:00
c24ea4fb41
Change "Name" to "AsmName" in the target register info. Gee, a refactoring tool
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would have been a Godsend here!
llvm-svn: 47625
2008-02-26 21:11:01 +00:00
3a4be0fdef
Rename MRegisterInfo to TargetRegisterInfo.
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llvm-svn: 46930
2008-02-10 18:45:23 +00:00
David Greene