9d0c3d21c8
Remove unneeded check (with the recent change in live variables a use
...
of a physical register is always dominated by a def).
llvm-svn: 10821
2004-01-13 21:16:25 +00:00
65bc990bda
Indentation and whitespace cleanups.
...
llvm-svn: 10820
2004-01-13 20:42:08 +00:00
6b1ec75da9
Fix bug introduced by previous commit: check if fixed intervals
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overlap before adding their spill weight.
llvm-svn: 10819
2004-01-13 20:37:01 +00:00
ebbd66c042
Correctly compute live variable information for physical registers
...
when an implicitely defined register is later used by an alias. For example:
call foo
%reg1024 = mov %AL
The call implicitely defines EAX but only AL is used. Before this fix
no information was available on AL. Now EAX and all its aliases except
AL get defined and die at the call instruction whereas AL lives to be
killed by the assignment.
llvm-svn: 10813
2004-01-13 06:24:30 +00:00
52a714b45b
Make LiveVariables::HandlePhysRegUse and
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LiveVariables::HandlePhysRegDef private they use information that is
not in memory when LiveVariables finishes the analysis.
Also update the TwoAddressInstructionPass to not use this interface.
llvm-svn: 10755
2004-01-11 09:18:45 +00:00
8043f8c294
Remove use of llvm/CodeGen/InstrSelection.h
...
llvm-svn: 10749
2004-01-10 19:16:26 +00:00
a4ee66f3ea
Finegrainify namespacification.
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This should get hunked over to the Sparc backend, along with
MachineCodeForInstruction and a bunch of files in include/llvm/Codegen,
but those battles will have to wait for a later time.
llvm-svn: 10731
2004-01-09 06:30:18 +00:00
83e84166a3
Move InstrSelection into lib/Target/Sparc, as it's sparc specific
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llvm-svn: 10730
2004-01-09 06:24:06 +00:00
b9c7999881
Move lib/Codegen/RegAlloc into lib/Target/Sparc, as it is sparc specific
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llvm-svn: 10728
2004-01-09 06:17:12 +00:00
ae5b3d4f74
Add a separate list of fixed intervals. This improves the running time
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of the register allocator as follows:
before after
mesa 2.3790 1.5994
vpr 2.6008 1.2078
gcc 1.9840 0.5273
mcf 0.2569 0.0470
eon 1.8468 1.4359
twolf 0.9475 0.2004
burg 1.6807 1.3300
lambda 1.2191 0.3764
Speedups range anyware from 30% to over 400% :-)
llvm-svn: 10712
2004-01-07 09:20:58 +00:00
a64d71203e
Minor cleanups.
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llvm-svn: 10711
2004-01-07 05:31:12 +00:00
9f62b96206
Remove declared but undefined method.
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llvm-svn: 10710
2004-01-07 02:29:33 +00:00
1e01557c4e
Change implementation of LiveIntervals::overlap(). This results in a
...
30-50% decrease in running time of the linear scan register allocator.
llvm-svn: 10707
2004-01-07 01:45:58 +00:00
2fa1aef707
Remove simple coalescing.
...
llvm-svn: 10695
2004-01-05 08:24:57 +00:00
fc3d0598df
fix warning
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llvm-svn: 10692
2004-01-05 05:42:17 +00:00
08c5311729
Currently we cannot handle two-address instructions of the form:
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A = B op C where A == C, but this cannot really occur in practice
because of SSA form. Add an assert to check that just to be safe.
llvm-svn: 10682
2004-01-05 02:25:45 +00:00
5e0e67173d
Update description.
...
llvm-svn: 10681
2004-01-04 23:09:24 +00:00
5d236005b0
Clean up a lot of the code I added yesterday by exposing the IntrinsicLowering
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implementation from the TargetMachine directly.
llvm-svn: 10636
2003-12-28 21:23:38 +00:00
a158dc8104
Reserve ECX and EDI instead of EBX and EDI. Since EBX is a callee
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saved register it has a longer free range than ECX (which is defined
every time there is a fnuction call) which makes ECX a better register
to reserve.
llvm-svn: 10635
2003-12-28 18:03:52 +00:00
43b587d94d
Add coalescing to register allocator. A hint is added to each interval
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which denotes the register we would like to be assigned to (virtual or
physical). In register allocation, if this hint exists and we can map
it to a physical register (it is either a physical register or it is a
virtual register that already got assigned to a physical one) we use
that register if it is available instead of a random one in the free
pool.
llvm-svn: 10634
2003-12-28 17:58:18 +00:00
10cac58d23
Whoops, don't try to lower non intrinsic calls
...
llvm-svn: 10632
2003-12-28 09:53:23 +00:00
4b75e04a60
Use the intrinsic lowering functionality
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llvm-svn: 10626
2003-12-28 09:43:35 +00:00
24650d2b5e
Move into the VMCore library
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llvm-svn: 10623
2003-12-28 08:30:20 +00:00
08c196dd4b
Implement the default implementation of the intrinsic lowering class
...
llvm-svn: 10621
2003-12-28 08:19:41 +00:00
27dd64242b
finegrainify namespacification
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minor cleanups
llvm-svn: 10619
2003-12-28 07:59:53 +00:00
2e8c984c58
Improve debugging output when choosing a register to spill.
...
llvm-svn: 10604
2003-12-24 18:53:31 +00:00
eeea81483f
Do a separate pass to compute spill weights because doing it inline
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with live intervals was missing registers that were used before they
were defined (in the arbitrary order live intervals numbers
instructions).
llvm-svn: 10603
2003-12-24 15:44:53 +00:00
7d7d7e89d4
Change the way free regusters are computed and perform better
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allocation in the presence of preallocated intervals.
llvm-svn: 10595
2003-12-23 18:00:33 +00:00
3ec903474f
Fix crash when compiling twolf.
...
llvm-svn: 10584
2003-12-22 13:54:29 +00:00
690e1b8de2
Remove verifyIntervals() since it doesn't actually work right now.
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llvm-svn: 10570
2003-12-21 20:41:26 +00:00
2665d9c6f9
Change weight into a float so that we can take into account the
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nesting level when computing it. Right now the allocator uses:
w = sum_over_defs_uses( 10 ^ nesting level );
llvm-svn: 10569
2003-12-21 20:19:10 +00:00
c09b77ea35
Add support for inactive intervals. This effectively reuses registers
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for live ranges that fall into assigned registers' holes.
llvm-svn: 10566
2003-12-21 05:43:40 +00:00
4cbb97bfdd
Add a new target-independent machine code freeing pass
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llvm-svn: 10560
2003-12-20 10:20:58 +00:00
9a3478e022
* Finegrainify namespacification
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* Move sparc specific code out of generic code
* Eliminate the getOffset() method which made INVALID_FRAME_OFFSET
necessary, which made pulling in MAX_INT as a sentinal necessary.
llvm-svn: 10553
2003-12-20 09:17:07 +00:00
7139090fd2
Remove TwoAddressInstruction from the public headers and add an ID
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instead, since this pass doesn't expose any state to its users.
llvm-svn: 10520
2003-12-18 22:40:24 +00:00
8f88cdfa22
Prune some #includes
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Add a statistic for # reloads
llvm-svn: 10518
2003-12-18 20:25:31 +00:00
e5e2bd6777
Modify linear scan register allocator to use the two-address
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instruction pass. This also fixes all remaining bugs for this new
allocator to pass all tests under test/Programs.
llvm-svn: 10515
2003-12-18 13:15:02 +00:00
3bd69eaac5
Fix bug in reserved registers. DH actually aliases DX and EDX which
...
are not reserved registers.
llvm-svn: 10514
2003-12-18 13:12:18 +00:00
c17d57bd82
Modify local register allocator to use the two-address instruction pass.
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llvm-svn: 10513
2003-12-18 13:08:52 +00:00
725021cb6c
Add TwoAddressInstructionPass to handle instructions that have two or
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more operands and the two first operands are constrained to be the
same. The pass takes an instruction of the form:
a = b op c
and transforms it into:
a = b
a = a op c
and also preserves live variables.
llvm-svn: 10512
2003-12-18 13:06:04 +00:00
4d87219486
Rename LiveIntervals::expired() to LiveIntervals::expiredAt().
...
llvm-svn: 10511
2003-12-18 08:56:11 +00:00
15b8036b29
When a variable is killed and redifined in a basic block only one
...
killing instruction is tracked. This causes the LiveIntervals to
create bogus intervals. The workaound is to add a range to the
interval from the redefinition to the end of the basic block.
llvm-svn: 10510
2003-12-18 08:53:43 +00:00
40874c708f
Handle multiple virtual register definitions gracefully.
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Move some of the longer LiveIntervals::Interval method out of the
header and add debug information to them. Fix bug and simplify range
merging code.
llvm-svn: 10509
2003-12-18 08:48:48 +00:00
8870674da7
Change preserve all claim to just preserve live variables and phielimination.
...
llvm-svn: 10469
2003-12-15 04:55:38 +00:00
aaba4639f8
Change interface of MachineOperand as follows:
...
a) remove opIsUse(), opIsDefOnly(), opIsDefAndUse()
b) add isUse(), isDef()
c) rename opHiBits32() to isHiBits32(),
opLoBits32() to isLoBits32(),
opHiBits64() to isHiBits64(),
opLoBits64() to isLoBits64().
This results to much more readable code, for example compare
"op.opIsDef() || op.opIsDefAndUse()" to "op.isDef()" a pattern used
very often in the code.
llvm-svn: 10461
2003-12-14 13:24:17 +00:00
4f7f017ab5
When reserving a preallocated register spill the aliases of this
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register too.
llvm-svn: 10450
2003-12-13 11:58:10 +00:00
7dbdf3839c
Ignore non-allocatable physical registers in live interval analysis.
...
llvm-svn: 10449
2003-12-13 11:11:02 +00:00
ed53b35076
Expire any active intervals left when register allocation is done.
...
llvm-svn: 10448
2003-12-13 05:50:19 +00:00
e6dc614c3c
Add instruction numbers to debugging output.
...
llvm-svn: 10447
2003-12-13 05:48:57 +00:00
06f379a278
Handle explicit physical register defs.
...
llvm-svn: 10445
2003-12-13 05:26:39 +00:00
9bced9455a
Remove unecessary if statements when looping on ImplicitDefs.
...
llvm-svn: 10444
2003-12-13 01:20:58 +00:00
fb55ac24ec
This appears to fix Bug 172 and does not break any other feature tests or
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regression tests.
llvm-svn: 10388
2003-12-10 22:51:41 +00:00
e59ad4b441
Make assertion stricter. Since the source operands are allocated at
...
this point, the second operand must be a physical register (it cannot
be a virtual one).
llvm-svn: 10292
2003-12-05 11:31:39 +00:00
f8fe176204
Fix bug in register spilling when a preallocated live range overlaps a
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potential register assignment.
llvm-svn: 10291
2003-12-05 11:17:55 +00:00
2de099e54f
Move operator<<(std::ostream&, const LiveInterval&) out of the header file.
...
llvm-svn: 10290
2003-12-05 10:38:28 +00:00
ed28ca93ef
Sort live intervals by increasing start point.
...
llvm-svn: 10289
2003-12-05 10:32:01 +00:00
5fe0031c68
Improve debugging output and clean up some code.
...
llvm-svn: 10288
2003-12-04 03:57:28 +00:00
26f17e73eb
Print instructions before register allocation is performed. Also fix
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bug where spill instructions were added to the next basic block
instead of the end of the current one if the instruction that required
the spill was the last in the block.
llvm-svn: 10272
2003-11-30 23:40:39 +00:00
0aa40f8db0
Remove "numReloaded" statistic.
...
llvm-svn: 10268
2003-11-30 05:15:36 +00:00
0e9ded74c0
Merging the linear scan register allocator in trunk. It currently passes most tests under test/Programs/SingleSource/Benchmarks/Shootout so development will continue on trunk. The allocator is not enabled by default. You will need to pass -regallo=linearscan to lli or llc to use it.
...
llvm-svn: 10103
2003-11-20 03:32:25 +00:00
960707c335
Put all LLVM code into the llvm namespace, as per bug 109.
...
llvm-svn: 9903
2003-11-11 22:41:34 +00:00
8f53a89edf
Fix problems linking against the reoptimizer; _llvm_regAllocState must have
...
externally-visible linkage, and SaveStateToModule must default to true for llc.
I don't remember why I made it const; perhaps it should be deconstified.
llvm-svn: 9858
2003-11-10 07:12:01 +00:00
c0c23c29aa
Operand numbers are now ints. Save the register allocation of the value
...
each instruction produces as "operand" -1, and the other operands as 0
.. n, as before. PhyRegAlloc::saveState() is refactored into
PhyRegAlloc::saveStateForValue().
llvm-svn: 9842
2003-11-10 00:05:26 +00:00
2b8724acc6
Let's not forget about our friends -- Constant Pool indices.
...
llvm-svn: 9750
2003-11-06 00:04:11 +00:00
a9e7fe9ea2
Do not use a class before it is defined.
...
Be gcc 3.4 clean
llvm-svn: 9727
2003-11-05 06:25:06 +00:00
69c2841b2a
Update verifySavedState()'s comment, so that it reflects its current
...
status. In doFinalization(), skip over external functions, just like
Anand's mapping info does.
llvm-svn: 9703
2003-11-04 22:42:41 +00:00
2a262ef095
Add comments.
...
llvm-svn: 9697
2003-11-04 18:25:56 +00:00
8541bd9db9
Include llvm/CodeGen/MachineCodeForInstruction.h. Use it to start
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implementing verifySavedState().
In saveState(), use the new AllocInfo::AllocStateTy enum, and increment
Insn each time through the loop.
llvm-svn: 9617
2003-10-30 21:21:33 +00:00
727ec9bec5
Make AllocState an enum.
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Move the stringifying method for that enum into class AllocInfo.
llvm-svn: 9616
2003-10-30 21:21:22 +00:00
eca381c7e8
Publicize the type of FnAllocState.
...
Prototype option to save state in a global instead of as a Constant in
the Module. (Turned off, for now, with the on/off switch welded in the off
position. You get the idea.)
llvm-svn: 9500
2003-10-24 21:21:58 +00:00
9ab7fbef60
standardize command line option names
...
llvm-svn: 9496
2003-10-24 20:05:58 +00:00
24fb8f07f3
Move the implementations of ==, != on AllocInfos here, from UnpackTraceFunction.
...
llvm-svn: 9452
2003-10-23 20:39:18 +00:00
390d31cde4
Move AllocInfo structure to a private AllocInfo.h header file.
...
Make FnAllocState contain vectors of AllocInfo, instead of LLVM Constants.
Give doFinalization a method comment, and let it do the work of converting
AllocInfos to LLVM Constants.
llvm-svn: 9451
2003-10-23 20:32:55 +00:00
a6bfe8eb9e
Make FnAllocState contain vectors of AllocInfo, instead of LLVM Constants.
...
llvm-svn: 9450
2003-10-23 20:32:02 +00:00
8e766c7ab3
New file, containing AllocInfo structure.
...
llvm-svn: 9449
2003-10-23 20:31:51 +00:00
88df876012
* Eliminate `using' directive
...
* Fix order of #includes
* Make code layout more consistent
* Eliminate extraneous whitespace and comment-lines
llvm-svn: 9433
2003-10-23 18:10:02 +00:00
dc07775d58
* Fix order of #include files
...
* Doxygen-ify method comments
llvm-svn: 9432
2003-10-23 18:06:27 +00:00
0b624fefb7
* Order #includes as per style guide
...
* Doxygen-ify comments
* Make code layout more consistent
llvm-svn: 9431
2003-10-23 18:03:50 +00:00
28ba80e648
* Use C++ style comments instead of C-style
...
* Make file description more readable
* Make code layout more consistent, include comment in assert so it's visible
during execution if it hits
llvm-svn: 9430
2003-10-23 18:02:47 +00:00
7d56d2c6fb
* Eliminate `using' directive
...
* Make code layout more consistent
llvm-svn: 9427
2003-10-23 17:43:17 +00:00
c7b1bce283
Make code layout more consistent.
...
llvm-svn: 9426
2003-10-23 17:39:37 +00:00
f140b28c16
Change the type of FnAllocState.
...
llvm-svn: 9388
2003-10-22 20:44:29 +00:00
41fe18cbaa
Don't worry about converting each function's reg. alloc. state into One Big
...
Constant early on, because we can do it in doFinalization.
Tighten up a comment.
llvm-svn: 9387
2003-10-22 20:44:23 +00:00
f29231ec3a
Add prototype for verifySavedState().
...
llvm-svn: 9386
2003-10-22 20:23:13 +00:00
e3cf072d9e
Doxygenify method comments.
...
Try to improve method comments a little.
Get rid of some excess whitespace; put braces on previous line when possible.
Add stub for method to verify the work of saveState().
llvm-svn: 9385
2003-10-22 20:22:53 +00:00
9583cfafc5
Added LLVM copyright notice.
...
llvm-svn: 9324
2003-10-21 15:29:18 +00:00
29265fe981
Added LLVM copyright header.
...
llvm-svn: 9321
2003-10-21 15:17:13 +00:00
4436c49787
Added LLVM copyright notice to Makefiles.
...
llvm-svn: 9312
2003-10-20 22:26:57 +00:00
482202a601
Added LLVM project notice to the top of every C++ source file.
...
Header files will be on the way.
llvm-svn: 9298
2003-10-20 19:43:21 +00:00
b94550e537
Change the Opcode enum for PHI nodes from "Instruction::PHINode" to "Instruction::PHI" to be more consistent with the other instructions.
...
llvm-svn: 9269
2003-10-19 21:34:28 +00:00
9177d11367
#include vector which we will need here soon
...
llvm-svn: 9144
2003-10-15 22:09:32 +00:00
f95d9b99b3
Decrease usage of use_size()
...
llvm-svn: 9135
2003-10-15 16:48:29 +00:00
44d2c3514a
Regularize header file comments
...
llvm-svn: 9071
2003-10-13 03:32:08 +00:00
80f283b316
* Doxygenified comments
...
* Wrap code at 80 columns
* Ordered includes according to LLVM style guide
llvm-svn: 9020
2003-10-10 17:41:32 +00:00
5f1f337d95
Change MRegisterDesc::AliasSet, TargetInstrDescriptor::ImplicitDefs
...
and TargetInstrDescriptor::ImplicitUses to always point to a null
terminated array and never be null. So there is no need to check for
pointer validity when iterating over those sets. Code that looked
like:
if (const unsigned* AS = TID.ImplicitDefs) {
for (int i = 0; AS[i]; ++i) {
// use AS[i]
}
}
was changed to:
for (const unsigned* AS = TID.ImplicitDefs; *AS; ++AS) {
// use *AS
}
llvm-svn: 8960
2003-10-08 05:20:08 +00:00
5facafaabe
Moved enum and command-line option in separate file. Also added function that returns the user selected register allocator to the caller.
...
llvm-svn: 8819
2003-10-02 16:57:49 +00:00
1f8d21e233
include passes.h which defines the interface this file exposes
...
llvm-svn: 8793
2003-09-30 20:13:59 +00:00
974bc6682e
Update head-of-file comment.
...
llvm-svn: 8699
2003-09-24 18:16:23 +00:00
1542a8b820
Untabify tabs in stuff I've recently added.
...
Check in my register allocator state-saving code.
llvm-svn: 8698
2003-09-24 18:08:54 +00:00
82585e030c
Use getRegClassID() instead of getRegClass()->getID(), since it's there.
...
Shorten the markSuggestedColorUsable method.
Add a switch for saving reg. alloc. state (coming soon).
llvm-svn: 8697
2003-09-24 17:50:28 +00:00
Alkis Evlogimenos