Evan Cheng
2a533e6894
Revert 46556 and 46585. Dan please fix the PseudoSourceValue problem and re-commit.
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llvm-svn: 46623
2008-01-31 21:00:00 +00:00
Dan Gohman
4326d513ab
Create a new class, MemOperand, for describing memory references
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in the backend. Introduce a new SDNode type, MemOperandSDNode, for
holding a MemOperand in the SelectionDAG IR, and add a MemOperand
list to MachineInstr, and code to manage them. Remove the offset
field from SrcValueSDNode; uses of SrcValueSDNode that were using
it are all all using MemOperandSDNode now.
Also, begin updating some getLoad and getStore calls to use the
PseudoSourceValue objects.
Most of this was written by Florian Brander, some
reorganization and updating to TOT by me.
llvm-svn: 46585
2008-01-31 00:25:39 +00:00
Evan Cheng
07f3cd3242
A semi-gross fix for a debug info issue. When inserting the "function start" label (i.e. first label in the entry block) take care to insert it at the beginning of the block.
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llvm-svn: 46568
2008-01-30 19:35:32 +00:00
Chris Lattner
f83aae613c
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
Chris Lattner
96167aa93c
Rename SSARegMap -> MachineRegisterInfo in keeping with the idea
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that "machine" classes are used to represent the current state of
the code being compiled. Given this expanded name, we can start
moving other stuff into it. For now, move the UsedPhysRegs and
LiveIn/LoveOuts vectors from MachineFunction into it.
Update all the clients to match.
This also reduces some needless #includes, such as MachineModuleInfo
from MachineFunction.
llvm-svn: 45467
2007-12-31 04:13:23 +00:00
Chris Lattner
e0b1ee937a
Don't attribute in file headers anymore. See llvmdev for the
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discussion of this change. Boy are my fingers tired. ;-)
llvm-svn: 45411
2007-12-29 19:59:42 +00:00
Evan Cheng
de07843bf3
If a node that defines a physical register that is expensive to copy. The
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scheduler will try a number of tricks in order to avoid generating the
copies. This may not be possible in case the node produces a chain value
that prevent movement. Try unfolding the load from the node before to allow
it to be moved / cloned.
llvm-svn: 42625
2007-10-05 01:39:18 +00:00
Evan Cheng
d1a77589e9
Remove simple scheduler.
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llvm-svn: 42499
2007-10-01 20:44:07 +00:00
Evan Cheng
1a48cdc61e
If two instructions are both two-address code, favors (schedule closer to
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terminator) the one that has a CopyToReg use. This fixes
2006-05-11-InstrSched.ll with -new-cc-modeling-scheme.
llvm-svn: 42453
2007-09-28 22:32:30 +00:00
Evan Cheng
71904c241e
Trim some unneeded fields.
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llvm-svn: 42442
2007-09-28 19:24:24 +00:00
Evan Cheng
2075b448c3
Oops. Forgot this.
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llvm-svn: 42377
2007-09-26 21:38:03 +00:00
Evan Cheng
6d8f155a63
Added major new capabilities to scheduler (only BURR for now) to support physical register dependency. The BURR scheduler can now backtrace and duplicate instructions in order to avoid "expensive / impossible to copy" values (e.g. status flag EFLAGS for x86) from being clobbered.
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llvm-svn: 42284
2007-09-25 01:54:36 +00:00
Evan Cheng
4a117958df
Use struct SDep instead of std::pair for SUnit pred and succ lists. First step
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in tracking physical register output dependencies.
llvm-svn: 42125
2007-09-19 01:38:40 +00:00
Dan Gohman
cbb2ee9062
Add an option, -view-sunit-dags, for viewing the actual SUnit DAGs used by
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scheduling.
llvm-svn: 41556
2007-08-28 20:32:58 +00:00
Evan Cheng
14bd520741
Instead of adding copyfromreg's to handle physical definitions. Now isel can
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simply specify them as results and let scheduledag handle them. That
is, instead of
SDOperand Flag = DAG.getTargetNode(Opc, MVT::i32, MVT::Flag, ...)
SDOperand Result = DAG.getCopyFromReg(Chain, X86::EAX, MVT::i32, Flag)
Just write:
SDOperand Result = DAG.getTargetNode(Opc, MVT::i32, MVT::i32, ...)
And let scheduledag emit the move from X86::EAX to a virtual register.
llvm-svn: 40710
2007-08-02 00:28:15 +00:00
Christopher Lamb
08bcd5c0f8
Teach DAG scheduling how to properly emit subreg insert/extract machine instructions. PR1350
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llvm-svn: 40520
2007-07-26 08:12:07 +00:00
Evan Cheng
cf3b1c89a9
When a node value is only used by a CopyToReg, use the user's dest. This should not be restricted to nodes that produce only a single value.
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llvm-svn: 38485
2007-07-10 07:08:32 +00:00
Chris Lattner
15fb4ef992
switch the VRBaseMap in the scheduler from an std::map to a DenseMap. This
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speeds up the isel pass from 2.5570s to 2.4722s on kc++ (3.4%).
llvm-svn: 33879
2007-02-04 08:47:20 +00:00
Chris Lattner
b35593a1c5
switch the sched unit map over to use a DenseMap instead of std::map. This
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speeds up isel as a whole time by 2.6%.
llvm-svn: 33810
2007-02-03 01:34:13 +00:00
Chris Lattner
a24a3aaa94
rename DenseMap to IndexedMap.
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llvm-svn: 33749
2007-02-01 05:32:05 +00:00
Jim Laskey
64f4242072
Change the MachineDebugInfo to MachineModuleInfo to better reflect usage
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for debugging and exception handling.
llvm-svn: 33550
2007-01-26 21:22:28 +00:00
Evan Cheng
a4bfb23119
Move to operand constraints for two-address instructions.
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llvm-svn: 31452
2006-11-04 09:42:53 +00:00
Chris Lattner
a2eba83561
switch the SUnit pred/succ sets from being std::sets to being smallvectors.
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This reduces selectiondag time on kc++ from 5.43s to 4.98s (9%). More
significantly, this speeds up the default ppc scheduler from ~1571ms to 1063ms,
a 33% speedup.
llvm-svn: 29743
2006-08-17 00:09:56 +00:00
Chris Lattner
1e0b221fb2
Convert vector to smallvector: 4% speedup.
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llvm-svn: 29735
2006-08-16 22:12:48 +00:00
Jim Laskey
f9f462bc5e
Now that the ISel is available, it's possible to create a default instruction
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scheduler creator.
llvm-svn: 29452
2006-08-01 19:14:14 +00:00
Jim Laskey
f5e160063e
1. Change use of "Cache" to "Default".
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2. Added argument to instruction scheduler creators so the creators can do
special things.
3. Repaired target hazard code.
4. Misc.
More to follow.
llvm-svn: 29450
2006-08-01 18:29:48 +00:00
Jim Laskey
b92b14f422
Introducing plugable register allocators and instruction schedulers.
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llvm-svn: 29434
2006-08-01 14:21:23 +00:00
Chris Lattner
f604017e47
Patches to make the LLVM sources more -pedantic clean. Patch provided
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by Anton Korobeynikov! This is a step towards closing PR786.
llvm-svn: 28447
2006-05-24 17:04:05 +00:00
Evan Cheng
7bb257e178
Revert an un-intended change
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llvm-svn: 28278
2006-05-13 05:53:47 +00:00
Evan Cheng
0b8e4bca80
Add capability to scheduler to commute nodes for profit.
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If a two-address code whose first operand has uses below, it should be commuted
when possible.
llvm-svn: 28230
2006-05-12 01:58:24 +00:00
Evan Cheng
cb2a0f392c
Refactor scheduler code. Move register-reduction list scheduler to a
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separate file. Added an initial implementation of top-down register pressure
reduction list scheduler.
llvm-svn: 28226
2006-05-11 23:55:42 +00:00
Nate Begeman
7ed816f900
JumpTable support! What this represents is working asm and jit support for
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x86 and ppc for 100% dense switch statements when relocations are non-PIC.
This support will be extended and enhanced in the coming days to support
PIC, and less dense forms of jump tables.
llvm-svn: 27947
2006-04-22 18:53:45 +00:00
Chris Lattner
0a64d261e0
Move simple-selector-specific types to the simple selector.
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llvm-svn: 26693
2006-03-10 07:51:18 +00:00
Chris Lattner
40b1b16c56
Simplify the interface to the schedulers, to not pass the selected heuristic
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in.
llvm-svn: 26691
2006-03-10 07:48:52 +00:00
Chris Lattner
da5f77e3cf
Move some simple-sched-specific instance vars to the simple scheduler.
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llvm-svn: 26690
2006-03-10 07:42:02 +00:00
Chris Lattner
808cc02983
move some simple scheduler methods into the simple scheduler
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llvm-svn: 26688
2006-03-10 07:35:21 +00:00
Chris Lattner
89a5a946f5
Make EmitNode take a SDNode instead of a NodeInfo*
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llvm-svn: 26687
2006-03-10 07:28:36 +00:00
Chris Lattner
f1be1182f0
Store VRBase in a map, not in NodeInfo.
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llvm-svn: 26685
2006-03-10 07:24:45 +00:00
Chris Lattner
6ef56b998f
make some methods protected instead of private
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llvm-svn: 26681
2006-03-10 06:30:11 +00:00
Chris Lattner
3f23d22d3f
Change the interface for getting a target HazardRecognizer to be more clean.
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llvm-svn: 26608
2006-03-08 04:25:59 +00:00
Chris Lattner
a0769e790e
Hoist the HazardRecognizer out of the ScheduleDAGList.cpp file to where
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targets can implement them. Make the top-down scheduler non-g5-specific.
llvm-svn: 26568
2006-03-06 00:20:29 +00:00
Chris Lattner
4dae9a978e
add an emitnoop method
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llvm-svn: 26563
2006-03-05 23:50:42 +00:00
Jim Laskey
45dfae3a50
Breathe some life into a comment.
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llvm-svn: 26553
2006-03-05 21:20:20 +00:00
Chris Lattner
a171bcca08
Add a new scheduling type. This is, of course, a hack. Proper factoring
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will come later.
llvm-svn: 26551
2006-03-05 21:08:06 +00:00
Chris Lattner
291e17764d
add a method
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llvm-svn: 26357
2006-02-24 18:53:51 +00:00
Chris Lattner
ed45ad33b7
Make the LLVM headers "-ansi -pedantic -Wno-long-long" clean.
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Patch by Martin Partel!
llvm-svn: 26313
2006-02-22 16:23:43 +00:00
Evan Cheng
062ac6e46b
Get rid of some memory leaks identified by Valgrind
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llvm-svn: 25960
2006-02-04 06:49:00 +00:00
Evan Cheng
cf49c6411a
Duh.
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llvm-svn: 25628
2006-01-26 00:28:35 +00:00
Evan Cheng
168b8c5b29
No need to keep track of top and bottom nodes in a group since the vector is
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already in order. Thanks Jim for pointing it out.
llvm-svn: 25608
2006-01-25 18:54:24 +00:00
Evan Cheng
27e82023a4
Some minor scheduler changes.
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llvm-svn: 25597
2006-01-25 09:07:50 +00:00