Owen Anderson
0966f0f0e4
Fix the build. Apparently MachineInstr& is no longer implicitly convertable to MachineBasicBlock::iterator.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53260 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-08 23:36:37 +00:00
Owen Anderson
491fccc4b4
Make the local register allocator compute (purely local) liveness information for itself
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rather than depending on LiveVariables. This decreases compile time from:
0.5909s (LV + Regalloc) to 0.421s (just regalloc).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53256 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-08 22:24:50 +00:00
Evan Cheng
33d3d4ad40
Teach local register allocator to deal with landing pad MBB's.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51647 91177308-0d34-0410-b5e6-96231b3b80d8
2008-05-28 17:22:32 +00:00
Dan Gohman
844731a7f1
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.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51017 91177308-0d34-0410-b5e6-96231b3b80d8
2008-05-13 00:00:25 +00:00
Evan Cheng
1088317675
Remove #include<map> from LiveVariables.h. Not referenced.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49099 91177308-0d34-0410-b5e6-96231b3b80d8
2008-04-02 17:23:50 +00:00
Evan Cheng
6130f66eaa
Refactor code. Remove duplicated functions that basically do the same thing as
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findRegisterUseOperandIdx, findRegisterDefOperandIndx. Fix some naming inconsistencies.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47927 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-05 00:59:57 +00:00
Bill Wendling
97e3c01eb4
If we reload a virtual register that's already been assigned, we want to mark
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that instruction as its "last use". This fixes PR1925.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47758 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-29 18:52:01 +00:00
Bill Wendling
e6d088acc9
Rename PrintableName to Name.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47629 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-26 21:47:57 +00:00
Bill Wendling
74ab84c31e
Change "Name" to "AsmName" in the target register info. Gee, a refactoring tool
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would have been a Godsend here!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47625 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-26 21:11:01 +00:00
Evan Cheng
bcfa1ca976
Really really bad local register allocator bug. On X86, it was never using ESI, EDI, and EBP because of a bug in RALocal::isPhysRegAvailable(). For example, when
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it checks if ESI is available, it then looks at registers aliases to ESI. SIL is marked -2 (not allocatable) but isPhysRegAvailable() incorrectly assumes it is in use and returns false for ESI.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47499 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-22 20:30:53 +00:00
Evan Cheng
9af7090392
Add debugging printfs.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47496 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-22 19:57:06 +00:00
Anton Korobeynikov
4aefd6b7d4
Fix newly-introduced 4.3 warnings
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47375 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-20 12:07:57 +00:00
Evan Cheng
431bfcbe37
Determine whether a spill kills the register it's spilling before insertion rather than trying to undo the kill marker afterwards.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46953 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-11 08:30:52 +00:00
Dan Gohman
6f0d024a53
Rename MRegisterInfo to TargetRegisterInfo.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46930 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-10 18:45:23 +00:00
Evan Cheng
27240c7d50
Remove remnant of load folding in local register allocator. Patch by Holger Schurig.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46861 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-07 19:46:55 +00:00
Evan Cheng
2fc628d662
Fix a number of local register allocator issues: PR1609.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46821 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-06 19:16:53 +00:00
Evan Cheng
22ff3eeebe
RegAllocaLocal still *requires* LiveVariables since it runs PHIElimination, followed by TwoAddress which requires LiveVariables. We cannot run LiveVariables on non-SSA code.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46813 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-06 08:00:32 +00:00
Owen Anderson
c66a4f912f
Reg alloc doesn't really need LiveVariables.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46420 91177308-0d34-0410-b5e6-96231b3b80d8
2008-01-27 22:00:00 +00:00
Evan Cheng
839b759c38
When a live virtual register is being clobbered by an implicit def, it is spilled
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and the spill is its kill. However, if the local allocator has determined the
register has not been modified (possible when its value was reloaded), it would
not issue a restore. In that case, mark the last use of the virtual register as
kill.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46111 91177308-0d34-0410-b5e6-96231b3b80d8
2008-01-17 02:08:17 +00:00
Evan Cheng
644340a9bd
Replace std::vector<bool> with BitVector.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46104 91177308-0d34-0410-b5e6-96231b3b80d8
2008-01-17 00:35:26 +00:00
Chris Lattner
749c6f6b5e
rename TargetInstrDescriptor -> TargetInstrDesc.
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Make MachineInstr::getDesc return a reference instead
of a pointer, since it can never be null.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45695 91177308-0d34-0410-b5e6-96231b3b80d8
2008-01-07 07:27:27 +00:00
Owen Anderson
6425f8be72
Update CodeGen for MRegisterInfo --> TargetInstrInfo changes.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45673 91177308-0d34-0410-b5e6-96231b3b80d8
2008-01-07 01:35:56 +00:00
Owen Anderson
f6372aa1cc
Move some more instruction creation methods from RegisterInfo into InstrInfo.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45484 91177308-0d34-0410-b5e6-96231b3b80d8
2008-01-01 21:11:32 +00:00
Chris Lattner
84bc5427d6
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.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45467 91177308-0d34-0410-b5e6-96231b3b80d8
2007-12-31 04:13:23 +00:00
Chris Lattner
4ee451de36
Remove attribution from file headers, per discussion on llvmdev.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45418 91177308-0d34-0410-b5e6-96231b3b80d8
2007-12-29 20:36:04 +00:00
Evan Cheng
d64b5c82b9
Add a argument to storeRegToStackSlot and storeRegToAddr to specify whether
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the stored register is killed.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44600 91177308-0d34-0410-b5e6-96231b3b80d8
2007-12-05 03:14:33 +00:00
Evan Cheng
aee4af68ae
Remove redundant foldMemoryOperand variants and other code clean up.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44517 91177308-0d34-0410-b5e6-96231b3b80d8
2007-12-02 08:30:39 +00:00
Evan Cheng
76500d52be
Add missing paratheses.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43227 91177308-0d34-0410-b5e6-96231b3b80d8
2007-10-22 19:42:28 +00:00
Evan Cheng
7ac19afbb1
Correctly handle implcit def / use operands.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37740 91177308-0d34-0410-b5e6-96231b3b80d8
2007-06-26 21:05:13 +00:00
Bill Wendling
e23e00ddea
Change names from RA to something unique to get rid of naming conflicts with
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certain linkers...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36944 91177308-0d34-0410-b5e6-96231b3b80d8
2007-05-08 19:02:46 +00:00
Devang Patel
1997473cf7
Drop 'const'
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36662 91177308-0d34-0410-b5e6-96231b3b80d8
2007-05-03 01:11:54 +00:00
Devang Patel
3e15bf33e0
Use 'static const char' instead of 'static const int'.
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Due to darwin gcc bug, one version of darwin linker coalesces
static const int, which defauts PassID based pass identification.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36652 91177308-0d34-0410-b5e6-96231b3b80d8
2007-05-02 21:39:20 +00:00
Devang Patel
794fd75c67
Do not use typeinfo to identify pass in pass manager.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36632 91177308-0d34-0410-b5e6-96231b3b80d8
2007-05-01 21:15:47 +00:00
Evan Cheng
6c087e5585
Match MachineFunction::UsedPhysRegs changes.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36452 91177308-0d34-0410-b5e6-96231b3b80d8
2007-04-25 22:13:27 +00:00
Evan Cheng
61de82d885
Use BitVector instead of vector<bool> which can be extremely slow.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34302 91177308-0d34-0410-b5e6-96231b3b80d8
2007-02-15 05:59:24 +00:00
Chris Lattner
94c002a190
rename DenseMap to IndexedMap.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33749 91177308-0d34-0410-b5e6-96231b3b80d8
2007-02-01 05:32:05 +00:00
Chris Lattner
cd3245ac45
Eliminate static ctors from Statistics
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32698 91177308-0d34-0410-b5e6-96231b3b80d8
2006-12-19 22:41:21 +00:00
Bill Wendling
832171cb97
Removing even more <iostream> includes.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32320 91177308-0d34-0410-b5e6-96231b3b80d8
2006-12-07 20:04:42 +00:00
Chris Lattner
ac0b6ae358
Detemplatize the Statistic class. The only type it is instantiated with
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is 'unsigned'.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32279 91177308-0d34-0410-b5e6-96231b3b80d8
2006-12-06 17:46:33 +00:00
Bill Wendling
b2b9c20b61
More removal of std::cerr and DEBUG, replacing with DOUT instead.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31806 91177308-0d34-0410-b5e6-96231b3b80d8
2006-11-17 02:09:07 +00:00
Evan Cheng
ddee842062
Match live variable changes.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31762 91177308-0d34-0410-b5e6-96231b3b80d8
2006-11-15 20:55:15 +00:00
Evan Cheng
438f7bc67c
Add implicit def / use operands to MachineInstr.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31633 91177308-0d34-0410-b5e6-96231b3b80d8
2006-11-10 08:43:01 +00:00
Chris Lattner
2b41b8e870
Fix UnitTests/2005-05-12-Int64ToFP.c with llc-beta. In particular, do not
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allow it to go into an infinite loop, filling up the disk!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30494 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-19 18:02:01 +00:00
Chris Lattner
0c5b8dac79
Non-allocatable physregs can be killed and dead, but don't treat them as
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safe for later allocation. This fixes McCat/18-imp with llc-beta.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30204 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-08 20:21:31 +00:00
Chris Lattner
cc406328bf
This fixes Benchmarks/Prolangs-C/unix-smail
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30198 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-08 19:11:11 +00:00
Chris Lattner
45d5788123
Fix a bunch of llc-beta failures on x86 yesterday. Don't allow selection
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of unallocatable registers, just because an alias is allocatable. We were
picking registers like SIL just because ESI was being used.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30197 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-08 19:03:30 +00:00
Evan Cheng
5d8062bcee
Only call isUse/isDef on register operands
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30122 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-05 20:32:06 +00:00
Chris Lattner
5e50349070
Fix Regression/CodeGen/Generic/2006-09-02-LocalAllocCrash.ll on X86.
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Just because an alias of a register is available, it doesn't mean that we
can arbitrarily evict the register.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30064 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-03 07:15:37 +00:00
Chris Lattner
2ac0d43fa2
When deleting a machine instruction, make sure to remove it from the
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livevariables information. This fixes several regalloc=local failures on x86
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30062 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-03 00:06:08 +00:00
Chris Lattner
a4f0b3a084
s|llvm/Support/Visibility.h|llvm/Support/Compiler.h|
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29911 91177308-0d34-0410-b5e6-96231b3b80d8
2006-08-27 12:54:02 +00:00
Jim Laskey
eb577ba3b8
Final polish on machine pass registries.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29471 91177308-0d34-0410-b5e6-96231b3b80d8
2006-08-02 12:30:23 +00:00
Jim Laskey
13ec702c43
Introducing plugable register allocators and instruction schedulers.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29434 91177308-0d34-0410-b5e6-96231b3b80d8
2006-08-01 14:21:23 +00:00
Jim Laskey
cd4317efcf
Eliminate data relocations by using NULL instead of global empty list.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29250 91177308-0d34-0410-b5e6-96231b3b80d8
2006-07-21 21:15:20 +00:00
Andrew Lenharth
ae6153f943
80 cols
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29221 91177308-0d34-0410-b5e6-96231b3b80d8
2006-07-20 17:43:27 +00:00
Andrew Lenharth
ed41f1bb19
Reduce number of exported symbols
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29220 91177308-0d34-0410-b5e6-96231b3b80d8
2006-07-20 17:28:38 +00:00
Chris Lattner
9525528a7d
Use hidden visibility to make symbols in an anonymous namespace get
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dropped. This shrinks libllvmgcc.dylib another 67K
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28975 91177308-0d34-0410-b5e6-96231b3b80d8
2006-06-28 23:17:24 +00:00
Chris Lattner
44500e3d53
Teach the local allocator to know that live-in values (e.g. arguments) are
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live at function entry. This prevents it from using arg registers for other
purposes before the arguments are used.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28809 91177308-0d34-0410-b5e6-96231b3b80d8
2006-06-15 22:21:53 +00:00
Chris Lattner
e53f4a055f
Move some methods out of MachineInstr into MachineOperand
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28102 91177308-0d34-0410-b5e6-96231b3b80d8
2006-05-04 17:52:23 +00:00
Chris Lattner
2c2c6c61f1
Add explicit #includes of <iostream>
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25515 91177308-0d34-0410-b5e6-96231b3b80d8
2006-01-22 23:41:00 +00:00
Chris Lattner
e6a88ac1b9
Nuke noop copies.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24258 91177308-0d34-0410-b5e6-96231b3b80d8
2005-11-09 18:22:42 +00:00
Chris Lattner
9a5ef20f5e
Disable some overly-aggressive checking code. This speeds up the local
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allocator from 23s to 11s on kc++ in debug mode.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24255 91177308-0d34-0410-b5e6-96231b3b80d8
2005-11-09 05:28:45 +00:00
Chris Lattner
bf9716b9c4
Change this code ot pass register classes into the stack slot spiller/reloader
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code. PrologEpilogInserter hasn't been updated yet though, so targets cannot
use this info.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23536 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-30 01:29:00 +00:00
Chris Lattner
44b94c2185
adjust to new live variables interface
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22992 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-23 23:42:17 +00:00
Misha Brukman
edf128a7fa
Remove trailing whitespace
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21420 91177308-0d34-0410-b5e6-96231b3b80d8
2005-04-21 22:36:52 +00:00
Chris Lattner
0648b16c48
Update this pass to set PhysRegsUsed info in MachineFunction.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19792 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-23 22:51:56 +00:00
Chris Lattner
27f291600b
Clean up the MachineBasicBlock.h file, percolating #includes into this file.
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Patch contributed by Morten Ofstad
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17251 91177308-0d34-0410-b5e6-96231b3b80d8
2004-10-26 15:35:58 +00:00
Reid Spencer
551ccae044
Changes For Bug 352
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Move include/Config and include/Support into include/llvm/Config,
include/llvm/ADT and include/llvm/Support. From here on out, all LLVM
public header files must be under include/llvm/.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16137 91177308-0d34-0410-b5e6-96231b3b80d8
2004-09-01 22:55:40 +00:00
Chris Lattner
3bba026994
Reduce usage of MRegisterInfo::getRegClass
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15784 91177308-0d34-0410-b5e6-96231b3b80d8
2004-08-15 22:23:09 +00:00
Chris Lattner
3cc03be51a
Nuke ifdef'd out code
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15777 91177308-0d34-0410-b5e6-96231b3b80d8
2004-08-15 22:03:57 +00:00
Chris Lattner
26eb14ba51
Stop using CreateStackObject(RegClass*)
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15775 91177308-0d34-0410-b5e6-96231b3b80d8
2004-08-15 22:02:22 +00:00
Chris Lattner
57f1b67c34
These methods no longer take a TargetRegisterClass* operand.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15774 91177308-0d34-0410-b5e6-96231b3b80d8
2004-08-15 21:56:44 +00:00
Brian Gaeke
7848e68c16
These files don't need to include <iostream> since they include "Support/Debug.h".
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15089 91177308-0d34-0410-b5e6-96231b3b80d8
2004-07-21 20:50:33 +00:00
Chris Lattner
aebcce8404
Fix a recent regression in Applications/sgefa that Alkis pointed out to me.
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The vector may actually be empty if the register that we are marking as
recently used is not actually allocatable. This happens for physical registers
that are not allocatable, like the ST(x) registers on X86.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14195 91177308-0d34-0410-b5e6-96231b3b80d8
2004-06-16 06:57:29 +00:00
Chris Lattner
9bcdcd17c7
Adjust to new TargetMachine interface
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13956 91177308-0d34-0410-b5e6-96231b3b80d8
2004-06-02 05:57:12 +00:00
Alkis Evlogimenos
39354c99a1
Change MRegisterInfo::foldMemoryOperand to return the folded
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instruction to make the API more flexible.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12386 91177308-0d34-0410-b5e6-96231b3b80d8
2004-03-14 07:19:51 +00:00
Alkis Evlogimenos
71e353ed35
Uncomment assertions that register# != 0 on calls to
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MRegisterInfo::is{Physical,Virtual}Register. Apply appropriate fixes
to relevant files.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11882 91177308-0d34-0410-b5e6-96231b3b80d8
2004-02-26 22:00:20 +00:00
Chris Lattner
7b1af15612
No need to clear the map here, it will always be empty
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11868 91177308-0d34-0410-b5e6-96231b3b80d8
2004-02-26 05:21:21 +00:00
Alkis Evlogimenos
4d0d864be3
Add DenseMap template and actually use it for for mapping virtual regs
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to objects.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11840 91177308-0d34-0410-b5e6-96231b3b80d8
2004-02-25 21:55:45 +00:00
Alkis Evlogimenos
743d0a1f83
Refactor rewinding code for finding the first terminator of a basic
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block into MachineBasicBlock::getFirstTerminator().
This also fixes a bug in the implementation of the above in both
RegAllocLocal and InstrSched, where instructions where added after the
terminator if the basic block's only instruction was a terminator (it
shouldn't matter for RegAllocLocal since this case never occurs in
practice).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11748 91177308-0d34-0410-b5e6-96231b3b80d8
2004-02-23 18:14:48 +00:00
Chris Lattner
d0d1c8f830
Another bug fix for empty MBB's
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11716 91177308-0d34-0410-b5e6-96231b3b80d8
2004-02-22 19:37:31 +00:00
Chris Lattner
688c8252d2
Fix a bug where we were implicitly assuming that there would be at least
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one terminator instruction in each basic block.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11714 91177308-0d34-0410-b5e6-96231b3b80d8
2004-02-22 19:08:15 +00:00
Alkis Evlogimenos
d6f6d1a80d
Make 'fold' statistic's description the same in both allocators.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11687 91177308-0d34-0410-b5e6-96231b3b80d8
2004-02-21 18:07:33 +00:00
Chris Lattner
d368c6163a
Fix problem fusing spill code into instructions: we didn't update the live
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variable information to take into account the change of instruction
address.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11628 91177308-0d34-0410-b5e6-96231b3b80d8
2004-02-19 18:34:02 +00:00
Alkis Evlogimenos
2acef2da06
Rename reloads/spills to loads/stores.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11619 91177308-0d34-0410-b5e6-96231b3b80d8
2004-02-19 06:19:09 +00:00
Chris Lattner
56ddada278
Remove the -disable-kill option. The register allocator is buggy with it,
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and it was only for debugging in the first place.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11557 91177308-0d34-0410-b5e6-96231b3b80d8
2004-02-17 17:49:10 +00:00
Chris Lattner
11390e76e7
Add support to the local allocator for fusing spill code into the instructions
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that need them. This is very useful on CISCy targets like the X86 because it
reduces the total spill pressure, and makes better use of it's (large)
instruction set. Though the X86 backend doesn't know how to rewrite many
instructions yet, this already makes a substantial difference on 176.gcc for
example:
Before:
Time:
8.0099 ( 31.2%) 0.0100 ( 12.5%) 8.0199 ( 31.2%) 7.7186 ( 30.0%) Local Register Allocator
Code quality:
734559 asm-printer - Number of machine instrs printed
111395 ra-local - Number of registers reloaded
79902 ra-local - Number of registers spilled
231554 x86-peephole - Number of peephole optimization performed
After:
Time:
7.8700 ( 30.6%) 0.0099 ( 19.9%) 7.8800 ( 30.6%) 7.7892 ( 30.2%) Local Register Allocator
Code quality:
733083 asm-printer - Number of machine instrs printed
2379 ra-local - Number of reloads fused into instructions
109046 ra-local - Number of registers reloaded
79881 ra-local - Number of registers spilled
230658 x86-peephole - Number of peephole optimization performed
So by fusing 2300 instructions, we reduced the static number of instructions
by 1500, and reduces the number of peepholes (and thus the work) by about 900.
This also clearly reduces the number of reload/spill instructions that are
emitted.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11542 91177308-0d34-0410-b5e6-96231b3b80d8
2004-02-17 08:09:40 +00:00
Chris Lattner
cdee28724e
Fix a bug in my previous refactoring change... arg!
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11535 91177308-0d34-0410-b5e6-96231b3b80d8
2004-02-17 07:02:17 +00:00
Chris Lattner
1e3812c1c5
Once we have a way to fold spill code reloads into instructions, we have a way to use it. :)
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11517 91177308-0d34-0410-b5e6-96231b3b80d8
2004-02-17 04:08:37 +00:00
Chris Lattner
42e0a8fded
Refactor code a bit. No functionality changes, though the comment hints at things to come.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11515 91177308-0d34-0410-b5e6-96231b3b80d8
2004-02-17 03:57:19 +00:00
Alkis Evlogimenos
859a18b583
Make dense maps keyed on physical registers smallerusing
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MRegisterInfo::getNumRegs() instead of
MRegisterInfo::FirstVirtualRegister.
Also use MRegisterInfo::is{Physical,Virtual}Register where
appropriate.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11477 91177308-0d34-0410-b5e6-96231b3b80d8
2004-02-15 21:37:17 +00:00
Alkis Evlogimenos
be766c7246
Remove getAllocatedRegNum(). Use getReg() instead.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11393 91177308-0d34-0410-b5e6-96231b3b80d8
2004-02-13 21:01:20 +00:00
Alkis Evlogimenos
4de473bc59
Use getNumVirtualRegs().
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Whitespace cleanups.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11389 91177308-0d34-0410-b5e6-96231b3b80d8
2004-02-13 18:20:47 +00:00
Alkis Evlogimenos
c0b9dc5be7
Change MachineBasicBlock's vector of MachineInstr pointers into an
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ilist of MachineInstr objects. This allows constant time removal and
insertion of MachineInstr instances from anywhere in each
MachineBasicBlock. It also allows for constant time splicing of
MachineInstrs into or out of MachineBasicBlocks.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11340 91177308-0d34-0410-b5e6-96231b3b80d8
2004-02-12 02:27:10 +00:00
Chris Lattner
1cbe4d0ad0
Do not use MachineOperand::isVirtualRegister either!
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11283 91177308-0d34-0410-b5e6-96231b3b80d8
2004-02-10 21:12:22 +00:00
Chris Lattner
3d878d80d6
Eliminate users of MachineOperand::isPhysicalRegister
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11278 91177308-0d34-0410-b5e6-96231b3b80d8
2004-02-10 20:41:10 +00:00
Chris Lattner
ecea5635f8
Another nice speedup for the register allocator. This time, we replace
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the Virt2PhysRegMap std::map with an std::vector. This speeds up the
register allocator another (almost) 40%, from .72->.45s in a release build
of LLC on 253.perlbmk.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11219 91177308-0d34-0410-b5e6-96231b3b80d8
2004-02-09 02:12:04 +00:00
Chris Lattner
64667b6418
Change the PhysRegsUsed map into a dense array. Seeing that this is a mapping
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from physical registers, and they are always dense, it makes sense to not have
a ton of RBtree overhead. This change speeds up regalloclocal about ~30% on
253.perlbmk, from .35s -> .27s in the JIT (in LLC, it goes from .74 -> .55).
Now live variable analysis is the slowest codegen pass. Of course it doesn't
help that we have to run it twice, because regalloclocal doesn't update it,
but even if it did it would be the slowest pass (now it's just the 2x slowest
pass :(
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11215 91177308-0d34-0410-b5e6-96231b3b80d8
2004-02-09 01:26:13 +00:00
Chris Lattner
ef09c63e7b
Finegrainify namespacification, use new MRegisterInfo::isVirtualRegister
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method
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11037 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-31 21:27:19 +00:00
Alkis Evlogimenos
19b6486d38
Correctly compute live variable information for physical registers
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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.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10813 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-13 06:24:30 +00:00
Alkis Evlogimenos
4c080863de
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.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10520 91177308-0d34-0410-b5e6-96231b3b80d8
2003-12-18 22:40:24 +00:00