e1c24c06f9
Remove unneeded check. An interval in active, by definition overlaps
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with the current one.
llvm-svn: 10959
2004-01-22 20:07:18 +00:00
4716d76d22
Improve debugging output. Remove unneeded virtReg->0 mapping when
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virtReg lives on the stack. Now a virtual register has an entry in the
virtual->physical map or the virtual->stack slot map but never in
both.
llvm-svn: 10958
2004-01-22 19:24:43 +00:00
d844972574
Handle printing of intervals that are not assign to any physical
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register yet (2nd try).
llvm-svn: 10896
2004-01-16 20:33:13 +00:00
8672af1cc8
Handle printing of intervals that are not assign to any physical
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register yet.
llvm-svn: 10895
2004-01-16 20:29:42 +00:00
d86933d21d
Fold open interval ends handling into
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LiveIntervals::Interval::expiredAt() and simplify regalloc code.
llvm-svn: 10894
2004-01-16 20:17:05 +00:00
a0865cec3f
Improve debugging output.
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llvm-svn: 10834
2004-01-14 00:09:36 +00:00
65bc990bda
Indentation and whitespace cleanups.
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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
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
2fa1aef707
Remove simple coalescing.
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llvm-svn: 10695
2004-01-05 08:24:57 +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
2e8c984c58
Improve debugging output when choosing a register to spill.
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llvm-svn: 10604
2003-12-24 18:53:31 +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
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
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
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are not reserved registers.
llvm-svn: 10514
2003-12-18 13:12:18 +00:00
4d87219486
Rename LiveIntervals::expired() to LiveIntervals::expiredAt().
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llvm-svn: 10511
2003-12-18 08:56:11 +00:00
aaba4639f8
Change interface of MachineOperand as follows:
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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
ed53b35076
Expire any active intervals left when register allocation is done.
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llvm-svn: 10448
2003-12-13 05:50:19 +00:00
e6dc614c3c
Add instruction numbers to debugging output.
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llvm-svn: 10447
2003-12-13 05:48:57 +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
5fe0031c68
Improve debugging output and clean up some code.
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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.
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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.
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llvm-svn: 10103
2003-11-20 03:32:25 +00:00
Alkis Evlogimenos