Alkis Evlogimenos
b0b0ebaac0
Change xor to ^.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11054 91177308-0d34-0410-b5e6-96231b3b80d8
2004-02-01 08:19:25 +00:00
Chris Lattner
d4baf0f74c
Fix a bug in a recent checkin
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11050 91177308-0d34-0410-b5e6-96231b3b80d8
2004-02-01 05:25:07 +00:00
Alkis Evlogimenos
676cf8cb1d
Missed one silly assert :-)
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11048 91177308-0d34-0410-b5e6-96231b3b80d8
2004-02-01 02:21:31 +00:00
Alkis Evlogimenos
01e74a2aab
Simplify joinIntervals() code.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11047 91177308-0d34-0410-b5e6-96231b3b80d8
2004-02-01 02:18:31 +00:00
Alkis Evlogimenos
4f67b86648
Use MRegisterInfo::isPhysicalRegister and
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MRegisterInfo::isVirtualRegister.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11045 91177308-0d34-0410-b5e6-96231b3b80d8
2004-02-01 01:27:01 +00:00
Alkis Evlogimenos
52220f61bb
Apply final part of Chris' patch.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11040 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-31 23:48:47 +00:00
Alkis Evlogimenos
02ba13c989
Be a little smarter on the way we handle physical register defs.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11038 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-31 23:13:30 +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
Chris Lattner
6b50767905
Fix, correctly this time, the computation of the return value
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Fix a spello
Tighten up the assertion checking
No functionality changes.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11036 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-31 21:21:43 +00:00
Chris Lattner
163c1e7a69
* Fix incorrect computation of the runOnMachineFunction return value
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* Turn a bunch of instance variables into automatic variables
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11035 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-31 21:14:04 +00:00
Chris Lattner
bd91c1c376
Remove unneeded #includes
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Move Passes.h (which defines the interface to this file) to the top.
Move statistics to the top of the file.
Add a comment
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11034 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-31 21:07:15 +00:00
Alkis Evlogimenos
08cec00588
Merge safe parts from last night's buggy commit. These do not break
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any test cases :-)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11032 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-31 19:59:32 +00:00
Alkis Evlogimenos
97017de187
Optimize liveAt() and overlaps(). We now use a binary search instead
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of a linear search to find the first range for comparisons. This cuts
down the linear scan register allocator running time by a factor of 3
in 254.perlbmk and by a factor of 2.2 in 176.gcc.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11030 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-31 16:54:54 +00:00
Alkis Evlogimenos
4d46e1e521
Revert last night's changes as they broke some tests. Will remerge parts of the patch.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11029 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-31 14:37:41 +00:00
Alkis Evlogimenos
32bdd4ea65
Several performance enhancements and cleanups from Chris.
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Simplification of LiveIntervals::Interval::overlaps() and addition of
examples to overlaps() and liveAt() to make them clearer.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11028 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-31 04:56:07 +00:00
Chris Lattner
49a5aaacef
Finegrainify namespacification
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Implement LiveVariables::getIndexMachineBasicBlock
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11018 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-30 22:08:53 +00:00
Brian Gaeke
09caa3751f
Give clients of MachineFunctionPrinter the ability to specify a banner and
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choose an ostream.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11016 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-30 21:53:46 +00:00
Alkis Evlogimenos
79b0c3f0b9
Fix failing test cases with joined live intervals. It turns out that
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when joining we need to check if we overlap with the second interval
or any of its aliases.
Also make joining intervals the default.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10973 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-23 13:37:51 +00:00
Alkis Evlogimenos
e88280a422
Add option to join live intervals. Two intervals are joined if there
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is a move between two registers, at least one of the registers is
virtual and the two live intervals do not overlap.
This results in about 40% reduction in intervals, 30% decrease in the
register allocators running time and a 20% increase in peephole
optimizations (mainly move eliminations).
The option can be enabled by passing -join-liveintervals where
appropriate.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10965 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-22 23:08:45 +00:00
Alkis Evlogimenos
84dc5fb6ba
Remove unneeded check. An interval in active, by definition overlaps
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with the current one.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10959 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-22 20:07:18 +00:00
Alkis Evlogimenos
ce50115006
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.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10958 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-22 19:24:43 +00:00
Alkis Evlogimenos
1075ecd32f
Revert previous change. The code was correct...
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10957 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-22 19:17:52 +00:00
Alkis Evlogimenos
e1a210777d
Fix incorrect negatives in LiveIntervals::Interval::liveAt().
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10956 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-22 18:33:50 +00:00
Tanya Lattner
06723077ed
Moved iterators around.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10926 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-20 17:51:13 +00:00
Tanya Lattner
a105c802b2
Moved iterators to common file.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10925 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-20 17:49:42 +00:00
Alkis Evlogimenos
a12c7bb06f
Handle printing of intervals that are not assign to any physical
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register yet (2nd try).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10896 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-16 20:33:13 +00:00
Alkis Evlogimenos
a6d8c3f845
Handle printing of intervals that are not assign to any physical
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register yet.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10895 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-16 20:29:42 +00:00
Alkis Evlogimenos
3b02cbe752
Fold open interval ends handling into
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LiveIntervals::Interval::expiredAt() and simplify regalloc code.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10894 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-16 20:17:05 +00:00
Alkis Evlogimenos
1893a05b28
Add asserts to previous change.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10893 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-16 16:23:23 +00:00
Alkis Evlogimenos
f5f1689ed2
Use a list instead of a vector to store intervals. This will be needed
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when we join intervals and one of the two will need to be removed.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10892 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-16 16:06:59 +00:00
Chris Lattner
f907bac068
Hrm, apparently I missed lowering this intrinsic. :(
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10858 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-14 20:41:29 +00:00
Alkis Evlogimenos
d6e40a6cbc
Properly update #intervals statistic.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10847 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-14 10:44:29 +00:00
Alkis Evlogimenos
9739736b94
Fix bug in LiveIntervals::Interval::overlaps and
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LiveIntervals::Interval::liveAt. Both were considering the live ranges
closed in the end, when they are actually open.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10835 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-14 00:20:09 +00:00
Alkis Evlogimenos
5ab20273a4
Improve debugging output.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10834 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-14 00:09:36 +00:00
Alkis Evlogimenos
af25473d5e
Fix miscomputation of live intervals. The catch is that registers can
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be dead at the defining instruction but can only be killed in
subsequent ones.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10833 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-13 22:26:14 +00:00
Alkis Evlogimenos
1a119e2410
Remove allocatable registers vector. It is already provided by
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LiveVariables.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10830 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-13 22:10:43 +00:00
Alkis Evlogimenos
a3a6524965
Cleanup debugging output.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10824 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-13 21:53:20 +00:00
Alkis Evlogimenos
63841bc85d
Fix output of live intervals to show correctly its closed, open
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ranges, i.e. [a,b)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10822 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-13 21:17:47 +00:00
Alkis Evlogimenos
c55640f019
Remove unneeded check (with the recent change in live variables a use
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of a physical register is always dominated by a def).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10821 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-13 21:16:25 +00:00
Alkis Evlogimenos
b7be115140
Indentation and whitespace cleanups.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10820 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-13 20:42:08 +00:00
Alkis Evlogimenos
f7df173e3b
Fix bug introduced by previous commit: check if fixed intervals
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overlap before adding their spill weight.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10819 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-13 20:37:01 +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
b08bdc4a16
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.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10755 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-11 09:18:45 +00:00
Chris Lattner
ae7fc3aede
Remove use of llvm/CodeGen/InstrSelection.h
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10749 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-10 19:16:26 +00:00
Chris Lattner
d5da197071
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.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10731 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-09 06:30:18 +00:00
Chris Lattner
2abcf524a1
Move InstrSelection into lib/Target/Sparc, as it's sparc specific
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10730 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-09 06:24:06 +00:00
Chris Lattner
75e260990d
Move lib/Codegen/RegAlloc into lib/Target/Sparc, as it is sparc specific
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10728 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-09 06:17:12 +00:00
Alkis Evlogimenos
7d629b50a5
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% :-)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10712 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-07 09:20:58 +00:00
Alkis Evlogimenos
1283d86b63
Minor cleanups.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10711 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-07 05:31:12 +00:00
Alkis Evlogimenos
75ca6a3e82
Remove declared but undefined method.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10710 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-07 02:29:33 +00:00
Alkis Evlogimenos
80b378cf7c
Change implementation of LiveIntervals::overlap(). This results in a
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30-50% decrease in running time of the linear scan register allocator.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10707 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-07 01:45:58 +00:00
Alkis Evlogimenos
63caedf046
Remove simple coalescing.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10695 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-05 08:24:57 +00:00
Chris Lattner
8c2403631b
fix warning
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10692 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-05 05:42:17 +00:00
Chris Lattner
77b1330ece
Add VMCore and code generator support for debugging intrinsics. By default
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code generators completely ignore them.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10691 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-05 05:36:30 +00:00
Alkis Evlogimenos
271bd2d7f1
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.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10682 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-05 02:25:45 +00:00
Alkis Evlogimenos
50c047d159
Update description.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10681 91177308-0d34-0410-b5e6-96231b3b80d8
2004-01-04 23:09:24 +00:00
Chris Lattner
f70e0c216c
Clean up a lot of the code I added yesterday by exposing the IntrinsicLowering
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implementation from the TargetMachine directly.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10636 91177308-0d34-0410-b5e6-96231b3b80d8
2003-12-28 21:23:38 +00:00
Alkis Evlogimenos
27490a6fcc
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.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10635 91177308-0d34-0410-b5e6-96231b3b80d8
2003-12-28 18:03:52 +00:00
Alkis Evlogimenos
26bfc08b80
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.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10634 91177308-0d34-0410-b5e6-96231b3b80d8
2003-12-28 17:58:18 +00:00
Chris Lattner
aed386e6b0
Whoops, don't try to lower non intrinsic calls
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10632 91177308-0d34-0410-b5e6-96231b3b80d8
2003-12-28 09:53:23 +00:00
Chris Lattner
f8742b3e03
Use the intrinsic lowering functionality
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10626 91177308-0d34-0410-b5e6-96231b3b80d8
2003-12-28 09:43:35 +00:00
Chris Lattner
42450d8a5f
Move into the VMCore library
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10623 91177308-0d34-0410-b5e6-96231b3b80d8
2003-12-28 08:30:20 +00:00
Chris Lattner
3b66ecb05f
Implement the default implementation of the intrinsic lowering class
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10621 91177308-0d34-0410-b5e6-96231b3b80d8
2003-12-28 08:19:41 +00:00
Chris Lattner
aa4c91ff96
finegrainify namespacification
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minor cleanups
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10619 91177308-0d34-0410-b5e6-96231b3b80d8
2003-12-28 07:59:53 +00:00
Alkis Evlogimenos
843397c237
Improve debugging output when choosing a register to spill.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10604 91177308-0d34-0410-b5e6-96231b3b80d8
2003-12-24 18:53:31 +00:00
Alkis Evlogimenos
7a40eaacee
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).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10603 91177308-0d34-0410-b5e6-96231b3b80d8
2003-12-24 15:44:53 +00:00
Alkis Evlogimenos
3bf564a95f
Change the way free regusters are computed and perform better
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allocation in the presence of preallocated intervals.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10595 91177308-0d34-0410-b5e6-96231b3b80d8
2003-12-23 18:00:33 +00:00
Alkis Evlogimenos
056063e264
Fix crash when compiling twolf.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10584 91177308-0d34-0410-b5e6-96231b3b80d8
2003-12-22 13:54:29 +00:00
Alkis Evlogimenos
4de1fefd7c
Remove verifyIntervals() since it doesn't actually work right now.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10570 91177308-0d34-0410-b5e6-96231b3b80d8
2003-12-21 20:41:26 +00:00
Alkis Evlogimenos
6b4edbaaf9
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 );
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10569 91177308-0d34-0410-b5e6-96231b3b80d8
2003-12-21 20:19:10 +00:00
Alkis Evlogimenos
169cfd0196
Add support for inactive intervals. This effectively reuses registers
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for live ranges that fall into assigned registers' holes.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10566 91177308-0d34-0410-b5e6-96231b3b80d8
2003-12-21 05:43:40 +00:00
Chris Lattner
16c45e9de8
Add a new target-independent machine code freeing pass
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10560 91177308-0d34-0410-b5e6-96231b3b80d8
2003-12-20 10:20:58 +00:00
Chris Lattner
07f32d48f1
* 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.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10553 91177308-0d34-0410-b5e6-96231b3b80d8
2003-12-20 09:17:07 +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
Chris Lattner
5e46b513f3
Prune some #includes
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Add a statistic for # reloads
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10518 91177308-0d34-0410-b5e6-96231b3b80d8
2003-12-18 20:25:31 +00:00
Alkis Evlogimenos
a71e05acdd
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.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10515 91177308-0d34-0410-b5e6-96231b3b80d8
2003-12-18 13:15:02 +00:00
Alkis Evlogimenos
a3d0e5c2b2
Fix bug in reserved registers. DH actually aliases DX and EDX which
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are not reserved registers.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10514 91177308-0d34-0410-b5e6-96231b3b80d8
2003-12-18 13:12:18 +00:00
Alkis Evlogimenos
9af9dbde7d
Modify local register allocator to use the two-address instruction pass.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10513 91177308-0d34-0410-b5e6-96231b3b80d8
2003-12-18 13:08:52 +00:00
Alkis Evlogimenos
71499ded4d
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.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10512 91177308-0d34-0410-b5e6-96231b3b80d8
2003-12-18 13:06:04 +00:00
Alkis Evlogimenos
485ec3c21e
Rename LiveIntervals::expired() to LiveIntervals::expiredAt().
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10511 91177308-0d34-0410-b5e6-96231b3b80d8
2003-12-18 08:56:11 +00:00
Alkis Evlogimenos
43f692f90f
When a variable is killed and redifined in a basic block only one
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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.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10510 91177308-0d34-0410-b5e6-96231b3b80d8
2003-12-18 08:53:43 +00:00
Alkis Evlogimenos
dd2cc65f34
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.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10509 91177308-0d34-0410-b5e6-96231b3b80d8
2003-12-18 08:48:48 +00:00
Alkis Evlogimenos
f6f91bf668
Change preserve all claim to just preserve live variables and phielimination.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10469 91177308-0d34-0410-b5e6-96231b3b80d8
2003-12-15 04:55:38 +00:00
Alkis Evlogimenos
4d7af65903
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.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10461 91177308-0d34-0410-b5e6-96231b3b80d8
2003-12-14 13:24:17 +00:00
Alkis Evlogimenos
94743e4915
When reserving a preallocated register spill the aliases of this
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register too.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10450 91177308-0d34-0410-b5e6-96231b3b80d8
2003-12-13 11:58:10 +00:00
Alkis Evlogimenos
4c214d2bf0
Ignore non-allocatable physical registers in live interval analysis.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10449 91177308-0d34-0410-b5e6-96231b3b80d8
2003-12-13 11:11:02 +00:00
Alkis Evlogimenos
7d65a12fe6
Expire any active intervals left when register allocation is done.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10448 91177308-0d34-0410-b5e6-96231b3b80d8
2003-12-13 05:50:19 +00:00
Alkis Evlogimenos
f6e610c27d
Add instruction numbers to debugging output.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10447 91177308-0d34-0410-b5e6-96231b3b80d8
2003-12-13 05:48:57 +00:00
Alkis Evlogimenos
9435eda699
Handle explicit physical register defs.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10445 91177308-0d34-0410-b5e6-96231b3b80d8
2003-12-13 05:26:39 +00:00
Alkis Evlogimenos
efe995a406
Remove unecessary if statements when looping on ImplicitDefs.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10444 91177308-0d34-0410-b5e6-96231b3b80d8
2003-12-13 01:20:58 +00:00
John Criswell
f5ba89df1f
This appears to fix Bug 172 and does not break any other feature tests or
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regression tests.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10388 91177308-0d34-0410-b5e6-96231b3b80d8
2003-12-10 22:51:41 +00:00
Alkis Evlogimenos
a327e7fea9
Make assertion stricter. Since the source operands are allocated at
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this point, the second operand must be a physical register (it cannot
be a virtual one).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10292 91177308-0d34-0410-b5e6-96231b3b80d8
2003-12-05 11:31:39 +00:00
Alkis Evlogimenos
49787e35c3
Fix bug in register spilling when a preallocated live range overlaps a
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potential register assignment.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10291 91177308-0d34-0410-b5e6-96231b3b80d8
2003-12-05 11:17:55 +00:00
Alkis Evlogimenos
b27ef248f5
Move operator<<(std::ostream&, const LiveInterval&) out of the header file.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10290 91177308-0d34-0410-b5e6-96231b3b80d8
2003-12-05 10:38:28 +00:00
Alkis Evlogimenos
91ceae6d20
Sort live intervals by increasing start point.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10289 91177308-0d34-0410-b5e6-96231b3b80d8
2003-12-05 10:32:01 +00:00
Alkis Evlogimenos
69546d5f84
Improve debugging output and clean up some code.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10288 91177308-0d34-0410-b5e6-96231b3b80d8
2003-12-04 03:57:28 +00:00
Alkis Evlogimenos
585870759b
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.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10272 91177308-0d34-0410-b5e6-96231b3b80d8
2003-11-30 23:40:39 +00:00
Alkis Evlogimenos
99d1a8f048
Remove "numReloaded" statistic.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10268 91177308-0d34-0410-b5e6-96231b3b80d8
2003-11-30 05:15:36 +00:00
Alkis Evlogimenos
ff0cbe175d
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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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10103 91177308-0d34-0410-b5e6-96231b3b80d8
2003-11-20 03:32:25 +00:00
Brian Gaeke
d0fde30ce8
Put all LLVM code into the llvm namespace, as per bug 109.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@9903 91177308-0d34-0410-b5e6-96231b3b80d8
2003-11-11 22:41:34 +00:00