e79e854c5c
Refactor some code. In the mul - setcc folding case, we really care about
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whether this is the sign bit or not, so check unsigned comparisons as well.
llvm-svn: 11740
2004-02-23 06:38:22 +00:00
6ddaa24dd9
Handle the unsigned form as well
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llvm-svn: 11739
2004-02-23 06:37:33 +00:00
f83cb74b57
Improved PhysRegTracker interface. RegAlloc lazily allocates the register tracker using a std::auto_ptr
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llvm-svn: 11738
2004-02-23 06:10:13 +00:00
c8a10c4b6a
Implement mul.ll:test11
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llvm-svn: 11737
2004-02-23 06:00:11 +00:00
fb302df02c
Add a slight variant of test10
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llvm-svn: 11736
2004-02-23 05:59:52 +00:00
59611149ee
Implement "strength reduction" of X <= C and X >= C
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llvm-svn: 11735
2004-02-23 05:47:48 +00:00
2635b52d4e
Implement InstCombine/mul.ll:test10, which is a case that occurs when dealing
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with "predication"
llvm-svn: 11734
2004-02-23 05:39:21 +00:00
d0ffbe1cbe
This multiply can be eliminated
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llvm-svn: 11733
2004-02-23 05:38:47 +00:00
c31ff795d5
Simplify iterator usage now that we have next(). Also don't pass iterators by reference now that MachineInstr* are in an ilist
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llvm-svn: 11732
2004-02-23 04:12:30 +00:00
e0f79a6a55
Update the 'new features' section
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llvm-svn: 11731
2004-02-23 03:51:34 +00:00
c6acc1076e
Bug fixed
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llvm-svn: 11730
2004-02-23 03:36:36 +00:00
abb9162999
Work around a gas bug. Print '-9223372036854775808' as unsigned.
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llvm-svn: 11729
2004-02-23 03:27:05 +00:00
7e90628a8a
Implement cast fp -> bool
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llvm-svn: 11728
2004-02-23 03:21:41 +00:00
d31caa438a
Add testcase for the casts that are missing in PR249
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llvm-svn: 11727
2004-02-23 03:21:09 +00:00
6590c29971
Stop passing iterators around by reference now that we have ilists!
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Implement cast Type::ULongTy -> double
llvm-svn: 11726
2004-02-23 03:10:10 +00:00
887b941fbb
Some code cleanups from Chris
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llvm-svn: 11724
2004-02-23 01:57:39 +00:00
d42c2f24ec
Fix comments in PhysRegTracker and rename isPhysRegAvail to isRegAvail to be consistent with the other two
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llvm-svn: 11723
2004-02-23 01:25:05 +00:00
378157c3d7
Add a new cmove instruction
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llvm-svn: 11722
2004-02-23 01:16:05 +00:00
4d7ad6713d
Move LiveIntervals.h up to be the first included header
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llvm-svn: 11721
2004-02-23 01:01:21 +00:00
1410859484
Pull PhysRegTracker out of RegAllocLinearScan as it can be used by other allocators as well
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llvm-svn: 11720
2004-02-23 00:53:31 +00:00
486b12b71a
Move LiveIntervals.h to lib/CodeGen since it shouldn't be exposed to other parts of the compiler
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llvm-svn: 11719
2004-02-23 00:50:15 +00:00
cdd56634b0
Only insert FP_REG_KILL instructions in MachineBasicBlocks that actually
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use FP instructions. This reduces the number of instructions inserted in
176.gcc (for example) from 58074 to 101 (it doesn't use much FP, which
is typical). This reduction speeds up the entire code generator. In the
case of 176.gcc, llc went from taking 31.38s to 24.78s. The passes that
sped up the most are the register allocator and the 2 live variable analysis
passes, which sped up 2.3, 1.3, and 1.5s respectively. The asmprinter
pass also sped up because it doesn't print the instructions in comments :)
Note that this patch is likely to expose latent bugs in machine code passes,
because now basicblock can be empty, where they were never empty before. I
cleaned out regalloclocal, but who knows about linscan :)
llvm-svn: 11717
2004-02-22 19:47:26 +00:00
19aef9e757
Another bug fix for empty MBB's
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llvm-svn: 11716
2004-02-22 19:37:31 +00:00
8358cc573d
Move MOTy::UseType enum into MachineOperand. This eliminates the
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switch statements in the constructors and simplifies the
implementation of the getUseType() member function. You will have to
specify defs using MachineOperand::Def instead of MOTy::Def though
(similarly for Use and UseAndDef).
llvm-svn: 11715
2004-02-22 19:23:26 +00:00
84b406650e
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.
llvm-svn: 11714
2004-02-22 19:08:15 +00:00
fae7564027
Reduce the number of pointless copies inserted due to constant pointer refs.
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Also, make an assertion actually fireable!
llvm-svn: 11713
2004-02-22 17:35:42 +00:00
fa3ebd6ad5
Fix bug in previous checkout: leave the iterator at the first instruction
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AFTER the GEP that was emitted. :(
llvm-svn: 11712
2004-02-22 17:05:38 +00:00
cb243ab173
Fix silly bug in implementation of getUseType(). Thanks Misha.
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llvm-svn: 11711
2004-02-22 07:24:19 +00:00
6536519f6e
Completely rewrite how getelementptr instructions are expanded. This has two
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(minor) benefits right now:
1. An extra dummy MOVrr32 is gone. This move would often be coallesced by
both allocators anyway.
2. The code now uses the gep_type_iterator to walk the gep, which should future
proof it a bit. It still assumes that array indexes are Longs though.
These don't really justify rewriting the code. The big benefit will come later
though.
llvm-svn: 11710
2004-02-22 07:04:00 +00:00
de51c65299
When folding memory operands in machine instructions be careful to
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leave register operands with the same use/def flags as the original
instruction.
llvm-svn: 11709
2004-02-22 06:54:26 +00:00
d25dfe43b9
Significantly simplify gep_type_iterator, and make its interface more general/powerful
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llvm-svn: 11708
2004-02-22 06:27:03 +00:00
494d510769
Fix a soon-to-be-missing #include
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llvm-svn: 11707
2004-02-22 06:26:17 +00:00
a9eddae213
Get all instruction definitions
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llvm-svn: 11706
2004-02-22 06:25:38 +00:00
5fc6ae2baf
Wow this is out of date. When we have _real_ code generator documentation,
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this should be folded into it.
llvm-svn: 11705
2004-02-22 05:53:54 +00:00
cb352300c9
Print basic block boundaries in machine instruction debug output.
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llvm-svn: 11704
2004-02-22 05:46:04 +00:00
132f6bb60f
Link to most recent "LLVM document"
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llvm-svn: 11703
2004-02-22 05:45:02 +00:00
8d0bacbb9e
Implement Transforms/InstCombine/cast.ll:test13, a case which occurs in a
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hot 164.gzip loop.
llvm-svn: 11702
2004-02-22 05:25:17 +00:00
9c08d09de6
Test that the instruction combiner can fold away a cast in a GEP instruction.
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This occurs in 164.gzip, as a result of it declaring arrays extern.
llvm-svn: 11701
2004-02-22 05:24:09 +00:00
87d72eb23f
The two address pass cannot handle two addr instructions where one incoming
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value is a physreg and one is a virtreg. For this reason, disable copy folding
entirely for physregs. Also, use the new isMoveInstr target hook which gives us
folding of FP moves as well.
llvm-svn: 11700
2004-02-22 04:44:58 +00:00
d890f59f19
Abstract merging of ranges away from number of slots per instruction.
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Also make it less aggressive as the current implementation breaks in
some cases.
llvm-svn: 11696
2004-02-22 04:05:13 +00:00
a376aae246
Use isNull instead of getNode() to test for existence of a node, this is cheaper.
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FIX MAJOR BUG, whereby we didn't merge null edges correctly. Correcting this
fixes poolallocation on 175.vpr, and possibly others.
llvm-svn: 11695
2004-02-22 00:53:54 +00:00
f3e2a6360c
Fix an iterator invalidation problem which was causing some nodes to not be
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correctly merged over!
llvm-svn: 11693
2004-02-21 22:28:26 +00:00
eeb69197bf
Use handy method
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llvm-svn: 11692
2004-02-21 22:27:31 +00:00
6983f46792
Update comments and add warning
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llvm-svn: 11691
2004-02-21 22:27:20 +00:00
0025f1b044
`cat' is usually in /bin, not /usr/bin, at least on our systems.
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llvm-svn: 11690
2004-02-21 21:51:41 +00:00
375e3a1d4a
When printing a stack trace, demangle it if possible. Since we are potentially
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in a signal handler, allocating memory or doing other unsafe things is bad,
which means we should do it in a different process.
llvm-svn: 11689
2004-02-21 21:06:19 +00:00
334114bdf1
Make 'fold' statistic's description the same in both allocators.
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llvm-svn: 11687
2004-02-21 18:07:33 +00:00
ab66f3d143
Instead of cloning the globals for main into the globals graph at the end of
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BU propagation, clone the globals into the GG of EACH FUNCTION that finishes
processing! The GlobalsGraph *must* include all globals and effects from
all functions in the program. Fixing this makes pool allocation work better
on 175.vpr, but it still ultimately crashes.
llvm-svn: 11686
2004-02-21 00:30:28 +00:00
6a4e39677e
There is no need to merge the globals graph into the function graphs at the
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end of the BU and CBU passes. The globals will be marked incomplete, so it
doesn't matter if they are missing some info, and merging isn't guaranteed
to bring everything in anyway!
llvm-svn: 11684
2004-02-20 23:52:15 +00:00
7b0368ee16
Add two missing returns, which caused us to be very pessimistic about the
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printf and scanf families!
llvm-svn: 11683
2004-02-20 23:27:09 +00:00
Chris Lattner