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95 Commits

Author SHA1 Message Date
Jeff Cohen
f99052befb Unbreak VC++ build. 
llvm-svn: 32113
 2006-12-02 02:22:01 +00:00
Evan Cheng
bf13611e84 Match TargetInstrInfo changes. 
llvm-svn: 32098
 2006-12-01 21:52:58 +00:00
Bill Wendling
a29e6c5ec9 Converted to using llvm streams instead of <iostream>s 
llvm-svn: 31992
 2006-11-29 00:39:47 +00:00
Bill Wendling
bcd11344e9 Don't recompute getNumOperands for each iteration. 
llvm-svn: 31783
 2006-11-16 07:35:18 +00:00
Bill Wendling
985d7e09ec Added a new method "CreateNewLiveInterval" which, given a list of 
LiveRanges, creates a new LiveInterval from them. The LiveRanges should
have existed already in another LiveInterval, but removed.

llvm-svn: 31780
 2006-11-16 02:41:50 +00:00
Evan Cheng
7b19d271c4 A register def can be partially dead when the whole register has use(s) but a subreg does not. 
llvm-svn: 31760
 2006-11-15 20:54:11 +00:00
Evan Cheng
013597778d Add implicit def / use operands to MachineInstr. 
llvm-svn: 31633
 2006-11-10 08:43:01 +00:00
Jim Laskey
28fec74f1b Remove redundant <cmath>. 
llvm-svn: 31561
 2006-11-08 19:16:44 +00:00
Chris Lattner
3e2e03ef34 Enable improved spilling costs by default. This speeds up viterbi on x86 
by 40%, FreeBench/fourinarow by 20%, and many other programs 10-25%.

On PPC, this speeds up fourinarow by 18%, and probably other things as well.

llvm-svn: 31504
 2006-11-07 18:04:58 +00:00
Jim Laskey
4b1aff4aec Use correct value for float HUGH_VAL. 
llvm-svn: 31500
 2006-11-07 12:25:45 +00:00
Chris Lattner
f966846d10 Add a new llcbeta option. This speeds up viterbi from 12.34 to 8.76s on 
X86.  If happy, I'll enable this by default.

llvm-svn: 31493
 2006-11-07 07:18:40 +00:00
Evan Cheng
79570c731a Proper check for two-addressness. 
llvm-svn: 31408
 2006-11-03 03:04:46 +00:00
Reid Spencer
4bafa71dc1 For PR786: 
Turn on -Wunused and -Wno-unused-parameter. Clean up most of the resulting
fall out by removing unused variables. Remaining warnings have to do with
unused functions (I didn't want to delete code without review) and unused
variables in generated code. Maintainers should clean up the remaining
issues when they see them. All changes pass DejaGnu tests and Olden.

llvm-svn: 31380
 2006-11-02 20:25:50 +00:00
Chris Lattner
9306fac571 Keep track of the start of MBB's in a separate map from instructions. This 
is faster and is needed for future improvements.

llvm-svn: 30383
 2006-09-15 03:57:23 +00:00
Chris Lattner
59a4d8dfcd Fix a long-standing wart in the code generator: two-address instruction lowering 
actually *removes* one of the operands, instead of just assigning both operands
the same register.  This make reasoning about instructions unnecessarily complex,
because you need to know if you are before or after register allocation to match
up operand #'s with the target description file.

Changing this also gets rid of a bunch of hacky code in various places.

This patch also includes changes to fold loads into cmp/test instructions in
the X86 backend, along with a significant simplification to the X86 spill
folding code.

llvm-svn: 30108
 2006-09-05 02:12:02 +00:00
Chris Lattner
b26f7cd68a Correct fix for a crasher on functions with live in values 
llvm-svn: 30099
 2006-09-04 18:27:40 +00:00
Chris Lattner
ae9537991c Hack around a regression I introduced yesterday 
llvm-svn: 30098
 2006-09-04 18:20:15 +00:00
Chris Lattner
b590a41f7b Avoid beating on the mi2i map when we know the answer already. 
llvm-svn: 30066
 2006-09-03 08:07:11 +00:00
Chris Lattner
4890186e93 minor speedup 
llvm-svn: 30065
 2006-09-03 07:53:50 +00:00
Chris Lattner
dfda549a00 Iteration is required for some cases, even if they don't occur in crafty. 
Restore it, which re-fixes X86/2006-08-21-ExtraMovInst.ll

llvm-svn: 30050
 2006-09-02 05:32:53 +00:00
Chris Lattner
382e699e59 When joining two intervals where the RHS is really simple, use a light-weight 
method for joining the live ranges instead of the fully-general one.

llvm-svn: 30049
 2006-09-02 05:26:59 +00:00
Chris Lattner
fc38415ddc Pull some code out of a hot recursive function because the common case doesn't 
need recursion.

llvm-svn: 30015
 2006-09-01 07:00:23 +00:00
Chris Lattner
2aef97494c Reserve space in the ValueNumberInfo vector. This speeds up live interval 
analysis 16% on crafty.

Wrap long lines.

llvm-svn: 30012
 2006-09-01 06:10:18 +00:00
Chris Lattner
0c120af606 Iterative coallescing doesn't buy us anything (we get identical results on 
crafty with and without it).  Removing it speeds up live intervals 6%.

llvm-svn: 30010
 2006-09-01 04:02:42 +00:00
Chris Lattner
fbb467f738 Add a special case that speeds up coallescing a bit, but not enough. 
llvm-svn: 29996
 2006-08-31 06:48:26 +00:00
Chris Lattner
1020604f2c Delete copies as they are coallesced instead of waiting until the end. 
llvm-svn: 29995
 2006-08-31 05:58:59 +00:00
Chris Lattner
998dd9b42e avoid calling the virtual isMoveInstr method endlessly by caching its results. 
llvm-svn: 29994
 2006-08-31 05:54:43 +00:00
Chris Lattner
44b10a80c3 Fix a compiler crash bootstrapping llvm-gcc. 
llvm-svn: 29989
 2006-08-30 23:02:29 +00:00
Chris Lattner
3a4d512930 Teach the coallescer to coallesce live intervals joined by an arbitrary 
number of copies, potentially defining live ranges that appear to have
differing value numbers that become identical when coallsced.  Among other
things, this fixes CodeGen/X86/shift-coalesce.ll and PR687.

llvm-svn: 29968
 2006-08-29 23:18:15 +00:00
Chris Lattner
f530302eda Eliminate RegisterAnalysis. RegisterPass now does all that is necessary. 
llvm-svn: 29921
 2006-08-27 22:30:17 +00:00
Chris Lattner
e74c843893 typo fix 
llvm-svn: 29910
 2006-08-27 12:47:48 +00:00
Chris Lattner
86106b8ef4 Simplifications to liveinterval analysis, no functionality change. 
llvm-svn: 29896
 2006-08-26 01:28:16 +00:00
Chris Lattner
ec9c7fa089 Completely change the way that joining with physregs is implemented. This 
paves the way for future changes, increases coallescing opportunities (in
theory, not witnessed in practice), and eliminates the really expensive
LiveIntervals::overlapsAliases method.

llvm-svn: 29890
 2006-08-25 23:41:24 +00:00
Chris Lattner
28645a15bd Take advantage of the recent improvements to the liveintervals set (tracking 
instructions which define each value#) to simplify and improve the coallescer.
In particular, this patch:

1. Implements iterative coallescing.
2. Reverts an unsafe hack from handlePhysRegDef, superceeding it with a
   better solution.
3. Implements PR865, "coallescing" away the second copy in code like:

   A = B
   ...
   B = A

This also includes changes to symbolically print registers in intervals
when possible.

llvm-svn: 29862
 2006-08-24 22:43:55 +00:00
Chris Lattner
410c49afd3 Improve the LiveInterval class to keep track of which machine instruction 
defines each value# tracked by the interval.  This will be used to improve
coallescing.

llvm-svn: 29830
 2006-08-22 18:19:46 +00:00
Chris Lattner
0ef1992bd1 Print physreg names symbolically in dumps 
llvm-svn: 29805
 2006-08-21 23:03:54 +00:00
Chris Lattner
4a70fbdbdd Print debug info as: 
*** Register mapping ***
  reg 1024 -> %reg1028
  reg 1026 -> EAX
  reg 1027 -> %reg1028

instead of:

*** Register mapping ***
  reg 1024 -> reg 1028
  reg 1026 -> reg 15
  reg 1027 -> reg 1028

llvm-svn: 29803
 2006-08-21 22:56:29 +00:00
Jim Laskey
085a8477a7 Eliminate data relocations by using NULL instead of global empty list. 
llvm-svn: 29250
 2006-07-21 21:15:20 +00:00
Andrew Lenharth
c1074954fb Reduce number of exported symbols 
llvm-svn: 29220
 2006-07-20 17:28:38 +00:00
Chris Lattner
f604017e47 Patches to make the LLVM sources more -pedantic clean. Patch provided 
by Anton Korobeynikov!  This is a step towards closing PR786.

llvm-svn: 28447
 2006-05-24 17:04:05 +00:00
Evan Cheng
f3d7bb7a9e Backing out fix for PR770. Need to re-apply it after live range splitting is possible 
llvm-svn: 28236
 2006-05-12 06:06:34 +00:00
Evan Cheng
7028ff2e25 Set weight of zero length intervals to infinite to prevent them from being 
spilled.

llvm-svn: 28220
 2006-05-11 07:29:24 +00:00
Evan Cheng
aad3fe008e PR 770 - permit coallescing of registers in subset register classes. 
llvm-svn: 28197
 2006-05-09 06:37:48 +00:00
Chris Lattner
685568510a Move some methods out of MachineInstr into MachineOperand 
llvm-svn: 28102
 2006-05-04 17:52:23 +00:00
Chris Lattner
befcd1e76d Remove previous patch, which wasn't quite right. 
llvm-svn: 28039
 2006-05-01 21:16:03 +00:00
Evan Cheng
02e72f8f55 Local spiller kills a store if the folded restore is turned into a copy. 
But this is incorrect if the spilled value live range extends beyond the
current BB.
It is currently controlled by a temporary option -spiller-check-liveout.

llvm-svn: 28024
 2006-04-30 08:41:47 +00:00
Chris Lattner
aafc339b4e Add explicit #includes of <iostream> 
llvm-svn: 25515
 2006-01-22 23:41:00 +00:00
Chris Lattner
d455e0ce54 Minor cleanup, no functionality change for current targets 
llvm-svn: 25173
 2006-01-10 05:41:59 +00:00
Chris Lattner
ded5041b23 Change a variable from being an iterator to a raw MachineInstr*, to make 
GDB use tolerable

llvm-svn: 25064
 2006-01-03 07:41:37 +00:00
Chris Lattner
daf6a48dae Fix some spello's pointed out by Gabor Greif 
llvm-svn: 24019
 2005-10-26 18:41:41 +00:00