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168e4bf455
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5470 Commits

Author SHA1 Message Date
Alkis Evlogimenos
168e4bf455 Fix crash in debug output. 
llvm-svn: 11659
 2004-02-20 06:41:12 +00:00
Brian Gaeke
688940d763 Use backtrace() and include execinfo.h, if they were detected by autoconf. 
llvm-svn: 11658
 2004-02-20 06:40:59 +00:00
Alkis Evlogimenos
16744f2860 Fix instruction numbering in debug output. 
llvm-svn: 11655
 2004-02-20 06:29:51 +00:00
Alkis Evlogimenos
f32239a5c6 Too many changes in one commit: 
1. LiveIntervals now implement a 4 slot per instruction model. Load,
   Use, Def and a Store slot. This is required in order to correctly
   represent caller saved register clobbering on function calls,
   register reuse in the same instruction (def resues last use) and
   also spill code added later by the allocator. The previous
   representation (2 slots per instruction) was insufficient and as a
   result was causing subtle bugs.

2. Fixes in spill code generation. This was the major cause of
   failures in the test suite.

3. Linear scan now has core support for folding memory operands. This
   is untested and not enabled (the live interval update function does
   not attempt to fold loads/stores in instructions).

4. Lots of improvements in the debugging output of both live intervals
   and linear scan. Give it a try... it is beautiful :-)

In summary the above fixes all the issues with the recent reserved
register elimination changes and get the allocator very close to the
next big step: folding memory operands.

llvm-svn: 11654
 2004-02-20 06:15:40 +00:00
Chris Lattner
b24f30de8d It is totally unacceptable to print out (literally) millions of zeros when 
compiling 129.compress... so don't!

llvm-svn: 11649
 2004-02-20 05:49:22 +00:00
Chris Lattner
0d3df27b4c Disable the stack trace thing until we can get an autoconf test for it. This 
call breaks on sparcs

llvm-svn: 11635
 2004-02-19 21:21:23 +00:00
Chris Lattner
6deffd7154 Implement new function 
llvm-svn: 11631
 2004-02-19 20:03:14 +00:00
Alkis Evlogimenos
eed4727191 Fix RA::verifyAssignment() 
llvm-svn: 11629
 2004-02-19 19:24:17 +00:00
Chris Lattner
c37073f249 Fix problem fusing spill code into instructions: we didn't update the live 
variable information to take into account the change of instruction
address.

llvm-svn: 11628
 2004-02-19 18:34:02 +00:00
Chris Lattner
266206caed Fix an iterator invalidation problem. :( 
llvm-svn: 11627
 2004-02-19 18:32:29 +00:00
Chris Lattner
6b0030105e Add method to update livevar when an instruction moves 
llvm-svn: 11625
 2004-02-19 18:28:02 +00:00
Chris Lattner
8a9be6b652 Fix a __LONG__ term annoyance of mine: symbolic registers weren't being printed 
by operator<< on MachineInstr's, and looking up what register "24" is all of the
time was greatly annoying.

llvm-svn: 11623
 2004-02-19 16:17:08 +00:00
Chris Lattner
436ab13009 Add a MachineBasicBlock::getParent() method 
llvm-svn: 11622
 2004-02-19 16:13:54 +00:00
Alkis Evlogimenos
59c646da40 Make ToolExecutionError inherit std::exception and implement its 
interface: getMessage() is gone, use what() instead.

llvm-svn: 11621
 2004-02-19 07:39:26 +00:00
Alkis Evlogimenos
fbaf7b3944 Print stacktrace in STDERR before dying on a fatal signal. Currently 
the symbols are not demangled.

llvm-svn: 11620
 2004-02-19 07:36:35 +00:00
Alkis Evlogimenos
68f40cbfd3 Rename reloads/spills to loads/stores. 
llvm-svn: 11619
 2004-02-19 06:19:09 +00:00
Chris Lattner
2a293313ca Add support for just running the code generator 
llvm-svn: 11611
 2004-02-18 23:24:41 +00:00
Alkis Evlogimenos
310f641c9c Implement assignment correctness verification. 
llvm-svn: 11609
 2004-02-18 23:15:23 +00:00
Chris Lattner
5a22f3a7d1 indent correctly 
llvm-svn: 11601
 2004-02-18 20:58:00 +00:00
Chris Lattner
eddc6ab2e7 Don't yell. BUGPOINT should yell, not the tool runner :) 
llvm-svn: 11600
 2004-02-18 20:57:38 +00:00
Chris Lattner
a52c617fd7 If there is an error running a tool, include the error message (e.g. assertion failure) in the exception 
llvm-svn: 11597
 2004-02-18 20:38:00 +00:00
Chris Lattner
72ce97cc95 When an error occurs executing a tool, we now throw an exception instead 
of calling exit(1).

llvm-svn: 11593
 2004-02-18 20:21:57 +00:00
Chris Lattner
e672426e5d Eliminate operator[] is deprecated warnings 
llvm-svn: 11578
 2004-02-18 16:43:51 +00:00
Chris Lattner
8acab89631 Fix deprecated operator[] warnings 
llvm-svn: 11577
 2004-02-18 16:38:18 +00:00
Alkis Evlogimenos
7ec1bad952 Fix argument size for MOVSX and MOVZX instructions. 
llvm-svn: 11576
 2004-02-18 16:20:40 +00:00
Alkis Evlogimenos
c394f7803b Be more agressive when joining ranges. 
llvm-svn: 11575
 2004-02-18 04:38:37 +00:00
Alkis Evlogimenos
5c90efed55 Fix overly conservative spill interval computation. 
llvm-svn: 11574
 2004-02-18 03:35:38 +00:00
Alkis Evlogimenos
7290ef1f5c Beautify debug output. 
llvm-svn: 11573
 2004-02-18 00:35:06 +00:00
Chris Lattner
4fa2e7a67f Fix PR245: Linking weak and strong global variables is dependent on link order 
llvm-svn: 11565
 2004-02-17 21:56:04 +00:00
Chris Lattner
d9e1a49650 When we complete the bottom-up pass, make sure to merge the globals in 'main' into 
the globals graph.

llvm-svn: 11562
 2004-02-17 19:06:47 +00:00
Chris Lattner
f58d2dd6cf Add support for GlobalAddress's for alkis 
llvm-svn: 11560
 2004-02-17 18:23:55 +00:00
Alkis Evlogimenos
c6f0651e5c These store to memory too. 
llvm-svn: 11558
 2004-02-17 17:53:48 +00:00
Chris Lattner
ea22a3de13 Remove the -disable-kill option. The register allocator is buggy with it, 
and it was only for debugging in the first place.

llvm-svn: 11557
 2004-02-17 17:49:10 +00:00
Chris Lattner
88271db3bc These store to memory, not read from it. 
llvm-svn: 11556
 2004-02-17 17:46:50 +00:00
Alkis Evlogimenos
0528c59353 Instructiosn with 1 memory operand have 4 operands in our 
representation.. duh!

llvm-svn: 11554
 2004-02-17 15:58:13 +00:00
Alkis Evlogimenos
b1a61b72f2 Align case statements. 
llvm-svn: 11552
 2004-02-17 15:50:41 +00:00
Alkis Evlogimenos
b815fd46ec Add TEST and XCHG memory operand support. 
llvm-svn: 11550
 2004-02-17 15:48:42 +00:00
Alkis Evlogimenos
32a5b0fd6c Add OR and XOR memory operand support. 
llvm-svn: 11549
 2004-02-17 15:33:14 +00:00
Alkis Evlogimenos
1e4b3b3c9b Peephole optimize SUBmi{16,32} into SUBmi{16,32}b when immediate is 8 
bits wide.

llvm-svn: 11548
 2004-02-17 15:14:29 +00:00
Alkis Evlogimenos
4f22bb4d4b ADDmi{16,32} should be in the next case statement. 
llvm-svn: 11547
 2004-02-17 15:10:11 +00:00
Alkis Evlogimenos
135c4faa55 Add memory operand folding support for MUL, DIV, IDIV, NEG, NOT, 
MOVSX, and MOVZX.

llvm-svn: 11546
 2004-02-17 09:14:23 +00:00
Alkis Evlogimenos
e7bbd1c2fb Add memory operand folding for CMP{rm,mr,mi}{8,16,32}, INCm{8,16,32} 
and DECm{8,16,32} instructions.

llvm-svn: 11545
 2004-02-17 08:49:20 +00:00
Alkis Evlogimenos
d7e3cc8d65 Add CMP{rm,mr,mi}{8,16,32}, INCm{8,16,32} and DECm{8,16,32} instructions. 
llvm-svn: 11544
 2004-02-17 08:49:00 +00:00
Alkis Evlogimenos
638db7b5aa Add SUB{rm,mr,mi}{8,16,32} instructions. 
llvm-svn: 11543
 2004-02-17 08:17:40 +00:00
Chris Lattner
a4e0020e54 Add support to the local allocator for fusing spill code into the instructions 
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.

llvm-svn: 11542
 2004-02-17 08:09:40 +00:00
Alkis Evlogimenos
5aa39e1583 Add support for folding memory operands for ADC, SBB and SUB instructions. 
llvm-svn: 11541
 2004-02-17 08:08:51 +00:00
Alkis Evlogimenos
28691e063b Add support for ADC{rm.mr}32 and SBB{rm,mr}32. 
llvm-svn: 11540
 2004-02-17 08:06:31 +00:00
Chris Lattner
eb1428d581 Add a (hidden) option to print instructions that fail to fuse. It's looking 
like compares and test's would be the next huge win...

llvm-svn: 11539
 2004-02-17 08:03:47 +00:00
Alkis Evlogimenos
19248dd757 Add support for folding memory operands in MOVri{8,16,32} instructions. 
llvm-svn: 11538
 2004-02-17 07:47:20 +00:00
Chris Lattner
c4ea4d12bf Expand the repertoire of the forms we can print and encode. 
llvm-svn: 11537
 2004-02-17 07:40:44 +00:00