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Author SHA1 Message Date
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
9ad19f6f8b new method 
llvm-svn: 30048
 2006-09-02 05:26:01 +00:00
Evan Cheng
cdf49f8b10 Another "cyclic DAG" test case. 
llvm-svn: 30043
 2006-09-01 23:50:17 +00:00
Evan Cheng
69ef4ae2a1 Oops. Bad typo. Without the check of N1.hasOneUse() bad things can happen. 
Suppose the TokenFactor can reach the Op:

       [Load chain]
           ^
           |
         [Load]
         ^    ^
         |    |
        /      \-
       /         |
      /          [Op]
     /          ^ ^
     |        ..  |
     |       /    |
   [TokenFactor]  |
       ^          |
       |          |
        \        /
         \      /
         [Store]

If we move the Load below the TokenFactor, we would have created a cycle in
the DAG.

llvm-svn: 30040
 2006-09-01 22:52:28 +00:00
Chris Lattner
fa87f12b85 Use a couple of multiclass patterns to factor some integer ops. 
llvm-svn: 30039
 2006-09-01 22:28:02 +00:00
Chris Lattner
04b7417f40 remove a bunch of comments 
llvm-svn: 30038
 2006-09-01 22:16:22 +00:00
Chris Lattner
997e7e3d45 Make sure to clear CurDefmPrefix = 0, otherwise stuff after a defm won't 
parse right.  This fixes TableGen/MultiClass.td

llvm-svn: 30037
 2006-09-01 22:07:27 +00:00
Chris Lattner
dc8b45e90e Make this harder 
llvm-svn: 30036
 2006-09-01 22:07:00 +00:00
Chris Lattner
128ad4e442 Fix a typo Jim pointed out, thanks! 
llvm-svn: 30035
 2006-09-01 22:01:36 +00:00
Chris Lattner
4c597bb380 fix an assertion with multidefs. Def inside of multiclasses don't need to 
be complete.

llvm-svn: 30034
 2006-09-01 21:59:03 +00:00
Bill Wendling
3233cae4be Fixed formatting problem. 
llvm-svn: 30033
 2006-09-01 21:47:10 +00:00
Chris Lattner
a7a9ca8910 document !strconcat 
llvm-svn: 30032
 2006-09-01 21:46:01 +00:00
Bill Wendling
23ab3ad3eb Added documentation Fernando Magno Quintao Pereira wrote for the register 
allocator. (First draft)

llvm-svn: 30031
 2006-09-01 21:46:00 +00:00
Chris Lattner
0ef41a8fdc Document multiclasses and defm's 
llvm-svn: 30030
 2006-09-01 21:44:18 +00:00
Chris Lattner
67e2187a04 regenerate 
llvm-svn: 30029
 2006-09-01 21:14:42 +00:00
Chris Lattner
1e5cf5e60f simple multiclass example 
llvm-svn: 30028
 2006-09-01 21:14:37 +00:00
Chris Lattner
948354e18e Add often-requested support for defining "multiclasses" which can be instantiated. 
This allows you to define multiple definitions with one line, encouraging
more .td file factoring.

llvm-svn: 30027
 2006-09-01 21:13:49 +00:00
Anton Korobeynikov
1c7d8613c4 - Fixed broken Win32 build 
- Removed warning about clobbered parameter in Bytecode/Reader

llvm-svn: 30026
 2006-09-01 20:35:17 +00:00
Evan Cheng
4bb35b7730 Remove extra spaces. 
llvm-svn: 30025
 2006-09-01 18:45:22 +00:00
Evan Cheng
86888bd45a Last check-in was a mistake... 
I've been told apple gcc version number is not guaranteed to increase
monotonically. Change the preprocess condition to make it less risky.

The configuration change is done during the middle 10.4 life cycle so we have
to check __APPLE_CC. For future OS X release, we should be able to assume
-fenable-cxa-atexit is the default.

llvm-svn: 30024
 2006-09-01 18:42:59 +00:00
Evan Cheng
22679fcdd8 *** empty log message *** 
llvm-svn: 30023
 2006-09-01 18:40:46 +00:00
Evan Cheng
464ef8dc53 Allow legalizer to expand ISD::MUL using only MULHS in the rare case that is 
possible and the target only supports MULHS.

llvm-svn: 30022
 2006-09-01 18:17:58 +00:00
Jim Laskey
2f8c98b9b1 Corrections. 
llvm-svn: 30021
 2006-09-01 12:55:05 +00:00
Evan Cheng
017334de42 Better comments. 
llvm-svn: 30017
 2006-09-01 07:09:56 +00:00
Evan Cheng
0c6e5c95dc Yikes. This requires checking apple gcc version. 
llvm-svn: 30016
 2006-09-01 07:00:46 +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
89a7eadf22 remove some particularly expensive assertions 
llvm-svn: 30014
 2006-09-01 06:57:35 +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
7453a7d197 add a simple reserve method. 
llvm-svn: 30011
 2006-09-01 06:08:16 +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
Nick Lewycky
ebb3b930fd Don't confuse canonicalize and lookup. Fixes predsimplify.reg4.ll. Also 
corrects missing optimization opportunity removing cases from a switch.

llvm-svn: 30009
 2006-09-01 03:26:35 +00:00
Evan Cheng
b2933f3f52 DAG combiner fix for rotates. Previously the outer-most condition checks 
for ROTL availability. This prevents it from forming ROTR for targets that
has ROTR only.

llvm-svn: 29997
 2006-08-31 07:41:12 +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
f0e85f8600 Add a note about C++ -> C with libstdc++ 
llvm-svn: 29993
 2006-08-31 04:26:31 +00:00
Nick Lewycky
56d79475b7 This program crashes the PredicateSimplifier. Not marked XFAIL because 
the PredicateSimplifier is skipped in make check anyways.

llvm-svn: 29992
 2006-08-31 03:13:05 +00:00
Nick Lewycky
e31a5a1b20 Properties where both Values weren't in the union (as being equal to 
another Value) weren't being found by findProperties.

This fixes predsimplify.ll test6, a missed optimization opportunity.

llvm-svn: 29991
 2006-08-31 00:39:16 +00:00
Chris Lattner
51ea6dd990 Bugfix for recent coallescer crash 
llvm-svn: 29990
 2006-08-30 23:03:35 +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
45063c4be4 Restore source-level compatibility with clients of these functions. 
llvm-svn: 29978
 2006-08-30 20:47:48 +00:00
Chris Lattner
3530cfb3c3 Guess what happens when asserts are disabled. :( 
Also, the assert could never fire due to || instead of &&.

llvm-svn: 29977
 2006-08-30 20:37:06 +00:00
Chris Lattner
c7fb7a05bf fix 80 column issue 
llvm-svn: 29972
 2006-08-30 05:56:52 +00:00
Chris Lattner
e84b1b8352 Instantiate Statistic<> in one place, not in every .o file that uses it. 
llvm-svn: 29971
 2006-08-30 04:17:00 +00:00
Nick Lewycky
4a44c62fab Move to using the EquivalenceClass ADT. Removes SynSets. 
If a branch's condition has become a ConstantBool, simplify it immediately.
Removing the edge saves work and exposes up more optimization opportunities
in the pass.
Add support for SelectInst.

llvm-svn: 29970
 2006-08-30 02:46:48 +00:00
Chris Lattner
15bbdd8061 Code cleanups, no functionality change. 
llvm-svn: 29969
 2006-08-29 23:38:20 +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
e3875d952f new testcase for pr687 
llvm-svn: 29967
 2006-08-29 23:09:59 +00:00
Devang Patel
a5bb9b49d3 Do not rely on std::sort and std::erase to get list of unique 
exit blocks. The output is dependent on addresses of basic block.

Add and use Loop::getUniqueExitBlocks.

llvm-svn: 29966
 2006-08-29 22:29:16 +00:00