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3100 Commits

Author SHA1 Message Date
Chris Lattner
908036942c Simplify some code, add the correct pred checks 
llvm-svn: 22613
 2005-08-03 00:38:27 +00:00
Chris Lattner
982b75c061 Refactor code out of PropagatePredecessorsForPHIs, turning it into a pure function with no side-effects 
llvm-svn: 22612
 2005-08-03 00:29:26 +00:00
Chris Lattner
1f047fd513 use splice instead of remove/insert to avoid some symtab operations 
llvm-svn: 22611
 2005-08-03 00:23:42 +00:00
Chris Lattner
76dc204488 move two functions up in the file, use SafeToMergeTerminators to eliminate 
some duplicated code

llvm-svn: 22610
 2005-08-03 00:19:45 +00:00
Chris Lattner
733d6704ce Rip some code out of the main SimplifyCFG function into a subfunction and 
call it from the only place it is live.  No functionality changes.

llvm-svn: 22609
 2005-08-03 00:11:16 +00:00
Chris Lattner
ac594de8dc Disable this patch: 
http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20050801/027345.html

This breaks real programs and only fixes an obscure regression testcase.  A
real fix is in development.

llvm-svn: 22606
 2005-08-02 23:31:38 +00:00
Chris Lattner
eee90f7eb4 Change a place to use an arbitrary value instead of null, when possible 
llvm-svn: 22605
 2005-08-02 23:29:23 +00:00
Chris Lattner
22d00a8e90 Update to use the new MathExtras.h support for log2 computation. 
Patch contributed by Jim Laskey!

llvm-svn: 22592
 2005-08-02 19:16:58 +00:00
Chris Lattner
351b891cbc Like the comment says, do not insert cast instructions before phi nodes 
llvm-svn: 22586
 2005-08-02 03:31:14 +00:00
Chris Lattner
4fd3e16cbd This code was very close, but not quite right. It did not take into 
consideration the case where a reference in an unreachable block could
occur.  This fixes Transforms/SimplifyCFG/2005-08-01-PHIUpdateFail.ll,
something I ran into while bugpoint'ing another pass.

llvm-svn: 22584
 2005-08-02 03:24:05 +00:00
Chris Lattner
75a44e154e add a comment, make a check more lenient 
llvm-svn: 22581
 2005-08-02 02:52:02 +00:00
Chris Lattner
dcce49e006 Simplify for loop, clear a per-loop map after processing each loop 
llvm-svn: 22580
 2005-08-02 02:44:31 +00:00
Chris Lattner
9ef1294210 Add a comment 
Make LSR ignore GEP's that have loop variant base values, as we currently
cannot codegen them

llvm-svn: 22576
 2005-08-02 01:32:29 +00:00
Chris Lattner
564900e5e5 Fix an iterator invalidation problem 
llvm-svn: 22575
 2005-08-02 00:41:11 +00:00
Chris Lattner
e17c5d0e59 ConstantInt::get only works for arguments < 128. 
SimplifyLibCalls probably has to be audited to make sure it does not make
this mistake elsewhere.  Also, if this code knows that the type will be
unsigned, obviously one arm of this is dead.

Reid, can you take a look into this further?

llvm-svn: 22566
 2005-08-01 16:52:50 +00:00
Jeff Cohen
546fd5944e Keep tabs and trailing spaces out. 
llvm-svn: 22565
 2005-07-30 18:33:25 +00:00
Jeff Cohen
c500991055 Fix VC++ build problems. 
llvm-svn: 22564
 2005-07-30 18:22:27 +00:00
Nate Begeman
17a0e2afea Ack, typo 
llvm-svn: 22560
 2005-07-30 00:21:31 +00:00
Nate Begeman
e68bcd1946 Commit a new LoopStrengthReduce pass that can use scalar evolutions and 
target data to decide which loop induction variables to strength reduce
and how to do so.  This work is mostly by Chris Lattner, with tweaks by
me to get it working on some of MultiSource.

llvm-svn: 22558
 2005-07-30 00:15:07 +00:00
Nate Begeman
2bca4d9b7b Break SCEVExpander out of IndVarSimplify into its own .h/.cpp file so that 
other passes may use it.

llvm-svn: 22557
 2005-07-30 00:12:19 +00:00
Jeff Cohen
5f4ef3c5a8 Eliminate all remaining tabs and trailing spaces. 
llvm-svn: 22523
 2005-07-27 06:12:32 +00:00
Chris Lattner
31d0ac2414 ConvertibleToGEP always returns 0, remove some old crufty code which 
is actually dead because of this!

llvm-svn: 22515
 2005-07-26 16:38:28 +00:00
Chris Lattner
18aa4d8196 Do not let MaskedValueIsZero consider undef to be zero, for reasons 
explained in the comment.

This fixes UnitTests/2003-09-18-BitFieldTest on darwin

llvm-svn: 22483
 2005-07-20 18:49:28 +00:00
Chris Lattner
247aef884c When transforming &A[i] < &A[j] -> i < j, make sure to perform the comparison 
as a signed compare.  This patch may fix PR597, but is correct in any case.

llvm-svn: 22465
 2005-07-18 23:07:33 +00:00
Chris Lattner
4ed40f7c6f Fix a problem that instcombine would hit when dealing with unreachable code. 
Because the instcombine has to scan the entire function when it starts up
to begin with, we might as well do it in DFO so we can nuke unreachable code.

This fixes: Transforms/InstCombine/2005-07-07-DeadPHILoop.ll

llvm-svn: 22348
 2005-07-07 20:40:38 +00:00
Chris Lattner
937c71f2b3 Fix PR590 and Transforms/Mem2Reg/2005-06-30-ReadBeforeWrite.ll. 
The optimization for locally used allocas was not safe for allocas that
were read before they were written.  This change disables that optimization
in that case.

llvm-svn: 22318
 2005-06-30 07:29:44 +00:00
John Criswell
810b4f8d55 Doh! Forgot to LLVMify the style. 
llvm-svn: 22312
 2005-06-29 15:57:50 +00:00
John Criswell
4642afdcc1 Basic fix for PR#591; don't convert an fprintf() to an fwrite() if there 
is a mismatch in their character type pointers (i.e. fprintf() prints an
array of ubytes while fwrite() takes an array of sbytes).
We can probably do better than this (such as casting the ubyte to an
sbyte).

llvm-svn: 22310
 2005-06-29 15:03:18 +00:00
Chris Lattner
9610c6f287 add a debug type 
llvm-svn: 22277
 2005-06-24 16:00:46 +00:00
Andrew Lenharth
cf52eb2b99 prevent va_arg from being hoisted from a loop 
llvm-svn: 22265
 2005-06-20 13:36:33 +00:00
Andrew Lenharth
d4b103107e prevent DCE of vaarg intrinsics. This should take care of most regressions 
llvm-svn: 22263
 2005-06-19 14:41:20 +00:00
Andrew Lenharth
9144ec4764 core changes for varargs 
llvm-svn: 22254
 2005-06-18 18:34:52 +00:00
Reid Spencer
a7828baa3c Fix a problem with the strcmp optimization checking the wrong string and 
not casting to the correct type.

llvm-svn: 22250
 2005-06-18 17:46:28 +00:00
Reid Spencer
4fdd96c4e0 Clean up some uninitialized variables and missing return statements that 
GCC 4.0.0 compiler (sometimes incorrectly) warns about under release build.

llvm-svn: 22249
 2005-06-18 17:37:34 +00:00
Chris Lattner
2ceb6ee576 This is not true: (X != 13 | X < 15) -> X < 15 
It is actually always true.  This fixes PR586 and
Transforms/InstCombine/2005-06-16-SetCCOrSetCCMiscompile.ll

llvm-svn: 22236
 2005-06-17 03:59:17 +00:00
Chris Lattner
73bcba5f61 Don't crash when dealing with INTMIN. This fixes PR585 and 
Transforms/InstCombine/2005-06-16-RangeCrash.ll

llvm-svn: 22234
 2005-06-17 02:05:55 +00:00
Chris Lattner
5e735294bf Don't crash on: X = phi (X, X). 
This fixes PR584 and Transforms/SimplifyCFG/2005-06-16-PHICrash.ll

llvm-svn: 22232
 2005-06-17 01:45:53 +00:00
Chris Lattner
c53cb9d3ff avoid constructing out of range shift amounts. 
llvm-svn: 22230
 2005-06-17 01:29:28 +00:00
Chris Lattner
89dc4f16f5 Fix PR583 and testcase Transforms/InstCombine/2005-06-15-DivSelectCrash.ll 
llvm-svn: 22227
 2005-06-16 04:55:52 +00:00
Chris Lattner
252a845e30 Fix PR571, removing code that does just the WRONG thing :) 
llvm-svn: 22225
 2005-06-16 03:00:08 +00:00
Chris Lattner
104002bee3 Fix a bug in my previous patch. Do not get the shift amount type (which 
is always ubyte, get the type being shifted).  This unbreaks espresso

llvm-svn: 22224
 2005-06-16 01:52:07 +00:00
Chris Lattner
d48b127aea Fix PR575, patch provided by John Mellor-Crummey. Thanks! 
llvm-svn: 22223
 2005-06-15 22:49:30 +00:00
Chris Lattner
df81539278 Fix PR582. The rewriter can move casts around, which invalidated the 
BB iterator.  This fixes Transforms/IndVarsSimplify/2005-06-15-InstMoveCrash.ll

llvm-svn: 22221
 2005-06-15 21:29:31 +00:00
Chris Lattner
50bdfcb045 Do not promote globals only used by main to locals if there are constantexprs 
or other uses hanging off of them.

llvm-svn: 22219
 2005-06-15 21:11:48 +00:00
Chris Lattner
19b57f55aa Fix PR577 and testcase InstCombine/2005-06-15-ShiftSetCCCrash.ll. 
Do not perform undefined out of range shifts.

llvm-svn: 22217
 2005-06-15 20:53:31 +00:00
Reid Spencer
a299d6f701 Put the hack back in that removes features, causes regressions to fail, but 
allows test programs to succeed. Actual fix for this is forthcoming.

llvm-svn: 22213
 2005-06-15 18:25:30 +00:00
Reid Spencer
6d231e55fa Unbreak several InstCombine regression checks introduced by a hack to 
fix the bzip2 test. A better hack is needed.

llvm-svn: 22209
 2005-06-13 06:41:26 +00:00
Chris Lattner
1609a541cd Fix a 64-bit problem, passing (int)0 through ... instead of (void*)0 
llvm-svn: 22206
 2005-06-09 03:32:54 +00:00
Chris Lattner
fbc45f10d0 Fix a problem on 64-bit targets where we passed (int)0 through ... instead of 
(void*)0.

llvm-svn: 22205
 2005-06-09 02:59:00 +00:00
Andrew Lenharth
ffe65458e7 hack to fix bzip2 (bug 571) 
llvm-svn: 22192
 2005-06-04 12:43:56 +00:00