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11427 Commits

Author SHA1 Message Date
Chris Lattner
f9c0fd7488 Tighten up a check for folding away loads from (newly constant) globals. This 
fixes a crash on Transforms/GlobalOpt/2007-11-09-GEP-GEP-Crash.ll and 
rdar://5585488.

llvm-svn: 43949
 2007-11-09 17:33:02 +00:00
Andrew Lenharth
19ca5c7021 Better check 
llvm-svn: 43897
 2007-11-08 18:45:15 +00:00
Andrew Lenharth
8cf11aa330 Fix PR1780 
llvm-svn: 43893
 2007-11-08 17:39:28 +00:00
Chris Lattner
d8515f8e80 Implement PR1777 by detecting dependent phis that 
all compute the same value.

llvm-svn: 43777
 2007-11-06 21:52:06 +00:00
Dan Gohman
4decbc5002 Fix an abort in instcombine when folding creates a vector rem instruction. 
llvm-svn: 43743
 2007-11-05 23:16:33 +00:00
Devang Patel
b98d2050a2 If a value is incoming from outside the loop then the value does not need remapping and the value is never tracked through LastValueMap. 
llvm-svn: 43728
 2007-11-05 19:32:30 +00:00
Duncan Sands
399d97987b Change uses of getTypeSize to getABITypeSize, getTypeStoreSize 
or getTypeSizeInBits as appropriate in ScalarReplAggregates.
The right change to make was not always obvious, so it would
be good to have an sroa guru review this.  While there I noticed
some bugs, and fixed them: (1) arrays of x86 long double have
holes due to alignment padding, but this wasn't being spotted
by HasStructPadding (renamed to HasPadding).  The same goes
for arrays of oddly sized ints.  Vectors also suffer from this,
in fact the problem for vectors is much worse because basic
vector assumptions seem to be broken by vectors of type with
alignment padding.   I didn't try to fix any of these vector
problems.  (2) The code for extracting smaller integers from
larger ones (in the "int union" case) was wrong on big-endian
machines for integers with size not a multiple of 8, like i1.
Probably this is impossible to hit via llvm-gcc, but I fixed
it anyway while there and added a testcase.  I also got rid of
some trailing whitespace and changed a function name which
had an obvious typo in it.

llvm-svn: 43672
 2007-11-04 14:43:57 +00:00
Owen Anderson
2ed651ace7 Fix test/Transforms/DeadStoreElimination/PartialStore.ll, which had been 
silently failing because of an incorrect run line for some time.

llvm-svn: 43605
 2007-11-01 05:29:16 +00:00
Chris Lattner
6ab19ed78d Fix InstCombine/2007-10-31-StringCrash.ll by removing an obvious 
(in hindsight) infinite recursion.  Simplify the code.

llvm-svn: 43597
 2007-11-01 02:30:35 +00:00
Chris Lattner
74709473ed Fix InstCombine/2007-10-31-RangeCrash.ll 
llvm-svn: 43596
 2007-11-01 02:18:41 +00:00
Dan Gohman
9f39660c20 Add support for folding binary operators with vector zero operands. 
llvm-svn: 43510
 2007-10-30 19:00:49 +00:00
Chris Lattner
00860d7574 update testcase 
llvm-svn: 43452
 2007-10-29 17:06:35 +00:00
Chris Lattner
c541c3ee15 Model stacksave and stackrestore as both writing memory, since we 
don't model their dependences on allocas correctly.  This fixes
PR1745.

llvm-svn: 43442
 2007-10-29 05:47:52 +00:00
Chris Lattner
9a641510bd Fix PR1749 and InstCombine/2007-10-28-EmptyField.ll by handling 
zero-length fields better.

llvm-svn: 43427
 2007-10-29 02:40:02 +00:00
Chris Lattner
4a15e04aee Fix PR1752 and LoopSimplify/2007-10-28-InvokeCrash.ll: terminators 
can have uses too.  Wouldn't it be nice if invoke didn't exist? :)

llvm-svn: 43426
 2007-10-29 02:30:37 +00:00
Chris Lattner
c62877e9da Implement a couple of foldings for ordered and unordered comparisons, 
implementing cases related to PR1738.

llvm-svn: 43289
 2007-10-24 05:38:08 +00:00
Bill Wendling
ac5c93040f Don't branch fold inline asm statements. 
llvm-svn: 43191
 2007-10-19 21:09:55 +00:00
Devang Patel
c0ced49a14 This test now passes. 
llvm-svn: 43183
 2007-10-19 17:11:01 +00:00
Chris Lattner
9715d9fb59 Fix PR1735 and Transforms/DeadArgElim/2007-10-18-VarargsReturn.ll by 
fixing some obviously broken code :(

llvm-svn: 43141
 2007-10-18 18:49:29 +00:00
Devang Patel
9497767458 XFAIL for now. 
llvm-svn: 43111
 2007-10-18 00:48:43 +00:00
Devang Patel
b3dac3f5d9 Do not raise free() call that is called through invoke instruction. 
llvm-svn: 43083
 2007-10-17 20:12:58 +00:00
Devang Patel
91ff13edcc Apply "Instead of loading small c string constant, use integer constant directly" transformation while processing load instruction. 
llvm-svn: 43070
 2007-10-17 07:24:40 +00:00
Chris Lattner
ad618f66e6 Fix a bug in my patch last night that broke InstCombine/2007-10-12-Crash.ll 
llvm-svn: 42920
 2007-10-12 18:05:47 +00:00
Chris Lattner
3e99eb25ee testcase for PR1728 
llvm-svn: 42890
 2007-10-12 05:29:53 +00:00
Devang Patel
899cc56612 Lower memcpy if it makes sense. 
llvm-svn: 42864
 2007-10-11 17:21:57 +00:00
Devang Patel
a69f987b66 Fix bug in updating dominance frontier after loop 
unswitch when frontier includes basic blocks that 
are not inside loop.

llvm-svn: 42654
 2007-10-05 22:29:34 +00:00
Devang Patel
2a60ff1aeb Relax unsafe use check. If there is one unconditional use inside the loop then it is safe to promote value even if there is another conditional use inside the loop. 
llvm-svn: 42493
 2007-10-01 18:12:58 +00:00
Devang Patel
7bba386f72 Handle multiple induction variables. 
This fixes PR714.

llvm-svn: 42309
 2007-09-25 18:24:48 +00:00
Devang Patel
87d7e8ebcb Add transformation to update loop interation space. Now, 
for (i=A; i<N; i++) {
  if (i < X && i > Y)
    do_something();
}

is transformed into

U=min(N,X); L=max(A,Y);
for (i=L;i<U;i++)
  do_somethihg();                            

llvm-svn: 42299
 2007-09-25 17:31:19 +00:00
Devang Patel
9e30e1a3be Do not promote null values because it may be unsafe to do so. 
llvm-svn: 42270
 2007-09-24 20:02:42 +00:00
Devang Patel
361e52f39c Fix PR1692 
llvm-svn: 42209
 2007-09-21 21:18:19 +00:00
Duncan Sands
416b9f0410 Testcase for PR1678. 
llvm-svn: 42171
 2007-09-20 18:56:24 +00:00
Nick Lewycky
e7be16a053 Excuse me. 
llvm-svn: 42158
 2007-09-20 00:57:00 +00:00
Nick Lewycky
eae7e7d00b Fix optimization. %x = sub %x, %y does not imply that %y is zero. 
llvm-svn: 42157
 2007-09-20 00:48:36 +00:00
Devang Patel
464276f831 Avoid unsafe promotion. 
llvm-svn: 42149
 2007-09-19 20:18:51 +00:00
Gabor Greif
49122edc98 rename test, it is obviously misspelled 
llvm-svn: 42108
 2007-09-18 21:42:39 +00:00
Devang Patel
fcda998ab2 Fix PR1657 
llvm-svn: 42075
 2007-09-18 01:54:42 +00:00
Dan Gohman
2ac2652779 Instcombine x-((x/y)*y) into a remainder operator. 
llvm-svn: 42035
 2007-09-17 17:31:57 +00:00
Chris Lattner
dd76f2f4ab remove obsolete tests. 
llvm-svn: 41984
 2007-09-15 17:38:04 +00:00
Duncan Sands
94580c7522 Test that a call to a trampoline is turned into a call to 
the underlying nested function.

llvm-svn: 41846
 2007-09-11 15:07:50 +00:00
Chris Lattner
6cf04f4952 remove obsolete testcase 
llvm-svn: 41820
 2007-09-10 23:51:41 +00:00
Chris Lattner
52fe869374 Fix a buggy constant folding transformation when handling aliases. 
llvm-svn: 41818
 2007-09-10 23:42:42 +00:00
Dale Johannesen
62a48cea56 Add missing llvm-dis. 
llvm-svn: 41813
 2007-09-10 22:47:59 +00:00
Chris Lattner
c75cbe6473 Prevent tailcallelim from breaking "recursive" calls to builtins. 
llvm-svn: 41804
 2007-09-10 20:58:55 +00:00
Devang Patel
f8ab0a9acc Filter exit conditions which are not yet handled. 
llvm-svn: 41800
 2007-09-10 18:33:42 +00:00
Chris Lattner
85a51e0060 Don't zap back to back volatile load/stores 
llvm-svn: 41759
 2007-09-07 05:33:03 +00:00
Nick Lewycky
b0b066eaaa When the two operands of an icmp are equal, there are five possible predicates 
that would make the icmp true. Fixes PR1637.

llvm-svn: 41740
 2007-09-06 01:10:22 +00:00
Dale Johannesen
6480cc6f8c Change all floating constants that are not exactly 
representable to use hex format.

llvm-svn: 41722
 2007-09-05 17:50:36 +00:00
Anton Korobeynikov
24fb6b2f8c Don't promote volatile loads/stores. This is needed (for example) to handle setjmp/longjmp properly. 
This fixes PR1520.

llvm-svn: 41461
 2007-08-26 21:43:30 +00:00
Devang Patel
c1ef32ef3d Constant split values needs upper bound and lower bound check, just like any other split value. 
llvm-svn: 41389
 2007-08-25 01:09:14 +00:00