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267 Commits

Author SHA1 Message Date
Dan Gohman
9365affecc Add support for folding binary operators with vector zero operands. 
llvm-svn: 43510
 2007-10-30 19:00:49 +00:00
Chris Lattner
875ca50576 update testcase 
llvm-svn: 43452
 2007-10-29 17:06:35 +00:00
Chris Lattner
3d6151bcd1 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
7e3a8a7604 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
891066cfff 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
483c471daa 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
df262eb966 Don't branch fold inline asm statements. 
llvm-svn: 43191
 2007-10-19 21:09:55 +00:00
Devang Patel
d002595abf This test now passes. 
llvm-svn: 43183
 2007-10-19 17:11:01 +00:00
Chris Lattner
efaf4ba65d 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
13e0df71e0 XFAIL for now. 
llvm-svn: 43111
 2007-10-18 00:48:43 +00:00
Devang Patel
9cb3c09156 Do not raise free() call that is called through invoke instruction. 
llvm-svn: 43083
 2007-10-17 20:12:58 +00:00
Devang Patel
cf2f9d6daa 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
3af877f26a 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
7489b40996 testcase for PR1728 
llvm-svn: 42890
 2007-10-12 05:29:53 +00:00
Devang Patel
15d6257fa8 Lower memcpy if it makes sense. 
llvm-svn: 42864
 2007-10-11 17:21:57 +00:00
Devang Patel
36b68478cb 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
42f006a51a 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
d98abb62ce Handle multiple induction variables. 
This fixes PR714.

llvm-svn: 42309
 2007-09-25 18:24:48 +00:00
Devang Patel
de9d1c3654 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
65f8d0c2d7 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
b741c56cfc Fix PR1692 
llvm-svn: 42209
 2007-09-21 21:18:19 +00:00
Duncan Sands
425fe2a97b Testcase for PR1678. 
llvm-svn: 42171
 2007-09-20 18:56:24 +00:00
Nick Lewycky
9edfec9b3c Excuse me. 
llvm-svn: 42158
 2007-09-20 00:57:00 +00:00
Nick Lewycky
3baa4cde1c 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
648d7a1074 Avoid unsafe promotion. 
llvm-svn: 42149
 2007-09-19 20:18:51 +00:00
Gabor Greif
fd6f1faeeb rename test, it is obviously misspelled 
llvm-svn: 42108
 2007-09-18 21:42:39 +00:00
Devang Patel
4014965efb Fix PR1657 
llvm-svn: 42075
 2007-09-18 01:54:42 +00:00
Dan Gohman
2de5779a99 Instcombine x-((x/y)*y) into a remainder operator. 
llvm-svn: 42035
 2007-09-17 17:31:57 +00:00
Chris Lattner
890c3898e0 remove obsolete tests. 
llvm-svn: 41984
 2007-09-15 17:38:04 +00:00
Duncan Sands
c99bc3e76f 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
fe8bd8b113 remove obsolete testcase 
llvm-svn: 41820
 2007-09-10 23:51:41 +00:00
Chris Lattner
f08a077fa9 Fix a buggy constant folding transformation when handling aliases. 
llvm-svn: 41818
 2007-09-10 23:42:42 +00:00
Dale Johannesen
e017870ae6 Add missing llvm-dis. 
llvm-svn: 41813
 2007-09-10 22:47:59 +00:00
Chris Lattner
ab8aa7d61a Prevent tailcallelim from breaking "recursive" calls to builtins. 
llvm-svn: 41804
 2007-09-10 20:58:55 +00:00
Devang Patel
76790c1b28 Filter exit conditions which are not yet handled. 
llvm-svn: 41800
 2007-09-10 18:33:42 +00:00
Chris Lattner
8e6c39d961 Don't zap back to back volatile load/stores 
llvm-svn: 41759
 2007-09-07 05:33:03 +00:00
Nick Lewycky
2f66503c0a 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
f9ca7b6094 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
3dffac0c59 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
d961a55c5a 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
Devang Patel
027410a7aa While calculating upper loop bound for first loop and lower loop bound for second loop, take care of edge cases. 
llvm-svn: 41387
 2007-08-25 00:56:38 +00:00
Devang Patel
6c91023dad Do not split loops rejected by processOneIterationLoop(). 
llvm-svn: 41194
 2007-08-20 20:24:15 +00:00
Devang Patel
cf22d4b1f8 Add loop index split tests. 
llvm-svn: 41146
 2007-08-17 22:02:15 +00:00
Dan Gohman
34263074cb Convert tests using "grep -c ... | grep ..." to use the count script. 
llvm-svn: 41100
 2007-08-15 13:49:33 +00:00
Dan Gohman
794fa1f8f7 Convert tests using "| wc -l | grep ..." to use the count script. 
llvm-svn: 41097
 2007-08-15 13:36:28 +00:00
Chris Lattner
cab9f1e32b oops, forgot to commit this. 
llvm-svn: 41034
 2007-08-12 16:55:14 +00:00
Chris Lattner
50f25115cd Transform a load from an undef/zero global into an undef/global even if we 
have complex pointer manipulation going on.  This allows us to compile
stuff like this:

__m128i foo(__m128i x){
                static const unsigned int c_0[4] = { 0, 0, 0, 0 };
                __m128i v_Zero = _mm_loadu_si128((__m128i*)c_0);
                x  = _mm_unpacklo_epi8(x,  v_Zero);
                return x;
}

into:

_foo:
        xorps   %xmm1, %xmm1
        punpcklbw       %xmm1, %xmm0
        ret

llvm-svn: 41022
 2007-08-11 18:48:48 +00:00
Chris Lattner
3548932573 when we see a unaligned load from an insufficiently aligned global or 
alloca, increase the alignment of the load, turning it into an aligned load.

This allows us to compile:

#include <xmmintrin.h>
__m128i foo(__m128i x){
 static const unsigned int c_0[4] = { 0, 0, 0, 0 };
	  __m128i v_Zero = _mm_loadu_si128((__m128i*)c_0);
  x  = _mm_unpacklo_epi8(x,  v_Zero);
  return x;
}

into:

_foo:
	punpcklbw	_c_0.5944, %xmm0
	ret
	.data
	.lcomm	_c_0.5944,16,4		# c_0.5944

instead of:

_foo:
	movdqu	_c_0.5944, %xmm1
	punpcklbw	%xmm1, %xmm0
	ret
	.data
	.lcomm	_c_0.5944,16,2		# c_0.5944

llvm-svn: 40971
 2007-08-09 19:05:49 +00:00
Nick Lewycky
34cf98c558 It's safe to fold not of fcmp. 
llvm-svn: 40870
 2007-08-06 20:04:16 +00:00
Chandler Carruth
00e56b0e81 This is the patch to provide clean intrinsic function overloading support in LLVM. It cleans up the intrinsic definitions and generally smooths the process for more complicated intrinsic writing. It will be used by the upcoming atomic intrinsics as well as vector and float intrinsics in the future. 
This also changes the syntax for llvm.bswap, llvm.part.set, llvm.part.select, and llvm.ct* intrinsics. They are automatically upgraded by both the LLVM ASM reader and the bitcode reader. The test cases have been updated, with special tests added to ensure the automatic upgrading is supported.

llvm-svn: 40807
 2007-08-04 01:51:18 +00:00