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244 Commits

Author SHA1 Message Date
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
Chris Lattner
4670f15d73 I don't have time to restore this functionality right now. 
llvm-svn: 40743
 2007-08-02 17:43:39 +00:00
Chris Lattner
f0f4024c46 Reduced testcase for PR1594 
llvm-svn: 40740
 2007-08-02 17:11:24 +00:00
Devang Patel
937b07fb5e Update dominator info for the middle blocks created while spliting 
exit edge to preserve LCSSA.

Fix dominance frontier update during loop unswitch. This fixes PR 1589, again

llvm-svn: 40737
 2007-08-02 15:25:57 +00:00
Chris Lattner
0111f62050 Enhance instcombine to be more aggressive about folding casts of 
operations of casts.  This implements InstCombine/zext-fold.ll

llvm-svn: 40726
 2007-08-02 06:11:14 +00:00
Chris Lattner
2cacb6cc56 Fix PR1575 and test/Transforms/CondProp/2007-08-01-InvalidRead.ll 
llvm-svn: 40720
 2007-08-02 04:47:05 +00:00
Devang Patel
51c61e730a Update dominator info for the middle blocks created while spliting 
exit edge to preserve LCSSA.

Fix dominance frontier update during loop unswitch. This fixes PR 1589.

llvm-svn: 40695
 2007-08-01 22:23:50 +00:00
Owen Anderson
86544141cf Forgot to update these files for the FastDSE changes. 
llvm-svn: 40674
 2007-08-01 16:53:51 +00:00
Owen Anderson
58e64df595 Rename FastDSE to just DSE. 
llvm-svn: 40668
 2007-08-01 06:36:51 +00:00
Owen Anderson
9c996b3212 Fix a failure I accidentally caused in my last commit by mishandling the 
removal of redundant phis.

llvm-svn: 40650
 2007-07-31 20:18:28 +00:00
Lauro Ramos Venancio
abf6c6d469 Fix a bug in GetKnownAlignment of packed structs. 
llvm-svn: 40649
 2007-07-31 20:13:21 +00:00
Dan Gohman
e3464e6bec Change the x86 assembly output to use tab characters to separate the 
mnemonics from their operands instead of single spaces. This makes the
assembly output a little more consistent with various other compilers
(f.e. GCC), and slightly easier to read. Also, update the regression
tests accordingly.

llvm-svn: 40648
 2007-07-31 20:11:57 +00:00
Owen Anderson
d178c05c62 Fix a misoptimization in aha. 
llvm-svn: 40642
 2007-07-31 17:43:14 +00:00
Devang Patel
1324500d25 Bunch of tests to check loop passes. 
llvm-svn: 40629
 2007-07-31 08:04:17 +00:00
Owen Anderson
a8d0a6ee40 Fix a bug caused by indiscriminantly asking for the dominators of a predecessor. 
llvm-svn: 40595
 2007-07-30 16:57:08 +00:00
Owen Anderson
ed3e63a203 Fix a bug introduced in my last commit. 
llvm-svn: 40542
 2007-07-26 18:57:04 +00:00
Owen Anderson
f2b10d3de3 Fix a couple more bugs in the phi construction by pulling in code that does 
almost the same things from LCSSA.

llvm-svn: 40540
 2007-07-26 18:26:51 +00:00
Owen Anderson
ed75133924 Fix what is _hopefully_ the last corner case for loops. 
llvm-svn: 40503
 2007-07-25 23:54:42 +00:00
Owen Anderson
1e53615073 My last commit was not correct for nested loops. Fix it, and add a testcase for it. 
llvm-svn: 40498
 2007-07-25 22:19:40 +00:00
Owen Anderson
ce9d73dbe7 Fix an infinite loop on 300.twolf. 
llvm-svn: 40497
 2007-07-25 22:03:06 +00:00
Owen Anderson
b215074820 Fix a bug in non-local memdep that was causing an infinite loop on 175.vpr. 
llvm-svn: 40495
 2007-07-25 21:26:36 +00:00
Owen Anderson
522f7a7608 Fix a bug that was causing GVN to crash on 252.eon. 
llvm-svn: 40494
 2007-07-25 21:13:41 +00:00
Owen Anderson
6a1a8d05b8 Add basic support for performing whole-function RLE. 
Note: This has not yet been thoroughly tested.  Use at your own risk.

llvm-svn: 40489
 2007-07-25 19:57:03 +00:00
Owen Anderson
eb9f1b612c Add a GVN pass, using the value numbering code I developed for GVNPRE and the 
load elimination code from RedundantLoadElimination.

llvm-svn: 40469
 2007-07-24 17:55:58 +00:00