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Author SHA1 Message Date
Rafael Espindola
b20b9e985a propagate struct size and alignment of byval arguments to the DAG 
llvm-svn: 40986
 2007-08-10 14:44:42 +00:00
Bill Wendling
d0bee665d3 For kicks, I though it would be fun to use the correct opcode. 
llvm-svn: 40985
 2007-08-10 09:00:17 +00:00
Chris Lattner
f570f023cf memcpy with zero length is hugely expensive, so avoid it. This speeds up coallescing from 1.17s to 0.88s on siod. 
llvm-svn: 40984
 2007-08-10 07:02:50 +00:00
Chris Lattner
8995eae095 small speedup in the case where a smallvector is default ctor'd from 
an empty vector.  This speeds up llc slightly.

llvm-svn: 40983
 2007-08-10 06:54:38 +00:00
Bill Wendling
55c3dc2409 Adding SSSE3 intrinsics. 
llvm-svn: 40982
 2007-08-10 06:22:27 +00:00
Chris Lattner
de5f6f921a minor simplifications. 
llvm-svn: 40981
 2007-08-10 06:22:25 +00:00
Chris Lattner
bbe3b1dbee avoid copying strings. 
llvm-svn: 40980
 2007-08-10 06:17:04 +00:00
Devang Patel
b1160475fd Remove unncessary duplication. 
llvm-svn: 40979
 2007-08-10 00:59:03 +00:00
Devang Patel
23c5e2dcd3 Calculate exit and start value of true loop and false loop respectively. 
llvm-svn: 40978
 2007-08-10 00:53:35 +00:00
Devang Patel
51da0a465a ExitCondition and Induction variable are loop constraints 
not split condition constraints.

llvm-svn: 40977
 2007-08-10 00:33:50 +00:00
Chris Lattner
202e7f84e9 unbreak the build 
llvm-svn: 40976
 2007-08-09 23:55:17 +00:00
Evan Cheng
0293fe7483 Bug fix. ~1U marks the val# dead. 
llvm-svn: 40975
 2007-08-09 23:14:39 +00:00
Dale Johannesen
21c0eac378 Patch 10 for long double. Doing constants right needs expanding ConstantFP 
to handle values bigger than double.  If we assume host==target and host
long double works correctly, this is not too bad, but we don't want to
have that limitation longterm.  I could implement accepting double
constants as long double or something like that, which would lead to
incorrect codegen with no errors; the more I think about that the worse
it seems.  Rather than do such a hack that would be backed out later,
I'm settling for giving reasonable error messages, for now.

llvm-svn: 40974
 2007-08-09 22:51:36 +00:00
Evan Cheng
3fae8e1c4a Temporarily backing out this change until we know why some dejagnu tests are failing. 
llvm-svn: 40973
 2007-08-09 22:25:35 +00:00
Evan Cheng
a58ebc46dd divb / mulb outputs to ah. Under x86-64 it's not legal to read ah if the instruction requires a rex prefix (i.e. outputs to r8b, etc.). So issue shift right by 8 on AX and then truncate it to 8 bits instead. 
llvm-svn: 40972
 2007-08-09 21:59:35 +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
Evan Cheng
a822456bed GR16_ sub-register class should be GR8_, not GR8. That is, it should only be 8-bit registers in 32-bit mode. Ditto for GR32_. 
llvm-svn: 40970
 2007-08-09 18:05:17 +00:00
Dale Johannesen
a1340d5916 Update per review comments. 
llvm-svn: 40965
 2007-08-09 17:27:48 +00:00
Owen Anderson
3eba1e8f5c Make NonLocal and None const in the right way. :-) 
llvm-svn: 40961
 2007-08-09 04:42:44 +00:00
Devang Patel
652613b1db Traverse loop blocks' terminators to find split candidates. 
llvm-svn: 40960
 2007-08-09 01:39:01 +00:00
Dale Johannesen
79551baaad long double 9 of N. This finishes up the X86-32 bits 
(constants are still not handled).  Adds ConvertActions
to control fp-to-fp conversions (these are currently
defaulted for all other targets, so no changes there).

llvm-svn: 40958
 2007-08-09 01:04:01 +00:00
Dale Johannesen
6c8f73eac6 Fix arguments for some Altivec instructions. From SWB. 
llvm-svn: 40957
 2007-08-09 00:49:19 +00:00
Scott Michel
86052f49c0 If a target really needs to custom lower constants, it should be allowed 
to do so.

llvm-svn: 40955
 2007-08-08 23:23:31 +00:00
Owen Anderson
3db807751b Add more comments to memdep. 
llvm-svn: 40953
 2007-08-08 22:26:03 +00:00
Devang Patel
30bf54b9d3 Add cost analysis. 
llvm-svn: 40952
 2007-08-08 22:25:28 +00:00
Owen Anderson
d791c9f667 Make memdep fit in 80 cols. 
llvm-svn: 40950
 2007-08-08 22:01:54 +00:00
Owen Anderson
24f6b332cb Add one more comment. 
llvm-svn: 40949
 2007-08-08 21:54:33 +00:00
Owen Anderson
f4aec9115f Cleanup and comment-ize the memdep header. 
llvm-svn: 40948
 2007-08-08 21:53:20 +00:00
Devang Patel
ed9b08c44f Preserve dom info while processing one iteration loop. 
llvm-svn: 40947
 2007-08-08 21:39:47 +00:00
Owen Anderson
f988c3ee5c Change the None and NonLocal markers in memdep to be const. 
llvm-svn: 40946
 2007-08-08 21:39:39 +00:00
Reid Spencer
e6c778f11a Separate program name from error message with a : 
llvm-svn: 40945
 2007-08-08 21:19:01 +00:00
Devang Patel
a74e533c5e Clear split info. 
llvm-svn: 40944
 2007-08-08 21:18:27 +00:00
Reid Spencer
0bc68c6e6e Terminate an error message with a newline. 
llvm-svn: 40943
 2007-08-08 21:17:59 +00:00
Devang Patel
4bd07b86ae Handle multiple split conditions. 
llvm-svn: 40941
 2007-08-08 21:02:17 +00:00
Reid Spencer
6f88014eeb Make it clear that getSTDIN returns null when stdin is empty. 
llvm-svn: 40940
 2007-08-08 20:02:20 +00:00
Reid Spencer
e8aa5a5832 Make getSTDIN return null if the standard input is empty, as the header file 
documentation implies and as its uses depend.

llvm-svn: 40939
 2007-08-08 20:01:58 +00:00
Reid Spencer
c5f311aa70 Allow the filename "-" to be a place holder for stdin. This allows directing 
stdin through llvm-ld and llvm-link.

llvm-svn: 40938
 2007-08-08 19:52:29 +00:00
Owen Anderson
04ba98d0f5 Global values also don't undead-ify pointers in our dead alloca's set. 
llvm-svn: 40936
 2007-08-08 19:12:31 +00:00
Owen Anderson
fd772509e9 Make handleEndBlock significantly faster with one trivial improvement, 
and one hack to avoid hitting a bad case when the alias analysis is imprecise.

llvm-svn: 40935
 2007-08-08 18:38:28 +00:00
Owen Anderson
930610cceb Small improvement: if a function doesn't access memory, we don't need to scan 
it for potentially undeading pointers.

llvm-svn: 40933
 2007-08-08 17:58:56 +00:00
Owen Anderson
ecd9348bd6 Add some comments, remove a dead argument, and simplify some control flow. 
No functionality change.

llvm-svn: 40932
 2007-08-08 17:50:09 +00:00
Chris Lattner
a7dce8c173 eliminate redundant conditions from the signless types conversion. 
llvm-svn: 40927
 2007-08-08 16:19:57 +00:00
Chris Lattner
3e94308eb7 Handle functions with no name better. 
llvm-svn: 40926
 2007-08-08 16:07:23 +00:00
Evan Cheng
5227e36428 Adding kill info to val#. 
llvm-svn: 40925
 2007-08-08 07:03:29 +00:00
Chris Lattner
606d5bced1 significantly speed up constant folding of calls (and thus all clients that use 
ConstantFoldInstruction on calls) by avoiding Value::getName().  getName() constructs
and returns an std::string, which does heap allocation stuff.  This slightly speeds up
instcombine.

llvm-svn: 40924
 2007-08-08 06:55:43 +00:00
Chris Lattner
b8959ef7a1 Speed up updateDFSNumbers with two observations: 
1. domtree is a tree, not a graph.  There is no need to avoid revisiting nodes with a set.
2. the worklist can contain the child iterator pointers so we don't get N^2 rescanning of children.

This speeds up updateDFSNumbers significantly, making it basically free.  On the testcase in PR1432,
this speeds up loopsimplify by another 3x, dropping it from the 12th most expensive pass to the to
the 30th. :)  It used to be #1.

llvm-svn: 40923
 2007-08-08 06:24:20 +00:00
Owen Anderson
02298f7388 A few more small cleanups. 
llvm-svn: 40922
 2007-08-08 06:06:02 +00:00
Evan Cheng
02e7fbd7c8 Clean up and bug fix. 
llvm-svn: 40921
 2007-08-08 05:56:18 +00:00
Chris Lattner
65d638a918 reimplement dfs number computation to be significantly faster. This speeds up 
natural loop canonicalization (which does many cfg xforms) by 4.3x, for 
example.  This also fixes a bug in postdom dfnumber computation.

llvm-svn: 40920
 2007-08-08 05:51:24 +00:00
Owen Anderson
a9facda8db First round of cleanups from Chris' feedback. 
llvm-svn: 40919
 2007-08-08 04:52:29 +00:00