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8c41157459
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26742 Commits

Author SHA1 Message Date
Owen Anderson
8c41157459 Stage two of fixing pre-alloc-splitting's code size issues: filter out restores that are just 
going to be re-spilled again.

This also helps performance.  Pre-alloc-splitting now seems to be an overall win on SPEC.

llvm-svn: 62834
 2009-01-23 03:28:53 +00:00
Evan Cheng
7cdc6e4f8c Cross register class coalescing. Not yet enabled. 
llvm-svn: 62832
 2009-01-23 02:15:19 +00:00
Devang Patel
86e54f5636 Code did not follow associated comment. not a good idea. 
llvm-svn: 62828
 2009-01-23 01:25:58 +00:00
Devang Patel
b638679d9d Set appropriate tag for the composite type. 
llvm-svn: 62827
 2009-01-23 01:19:09 +00:00
Chris Lattner
f2adaaa0fc a minor tweak to my previous patch, handle the invalidation case 
when there are multiple iterations of the loop.  This fixes PR3375.

llvm-svn: 62822
 2009-01-23 00:27:03 +00:00
Owen Anderson
b9426381f3 Add an initial pass at dead spill/restore removal for pre alloc splitting. 
llvm-svn: 62821
 2009-01-23 00:23:32 +00:00
Chris Lattner
c843f0f484 do not sign extend characters input to isprint. This improves 
compatibility with VC++.  Patch by Max Burke!

llvm-svn: 62813
 2009-01-22 23:38:45 +00:00
Bob Wilson
d79e684d1e Fix a minor bug in DAGCombiner's folding of SELECT. Folding "select C, 0, 1" 
to "C ^ 1" is only valid when C is known to be either 0 or 1.  Most of the
similar foldings in this function only handle "i1" types, but this one appears
intentionally written to handle larger integer types.  If C has an integer
type larger than "i1", this needs to check if the high bits of a boolean
are known to be zero.  I also changed the comment to describe this folding as
"C ^ 1" instead of "~C", since that is what the code does and since the latter
would only be valid for "i1" types.  The good news is that most LLVM targets
use TargetLowering::ZeroOrOneBooleanContent so this change will not disable
the optimization; the bad news is that I've been unable to come up with a
testcase to demonstrate the problem.

I have also removed a "FIXME" comment for folding "select C, X, 0" to "C & X",
since the code looks correct to me.  It could be made more aggressive by not
limiting the type to "i1", but that would then require checking for
TargetLowering::ZeroOrNegativeOneBooleanContent.  Similar changes could be
done for the other SELECT foldings, but it was decided to be not worth the
trouble and complexity (see e.g., r44663).

llvm-svn: 62790
 2009-01-22 22:05:48 +00:00
Dan Gohman
a6e5948fce Don't create ISD::FNEG nodes after legalize if they aren't legal. 
Simplify x+0 to x in unsafe-fp-math mode. This avoids a bunch of
redundant work in many cases, because in unsafe-fp-math mode,
ISD::FADD with a constant is considered free to negate, so the
DAGCombiner often negates x+0 to -0-x thinking it's free, when
in reality the end result is -x, which is more expensive than x.

Also, combine x*0 to 0.

This fixes PR3374.

llvm-svn: 62789
 2009-01-22 21:58:43 +00:00
Gabor Greif
d56b0a8c03 introduce a useful abstraction to find out if a Use is in the call position of an instruction 
llvm-svn: 62788
 2009-01-22 21:35:57 +00:00
Tanya Lattner
33f3303401 Revert r62553 and r62616 due to issues with portability. 
llvm-svn: 62777
 2009-01-22 20:09:20 +00:00
Chris Lattner
da545d3918 rename methods in System/Host to be more consistent. 
llvm-svn: 62776
 2009-01-22 19:53:00 +00:00
Bob Wilson
186046e657 Add SelectionDAG::getNOT method to construct bitwise NOT operations, 
corresponding to the "not" and "vnot" PatFrags.  Use the new method
in some places where it seems appropriate.

llvm-svn: 62768
 2009-01-22 17:39:32 +00:00
Sanjiv Gupta
7173c05b38 Few targets like the tiny little PIC16 have only 16-bit pointers. 
llvm-svn: 62763
 2009-01-22 10:14:21 +00:00
Evan Cheng
c971801ae1 Eliminate a couple of fields from TargetRegisterClass: SubRegClasses and SuperRegClasses. These are not necessary. Also eliminate getSubRegisterRegClass and getSuperRegisterRegClass. These are slow and their results can change if register file names change. Just use TargetLowering::getRegClassFor() to get the right TargetRegisterClass instead. 
llvm-svn: 62762
 2009-01-22 09:10:11 +00:00
Chris Lattner
92f592ad8b fix a typo 
llvm-svn: 62761
 2009-01-22 07:21:55 +00:00
Chris Lattner
fcf56e7fbe add a note 
llvm-svn: 62760
 2009-01-22 07:16:03 +00:00
Chris Lattner
ddc8e78d54 Fix PR3358, a really nasty bug where recursive phi translated 
analyses could be run without the caches properly sorted.  This
can fix all sorts of weirdness.  Many thanks to Bill for coming
up with the 'issorted' verification idea.

llvm-svn: 62757
 2009-01-22 07:04:01 +00:00
Dan Gohman
29b575c6cd Recognize inline asm for bswap on x86-64 GLIBC. This allows it 
to be supported in the JIT.

llvm-svn: 62730
 2009-01-21 23:40:54 +00:00
Dale Johannesen
a5699a1e8b Do not use host floating point types when emitting 
ASCII IR; loading and storing these can change the
bits of NaNs on some hosts.  Remove or add warnings
at a few other places using host floating point;
this is a bad thing to do in general.

llvm-svn: 62712
 2009-01-21 20:32:55 +00:00
Evan Cheng
43d680b0d8 Also favors NOT64r. 
llvm-svn: 62710
 2009-01-21 19:45:31 +00:00
Chris Lattner
2b6b947b4f fix warning in release-asserts mode and spelling of assert. 
llvm-svn: 62699
 2009-01-21 18:38:18 +00:00
Chris Lattner
b4ffb1f824 add getPointerToGlobal to the C bindings, patch by Lennart Augustsson! 
PR3364

llvm-svn: 62697
 2009-01-21 18:11:10 +00:00
Chris Lattner
ca83aa289a Remove uses of uint32_t in favor of 'unsigned' for better 
compatibility with cygwin.  Patch by Jay Foad!

llvm-svn: 62695
 2009-01-21 18:09:24 +00:00
Dan Gohman
d021a20409 Simplify ReduceLoadWidth's logic: it doesn't need several different 
special cases after producing the new reduced-width load, because the
new load already has the needed adjustments built into it. This fixes
several bugs due to the special cases, including PR3317.

llvm-svn: 62692
 2009-01-21 15:17:51 +00:00
Dan Gohman
704f0d5879 Fix a recent regression. ClrOpcode is not set for i8; for i8, if 
we want to clear %ah to zero before a division, just use a
zero-extending mov to %al. This fixes PR3366.

llvm-svn: 62691
 2009-01-21 14:50:16 +00:00
Mikhail Glushenkov
898af4fdfa Mimic gcc behaviour with regard to response files. 
llvm-svn: 62688
 2009-01-21 13:14:02 +00:00
Sanjiv Gupta
ebef67f13c Fixed build warnings. Restoring changes done in 62600, they were lost in 62655. 
llvm-svn: 62681
 2009-01-21 09:02:46 +00:00
Duncan Sands
392dc77fc6 Cleanup whitespace and comments, and tweak some 
prototypes, in operand type legalization.  No
functionality change.

llvm-svn: 62680
 2009-01-21 09:00:29 +00:00
Owen Anderson
d1a2413f88 I accidentally removed this check in an earlier commit, which cause breakage in the pre alloc splitter. 
llvm-svn: 62678
 2009-01-21 08:18:03 +00:00
Sanjiv Gupta
37fdb5ca11 Implement LowerOperationWrapper for legalizer. 
Also a few signed comparison fixes.

llvm-svn: 62665
 2009-01-21 05:44:05 +00:00
Scott Michel
c80e71ac35 CellSPU: 
- Ensure that (operation) legalization emits proper FDIV libcall when needed.
- Fix various bugs encountered during llvm-spu-gcc build, along with various
  cleanups.
- Start supporting double precision comparisons for remaining libgcc2 build.
  Discovered interesting DAGCombiner feature, which is currently solved via
  custom lowering (64-bit constants are not legal on CellSPU, but DAGCombiner
  insists on inserting one anyway.)
- Update README.

llvm-svn: 62664
 2009-01-21 04:58:48 +00:00
Sanjiv Gupta
074553c4fb Allow targets to legalize operations (with illegal operands) that produces multiple values. For example, a load with an illegal operand (a load produces two values, a value and chain). 
llvm-svn: 62663
 2009-01-21 04:48:39 +00:00
Evan Cheng
0ed6a9d7e0 Favors generating "not" over "xor -1". For example. 
unsigned test(unsigned a) {
  return ~a;
}
llvm used to generate:
movl    $4294967295, %eax
xorl    4(%esp), %eax

Now it generates:
movl      4(%esp), %eax
notl      %eax

It's 3 bytes shorter.

llvm-svn: 62661
 2009-01-21 02:09:05 +00:00
Dale Johannesen
6854f86296 Make special cases (0 inf nan) work for frem. 
Besides APFloat, this involved removing code
from two places that thought they knew the
result of frem(0., x) but were wrong.

llvm-svn: 62645
 2009-01-21 00:35:19 +00:00
Owen Anderson
10ad717dc8 Be more aggressive about renumbering vregs after splitting them. 
llvm-svn: 62639
 2009-01-21 00:13:28 +00:00
Devang Patel
c129e798c7 Encode member accessibility. 
llvm-svn: 62638
 2009-01-21 00:08:04 +00:00
Devang Patel
bb4362571a Appropriately mark fowrad decls. 
llvm-svn: 62625
 2009-01-20 22:27:02 +00:00
Evan Cheng
5bea79c062 Fix PR3243: a LiveVariables bug. When HandlePhysRegKill is checking whether the last reference is also the last def (i.e. dead def), it should also check if last reference is the current machine instruction being processed. This can happen when it is processing a physical register use and setting the current machine instruction as sub-register's last ref. 
llvm-svn: 62617
 2009-01-20 21:25:12 +00:00
Duncan Sands
eb7ffc9654 Fix typo. Patch by Alexei Svitkine. 
llvm-svn: 62616
 2009-01-20 21:20:23 +00:00
Bill Wendling
cf901346da Use "SINT_TO_FP" instead of "UINT_TO_FP" when getting the exponent. This was 
causing the limited precision stuff to produce the wrong result for values in
the range [0, 1).

llvm-svn: 62615
 2009-01-20 21:17:57 +00:00
Devang Patel
4c79c8be26 Fix struct member's debug info. 
llvm-svn: 62610
 2009-01-20 21:02:02 +00:00
Devang Patel
ccc3162f69 Need only one set of debug info versions enum. 
llvm-svn: 62602
 2009-01-20 19:22:03 +00:00
Evan Cheng
b3c82db63d Change TargetInstrInfo::isMoveInstr to return source and destination sub-register indices as well. 
llvm-svn: 62600
 2009-01-20 19:12:24 +00:00
Devang Patel
10f2f03c68 Fix global variable's address in a DIE. 
llvm-svn: 62596
 2009-01-20 18:55:39 +00:00
Devang Patel
7f6ef3bdd6 Enable debug info for enums. 
llvm-svn: 62594
 2009-01-20 18:35:14 +00:00
Dale Johannesen
c9e6e85a38 Add an IEEE remainder function, which is not 
fully implemented yet and not used.  This is
mainly to clarify that APFloat::mod implements
C fmod, not remainder.

llvm-svn: 62593
 2009-01-20 18:35:05 +00:00
Chris Lattner
8ab719c566 improve compatibility with various versions of graphviz, patch by 
Patrick Boettcher!

llvm-svn: 62592
 2009-01-20 18:25:03 +00:00
Chris Lattner
391f04d56e Eliminate use of uint32_t to improve compatibility with cygwin 
llvm-svn: 62590
 2009-01-20 18:22:57 +00:00
Devang Patel
6bd9ebdef8 Enable debug info for composite types. 
llvm-svn: 62589
 2009-01-20 18:13:03 +00:00