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2837 Commits

Author SHA1 Message Date
Dale Johannesen
c84816a62e Make local RA smarter about reusing input register of a copy 
as output.  Needed for (functional) correctness in inline asm,
and should be generally beneficial.  7361612.

llvm-svn: 95050
 2010-02-02 02:08:02 +00:00
Evan Cheng
a49d8e6d38 Fix PR6196. GV callee may not be a function. 
llvm-svn: 95017
 2010-02-01 22:40:09 +00:00
Dan Gohman
36bca4e4ba Update this test for a trivial register allocation difference. 
llvm-svn: 94989
 2010-02-01 19:00:32 +00:00
Evan Cheng
ed8ca56eeb Undo r94946 now all the tests are passing again. 
llvm-svn: 94970
 2010-02-01 02:13:39 +00:00
Evan Cheng
7f62def0f9 Avoid recursive sibcall's. 
llvm-svn: 94946
 2010-01-31 06:44:49 +00:00
Anton Korobeynikov
25df248382 Fix a gross typo: ARMv6+ may or may not support unaligned memory operations. 
Even if they are suported by the core, they can be disabled
(this is just a configuration bit inside some register).

Allow unaligned memops on darwin and conservatively disallow them otherwise.

llvm-svn: 94889
 2010-01-30 14:08:12 +00:00
Evan Cheng
70f714fdbe Allow more tailcall optimization: calls with inputs that are all passed in registers. 
llvm-svn: 94873
 2010-01-30 01:22:00 +00:00
Evan Cheng
297a494f55 Catch more trivial tail call opportunities: no inputs and output types match. 
llvm-svn: 94804
 2010-01-29 06:45:59 +00:00
Chris Lattner
cc9a6f0580 convert the last 3 targets to use EmitFunctionBody() now that 
it has before/end body hooks.

 lib/Target/Alpha/AsmPrinter/AlphaAsmPrinter.cpp |   49 ++-----------
 lib/Target/Mips/AsmPrinter/MipsAsmPrinter.cpp   |   87 ++++++------------------
 lib/Target/XCore/AsmPrinter/XCoreAsmPrinter.cpp |   56 +++------------
 test/CodeGen/XCore/ashr.ll                      |    2 
 4 files changed, 48 insertions(+), 146 deletions(-)

llvm-svn: 94741
 2010-01-28 06:22:43 +00:00
Evan Cheng
346af88396 Fix a bug introduced by r94490 where it created a X86ISD::CMP whose output type is different from its inputs. 
This fixes PR6146.

llvm-svn: 94731
 2010-01-28 01:57:22 +00:00
Chris Lattner
73de5fbfc3 Give AsmPrinter the most common expected implementation of 
runOnMachineFunction, and switch PPC to use EmitFunctionBody.
The two ppc asmprinters now don't heave to define 
runOnMachineFunction.

llvm-svn: 94722
 2010-01-28 01:28:58 +00:00
Chris Lattner
565896b9eb emit a 0 byte instead of a noop if a function is empty on darwin. 
"0" is nice and target independent.

llvm-svn: 94718
 2010-01-28 01:06:32 +00:00
Chandler Carruth
4fe7a3bc08 Quick fix to a test that is currently failing on every Linux build bot. No idea 
if this is the "correct" fix, but it seems a strict improvement.

llvm-svn: 94675
 2010-01-27 10:36:15 +00:00
Evan Cheng
85476f304c Perform trivial tail call optimization for callees with "C" ABI. These are done 
even when -tailcallopt is not specified and it does not require changing ABI.
First case is the most trivial one. Perform tail call optimization when both
the caller and callee do not return values and when the callee does not take
any input arguments.

llvm-svn: 94664
 2010-01-27 06:25:16 +00:00
Chris Lattner
b657c4cdc3 emit jump table an alias ".set" directives through MCStreamer as 
assignments.

.set x, a-b

is the same as:

x = a-b

llvm-svn: 94596
 2010-01-26 21:53:08 +00:00
Rafael Espindola
dcb03f0f6b Emit .comm alignment in bytes but .align in powers of 2 for ARM ELF. 
Original patch by Sandeep Patel and updated by me.

llvm-svn: 94582
 2010-01-26 20:21:43 +00:00
Chris Lattner
3dd38a8112 eliminate MCAsmInfo::NeedsSet: we now just use .set on any platform 
that has it.

llvm-svn: 94581
 2010-01-26 20:20:43 +00:00
Evan Cheng
555f61bf58 Implement cond ? -1 : 0 with sbb. 
llvm-svn: 94490
 2010-01-26 02:00:44 +00:00
Rafael Espindola
4cb52db485 Update test for darwin. 
llvm-svn: 94421
 2010-01-25 15:32:10 +00:00
Chris Lattner
9b83727cfe we removed support for darwin8 tools. 
llvm-svn: 94414
 2010-01-25 07:43:40 +00:00
Rafael Espindola
a1141dd6ab Fix PR6134. 
We are not emitting alignments on Darwin for "bar". Not sure what is the
correct way to do it.

llvm-svn: 94400
 2010-01-25 02:27:39 +00:00
Daniel Dunbar
75652a6f2b Attempt to unbreak test on Linux. Chris, please check. 
llvm-svn: 94399
 2010-01-25 00:54:13 +00:00
Chris Lattner
45dd2327cb just remove this test, it is not reduced, is not clear what its testing for and 
it is dying due to fragility in the asmprinter .s comments.

llvm-svn: 94372
 2010-01-24 19:23:09 +00:00
Mon P Wang
4f45512c23 It seems better to scalarize vectors of size 1 instead of widening them. 
Add support to widen SETCC.

llvm-svn: 94342
 2010-01-24 00:24:43 +00:00
Mon P Wang
586d997e98 Improved widening loads by adding support for wider loads if 
the alignment allows.  Fixed a bug where we didn't use a
vector load/store for PR5626.

llvm-svn: 94338
 2010-01-24 00:05:03 +00:00
Chris Lattner
d1acffc845 Change constantexpr global variable initializers to convert the constants 
to MCExpr then emit them through MCStreamer with EmitValue.  I think all
global variable initializers are now going through mcstreamer.

llvm-svn: 94293
 2010-01-23 06:17:14 +00:00
Eric Christopher
c1451d764f Don't lower splat vector load to relative to the esp if the 
stack may be misaligned.

Update test accordingly.

Patch by Evan Cheng!

llvm-svn: 94291
 2010-01-23 06:02:43 +00:00
Chris Lattner
82b86b0fce stop testing for invalid output. 
llvm-svn: 94288
 2010-01-23 05:45:28 +00:00
Chris Lattner
68eeb5ec9c emit .ascii and .asciz through MCStreamer. 
llvm-svn: 94282
 2010-01-23 04:54:10 +00:00
Chris Lattner
cabb6ff64d remove this test. 
llvm-svn: 94276
 2010-01-23 03:11:10 +00:00
Evan Cheng
8204911e1d Fix test. 
llvm-svn: 94272
 2010-01-23 01:21:27 +00:00
Evan Cheng
e1b8b5a01b Fix tests. 
llvm-svn: 94271
 2010-01-23 01:19:28 +00:00
Chris Lattner
88b8b1b419 make this less constrained, we want blank lines between globals. 
llvm-svn: 94201
 2010-01-22 19:51:08 +00:00
Dan Gohman
045f81981a Revert LoopStrengthReduce.cpp to pre-r94061 for now. 
llvm-svn: 94123
 2010-01-22 00:46:49 +00:00
Chris Lattner
1526375827 testcase for r94095 
llvm-svn: 94096
 2010-01-21 20:01:04 +00:00
Dan Gohman
51ad99d2c5 Re-implement the main strength-reduction portion of LoopStrengthReduction. 
This new version is much more aggressive about doing "full" reduction in
cases where it reduces register pressure, and also more aggressive about
rewriting induction variables to count down (or up) to zero when doing so
reduces register pressure.

It currently uses fairly simplistic algorithms for finding reuse
opportunities, but it introduces a new framework allows it to combine
multiple strategies at once to form hybrid solutions, instead of doing
all full-reduction or all base+index.

llvm-svn: 94061
 2010-01-21 02:09:26 +00:00
Chris Lattner
f8dcf784a7 emit basic block labels with mcstreamer. 
llvm-svn: 93993
 2010-01-20 07:24:05 +00:00
Chris Lattner
4c8b1824f0 emit integer and fp zeros as (e.g.) .byte 0 instead of .space 1, 
for tidiness.

llvm-svn: 93992
 2010-01-20 07:19:19 +00:00
Chris Lattner
03cb2a3035 signficant cleanups to EmitGlobalConstant (including streamerization 
of int initializers), change some methods to be static functions,
use raw_ostream::write_hex instead of a smallstring dance with 
APValue::toStringUnsigned(S, 16).

llvm-svn: 93991
 2010-01-20 07:11:32 +00:00
Dan Gohman
954f49014d Fold (add x, shl(0 - y, n)) -> sub(x, shl(y, n)), to simplify some code 
that SCEVExpander can produce when running on behalf of LSR.

llvm-svn: 93949
 2010-01-19 23:30:49 +00:00
Dan Gohman
221708d826 Make SCEVAddRecExpr's getType return a pointer type when the add 
has a pointer member. This helps reduce unnecessary bitcasting
and uglygeps.

llvm-svn: 93939
 2010-01-19 22:53:50 +00:00
Dan Gohman
fb9bea7150 Add nounwinds. 
llvm-svn: 93919
 2010-01-19 21:51:51 +00:00
Jakob Stoklund Olesen
bdc17f6840 Remove predicates when changing an add into an unpredicable mov. 
Since the mov is executed unconditionally, make sure that the add didn't have
any predicate.

llvm-svn: 93909
 2010-01-19 21:08:28 +00:00
Evan Cheng
bf43525a29 Do not extend extension results beyond the use of a PHI instruction at the start of a use block. A PHI use is expected to kill its source values. 
llvm-svn: 93895
 2010-01-19 19:45:51 +00:00
Chris Lattner
a6368219ac don't let asm-verbose break the check-next lines in these tests. 
llvm-svn: 93869
 2010-01-19 06:39:54 +00:00
Chris Lattner
c7a062d187 Now that we have everything nicely factored (e.g. asmprinter is not 
doing global variable classification anymore) and hookized, sink almost
all target targets global variable emission code into AsmPrinter and out
of each target.

Some notes:

1. PIC16 does completely custom and crazy stuff, so it is not changed.
2. XCore has some custom handling for extra directives.  I'll look at it next.
3. This switches linux/ppc to use .globl instead of .global.  If .globl is
   actually wrong, let me know and I'll fix it.
4. This makes linux/ppc get a lot of random cases right which were obviously
   wrong before, it is probably now a bit healthier.
5. Blackfin will probably start getting .comm and other things that it didn't
   before.  If this is undesirable, it should explicitly opt out of these
   things by clearing the relevant fields of MCAsmInfo.

This leads to a nice diffstat:
 14 files changed, 127 insertions(+), 830 deletions(-)

llvm-svn: 93858
 2010-01-19 05:38:33 +00:00
Chris Lattner
a986aa33eb fix a significant difference between llvm and gcc on ELF systems: 
GCC would put weak zero initialized mutable data in the .bss section,
we would put it into a crasy '.gnu.linkonce.b.test,"aw",@nobits' 
section.  Fixing this will allow simplifications next up.

llvm-svn: 93844
 2010-01-19 03:06:01 +00:00
Chris Lattner
024734e0f0 there is no need to emit a .section above .comm on linux. 
llvm-svn: 93842
 2010-01-19 02:46:56 +00:00
Evan Cheng
4668a3b935 Test case for r93758. 
llvm-svn: 93824
 2010-01-19 00:35:20 +00:00
Evan Cheng
88b65bc835 Canonicalize -1 - x to ~x. 
Instcombine does this but apparently there are situations where this pattern will escape the optimizer and / or created by isel. Here is a case that's seen in JavaScriptCore:
  %t1 = sub i32 0, %a
  %t2 = add i32 %t1, -1
The dag combiner pattern: ((c1-A)+c2) -> (c1+c2)-A
will fold it to -1 - %a.

llvm-svn: 93773
 2010-01-18 21:38:44 +00:00