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e273e42195
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2843 Commits

Author SHA1 Message Date
Evan Cheng
e273e42195 Revert 94937 and move the noreturn check to codegen. 
llvm-svn: 95198
 2010-02-03 03:55:59 +00:00
Evan Cheng
d9cf09b0d6 Allow all types of callee's to be tail called. But avoid automatic tailcall if the callee is a result of bitcast to avoid losing necessary zext / sext etc. 
llvm-svn: 95195
 2010-02-03 03:28:02 +00:00
Dale Johannesen
1e9d147461 Reapply 95050 with a tweak to check the register class. 
llvm-svn: 95183
 2010-02-03 01:40:33 +00:00
Chris Lattner
2b798aafd0 make these less sensitive to asm verbose changes by disabling it for them. 
llvm-svn: 95175
 2010-02-03 00:48:53 +00:00
Dale Johannesen
08ab638bdc Test revert 95050; there's a good chance it's causing 
buildbot failure.

llvm-svn: 95103
 2010-02-02 18:52:56 +00:00
Evan Cheng
fac0fdc6a0 Perform sibcall in some cases when arguments are passes memory. Look for cases 
where callee's arguments are already in the caller's own caller's stack and
they line up perfectly. e.g.

extern int foo(int a, int b, int c);

int bar(int a, int b, int c) {
  return foo(a, b, c);
}

llvm-svn: 95053
 2010-02-02 02:22:50 +00:00
Dale Johannesen
a20fc3d1a9 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
efa391da81 Fix PR6196. GV callee may not be a function. 
llvm-svn: 95017
 2010-02-01 22:40:09 +00:00
Dan Gohman
7b3c210a47 Update this test for a trivial register allocation difference. 
llvm-svn: 94989
 2010-02-01 19:00:32 +00:00
Evan Cheng
dcc1816642 Undo r94946 now all the tests are passing again. 
llvm-svn: 94970
 2010-02-01 02:13:39 +00:00
Evan Cheng
b5f97d871c Avoid recursive sibcall's. 
llvm-svn: 94946
 2010-01-31 06:44:49 +00:00
Anton Korobeynikov
f7651ec593 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
40ae22e14d 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
2cbd1b19db 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
d7a8482810 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
7e26fdaa78 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
95118672e3 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
df1662f0e6 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
4b62a01a0c 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
381bc804d6 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
ee2b6b1cc5 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
f46baf3304 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
044439c9bc 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
548d00d77c Implement cond ? -1 : 0 with sbb. 
llvm-svn: 94490
 2010-01-26 02:00:44 +00:00
Rafael Espindola
575697fd65 Update test for darwin. 
llvm-svn: 94421
 2010-01-25 15:32:10 +00:00
Chris Lattner
2020423588 we removed support for darwin8 tools. 
llvm-svn: 94414
 2010-01-25 07:43:40 +00:00
Rafael Espindola
82a8b3efd4 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
c1df55e99c Attempt to unbreak test on Linux. Chris, please check. 
llvm-svn: 94399
 2010-01-25 00:54:13 +00:00
Chris Lattner
6fdaf12267 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
d4d1cbb72b 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
871ea08e40 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
1b7c00a4f2 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
e6d6bfcc32 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
e5e7b41090 stop testing for invalid output. 
llvm-svn: 94288
 2010-01-23 05:45:28 +00:00
Chris Lattner
20a336f1df emit .ascii and .asciz through MCStreamer. 
llvm-svn: 94282
 2010-01-23 04:54:10 +00:00
Chris Lattner
4515320f9f remove this test. 
llvm-svn: 94276
 2010-01-23 03:11:10 +00:00
Evan Cheng
9523142c01 Fix test. 
llvm-svn: 94272
 2010-01-23 01:21:27 +00:00
Evan Cheng
3bd9efa510 Fix tests. 
llvm-svn: 94271
 2010-01-23 01:19:28 +00:00
Chris Lattner
5f6aca81b6 make this less constrained, we want blank lines between globals. 
llvm-svn: 94201
 2010-01-22 19:51:08 +00:00
Dan Gohman
525f7d7833 Revert LoopStrengthReduce.cpp to pre-r94061 for now. 
llvm-svn: 94123
 2010-01-22 00:46:49 +00:00
Chris Lattner
75db03497a testcase for r94095 
llvm-svn: 94096
 2010-01-21 20:01:04 +00:00
Dan Gohman
be34c35f32 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
e4ac42e11e emit basic block labels with mcstreamer. 
llvm-svn: 93993
 2010-01-20 07:24:05 +00:00
Chris Lattner
d69a9cc334 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
3104fa4a71 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
34b548b94a 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
94c0e08951 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
190fee462e Add nounwinds. 
llvm-svn: 93919
 2010-01-19 21:51:51 +00:00
Jakob Stoklund Olesen
e7d4286d73 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
4b916556a5 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