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Author SHA1 Message Date
Dan Gohman
900be69752 Fix a comment. 
llvm-svn: 96178
 2010-02-14 18:51:20 +00:00
Dan Gohman
de32b2fac0 When complicated expressions are broken down into subexpressions 
with multiplication by constants distributed through, occasionally
those subexpressions can include both x and -x. For now, if this
condition is discovered within LSR, just prune such cases away,
as they won't be profitable. This fixes a "zero allocated in a
base register" assertion failure.

llvm-svn: 96177
 2010-02-14 18:50:49 +00:00
Sanjiv Gupta
318fdf4e39 fixes to pagesel/banksel inserter. 
1. restore these across direct/indirect calls.
2. restore pagesel for any macros with gotos.

llvm-svn: 96175
 2010-02-14 18:27:42 +00:00
Anton Korobeynikov
3461f67cee Forgot to commit the header 
llvm-svn: 96174
 2010-02-14 18:25:41 +00:00
Chris Lattner
42c8f96141 follow-on to PR6280 
llvm-svn: 96172
 2010-02-14 18:20:09 +00:00
Anton Korobeynikov
9436d20d76 Drop winmcasminfo and use normal AT&T COFF for all windows targets. 
Otherwise AT&T asm printer is used with non-compatible MCAsmInfo and
there is no way to override this behaviour.

llvm-svn: 96165
 2010-02-14 15:19:54 +00:00
Johnny Chen
475f273d63 Try to factorize the specification of saturating add/subtract operations a bit, 
as suggested by Bob Wilson.

llvm-svn: 96153
 2010-02-14 06:32:20 +00:00
Dan Gohman
dbffcb6c92 Actually, this code doesn't have to be quite so conservative in 
the no-TLI case. But it should still default to declining the
transformation.

llvm-svn: 96152
 2010-02-14 03:21:49 +00:00
Dan Gohman
4d5f3b74e4 In rememberInstruction, if the value being remembered is the 
current insertion point, advance the current insertion point.
This avoids a use-before-def situation in a testcase extracted
from clang which is difficult to reduce to a reasonable-sized
regression test.

llvm-svn: 96151
 2010-02-14 03:12:47 +00:00
Dan Gohman
47756a8549 Simplify this code; no need for a custom subclass if it doesn't need 
to override anything from the parent class.

llvm-svn: 96150
 2010-02-14 02:48:58 +00:00
Dan Gohman
8985140f3e Remove a 'protected' keyword, now that SCEVExpander is no longer 
intended to be subclassed.

llvm-svn: 96149
 2010-02-14 02:47:26 +00:00
Dan Gohman
3b065f43af Don't attempt aggressive post-inc uses if TargetLowering is not available, 
because profitability can't be sufficiently approximated.

llvm-svn: 96148
 2010-02-14 02:45:21 +00:00
Daniel Dunbar
59ecca73a9 2.7: Note that DataTypes.h moved. 
llvm-svn: 96143
 2010-02-14 01:47:19 +00:00
John McCall
5089836939 Make LSR not crash if invoked without target lowering info, e.g. if invoked 
from opt.

llvm-svn: 96135
 2010-02-13 23:40:16 +00:00
Eric Christopher
96f3c4222f Fix a problem where we had bitcasted operands that gave us 
odd offsets since the bitcasted pointer size and the offset pointer
size are going to be different types for the GEP vs base object.

llvm-svn: 96134
 2010-02-13 23:38:01 +00:00
Mikhail Glushenkov
09bf7f44e8 Forward parameter options as '-option=parameter'. 
Some tools do not like the '-option parameter' form. Should this be
configurable?

llvm-svn: 96130
 2010-02-13 22:37:28 +00:00
Mikhail Glushenkov
d823a2e8ee Support some more Darwin-only options. 
We really need a conditional compilation mechanism...

llvm-svn: 96129
 2010-02-13 22:37:13 +00:00
Mikhail Glushenkov
6de0557115 Support -mfix-and-continue properly. 
llvm-svn: 96128
 2010-02-13 22:37:00 +00:00
Mikhail Glushenkov
3b9bef0cfb Revert r94752, turns out we don't need to touch these options. 
llvm-svn: 96127
 2010-02-13 22:36:43 +00:00
Daniel Dunbar
2b76a91c60 Trim trailing spaces (aka, trigger rebuild). 
llvm-svn: 96126
 2010-02-13 22:23:47 +00:00
Chris Lattner
d971210bd9 pull a bunch of huge inline methods in the PatternCodeEmitter 
class out of line.

llvm-svn: 96113
 2010-02-13 20:06:50 +00:00
Chris Lattner
b9c4a15ad5 teach the encoder to handle pseudo instructions like FP_REG_KILL, 
encoding them into nothing.

llvm-svn: 96110
 2010-02-13 19:16:53 +00:00
Chris Lattner
23368e55d7 remove dead code. 
llvm-svn: 96109
 2010-02-13 19:07:06 +00:00
Daniel Dunbar
e6679afaa7 MCAssembler: Fix pcrel relocations. Oh and, 
--
ddunbar@ozzy:tmp$ clang -m32 -integrated-as hello.c && ./a.out
hello world!
--

llvm-svn: 96096
 2010-02-13 09:45:59 +00:00
Daniel Dunbar
c05a38a3d3 MC/Mach-O: Start emitting fixups/relocations for instructions. 
llvm-svn: 96095
 2010-02-13 09:29:02 +00:00
Daniel Dunbar
7a1fd21459 MCAssembler: Switch MCAsmFixup to storing MCFixupKind instead of just a size. 
llvm-svn: 96094
 2010-02-13 09:28:54 +00:00
Daniel Dunbar
8e9044353a MCAssembler: Sink fixup list into MCDataFragment. 
llvm-svn: 96093
 2010-02-13 09:28:43 +00:00
Daniel Dunbar
95ae012b0e MCAssembler: Switch MCFillFragment to only taking constant values. Symbolic expressions can always be emitted as data + fixups. 
llvm-svn: 96092
 2010-02-13 09:28:32 +00:00
Daniel Dunbar
cc282ba52e MC/Mach-O: Implement EmitValue using data fragments + fixups instead of fill fragment. 
llvm-svn: 96091
 2010-02-13 09:28:22 +00:00
Daniel Dunbar
481e926468 MCAssembler: Start applying fixups in the data section. 
llvm-svn: 96090
 2010-02-13 09:28:15 +00:00
Daniel Dunbar
a699e834fb MCAssembler: Add assorted dump() methods. 
llvm-svn: 96089
 2010-02-13 09:28:03 +00:00
Daniel Dunbar
1581cae46f X86: Move extended MCFixupKinds into X86FixupKinds.h 
llvm-svn: 96088
 2010-02-13 09:27:52 +00:00
Chris Lattner
0874dc6dab Split some code out to a helper function (FindReusablePredBB) 
and add a doxygen comment.

Cache the phi entry to avoid doing tons of 
PHINode::getBasicBlockIndex calls in the common case.

On my insane testcase from re2c, this speeds up CGP from
617.4s to 7.9s (78x).

llvm-svn: 96083
 2010-02-13 05:35:08 +00:00
Chris Lattner
9c797fdf1d Speed up codegen prepare from 3.58s to 0.488s. 
llvm-svn: 96081
 2010-02-13 05:01:14 +00:00
Chris Lattner
975da20868 PHINode::getBasicBlockIndex is O(n) in the number of inputs 
to a PHI, avoid it in the common case where the BB occurs
in the same index for multiple phis.  This speeds up CGP on
an insane testcase from 8.35 to 3.58s.

llvm-svn: 96080
 2010-02-13 04:24:19 +00:00
Chris Lattner
1a067d53b0 iterate over preds using PHI information when available instead of 
using pred_begin/end.  It is much faster.

llvm-svn: 96079
 2010-02-13 04:15:26 +00:00
Chris Lattner
9be0b06335 speed up CGP a bit by scanning predecessors through phi operands 
instead of with pred_begin/end.

llvm-svn: 96078
 2010-02-13 04:04:42 +00:00
Chris Lattner
8530ba626c add encoder support and tests for rdtscp 
llvm-svn: 96076
 2010-02-13 03:42:24 +00:00
Johnny Chen
f252f7cf0d Add SETEND and BXJ instructions for disassembly only. 
llvm-svn: 96075
 2010-02-13 02:51:09 +00:00
Sean Callanan
0bc10793b0 Added the rdtscp instruction to the x86 instruction 
tables.

llvm-svn: 96073
 2010-02-13 02:06:11 +00:00
Jakob Stoklund Olesen
0a65533a38 Fix PR6283. 
When coalescing with a physreg, remember to add imp-def and imp-kill when
dealing with sub-registers.

Also fix a related bug in VirtRegRewriter where substitutePhysReg may
reallocate the operand list on an instruction and invalidate the reg_iterator.
This can happen when a register is mentioned twice on the same instruction.

llvm-svn: 96072
 2010-02-13 02:06:10 +00:00
Dan Gohman
25722fd3fc Fix a pruning heuristic which implicitly assumed that SmallPtrSet is 
deterministically sorted.

llvm-svn: 96071
 2010-02-13 02:06:02 +00:00
Evan Cheng
6eb7ff5bbf Teach MachineFrameInfo to track maximum alignment while stack objects are being 
created. This ensures it's updated at all time. It means targets which perform
dynamic stack alignment would know whether it is required and whether frame
pointer register cannot be made available register allocation.
This is a fix for rdar://7625239. Sorry, I can't create a reasonably sized test
case.

llvm-svn: 96069
 2010-02-13 01:56:41 +00:00
Jakob Stoklund Olesen
8ce1b3d280 Enable the inlinehint attribute in the Inliner. 
Functions explicitly marked inline will get an inlining threshold slightly
more aggressive than the default for -O3. This means than -O3 builds are
mostly unaffected while -Os builds will be a bit bigger and faster.

The difference depends entirely on how many 'inline's are sprinkled on the
source.

In the CINT2006 suite, only these tests are significantly affected under -Os:

               Size   Time
471.omnetpp   +1.63% -1.85%
473.astar     +4.01% -6.02%
483.xalancbmk +4.60%  0.00%

Note that 483.xalancbmk runs too quickly to give useful timing results.

llvm-svn: 96066
 2010-02-13 01:51:53 +00:00
Sean Callanan
9806eade6e Fixed encodings for invlpg, invept, and invvpid. 
llvm-svn: 96065
 2010-02-13 01:48:34 +00:00
Daniel Dunbar
09733841aa MC/AsmParser: Attempt to constant fold expressions up-front. This ensures we avoid fixups for obvious cases like '-(16)'. 
llvm-svn: 96064
 2010-02-13 01:28:07 +00:00
Johnny Chen
727c71d8ac Added a bunch of saturating add/subtract instructions for disassembly only. 
llvm-svn: 96063
 2010-02-13 01:21:01 +00:00
Chris Lattner
d4fe983f23 rip out the 'heinous' x86 MCCodeEmitter implementation. 
We still have the templated X86 JIT emitter, *and* the
almost-copy in X86InstrInfo for getting instruction sizes.

llvm-svn: 96059
 2010-02-13 00:49:29 +00:00
Chris Lattner
5b01ab848c remove special cases for vmlaunch, vmresume, vmxoff, and swapgs 
fix swapgs to be spelled right.

llvm-svn: 96058
 2010-02-13 00:41:14 +00:00
Bob Wilson
5d66f81412 Besides removing phi cycles that reduce to a single value, also remove dead 
phi cycles.  Adjust a few tests to keep dead instructions from being optimized
away.  This (together with my previous change for phi cycles) fixes Apple
radar 7627077.

llvm-svn: 96057
 2010-02-13 00:31:44 +00:00