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24929 Commits

Author SHA1 Message Date
Jakob Stoklund Olesen
7c699f92cd Don't do illegal cross-class coalescing. 
llvm-svn: 98044
 2010-03-09 03:56:06 +00:00
Evan Cheng
19e44b4510 - Make the machine cse dumb coalescer (as opposed to the more awesome simple 
coalescer) handle sub-register classes.
- Add heuristics to avoid non-profitable cse. Given the current lack of live
  range splitting, avoid cse when an expression has PHI use and the would be
  new use is in a BB where the expression wasn't already being used.

llvm-svn: 98043
 2010-03-09 03:21:12 +00:00
Eric Christopher
66194fbf86 Speculatively revert r98035. It appears to have caused a set of buildbot 
failures.

llvm-svn: 98039
 2010-03-09 02:36:31 +00:00
Dan Gohman
52cc041ee5 Attempt to make this debug output meaningful, both in the case of 
multibyte opcodes and in the case of multiple scopes.

llvm-svn: 98036
 2010-03-09 02:15:05 +00:00
Chris Lattner
06c5e9060c Now that setStartLabel takes an MCSymbol, we can de-ID'ize 
beginScope and RecordSourceLine.

llvm-svn: 98035
 2010-03-09 02:08:02 +00:00
Chris Lattner
e13c37232a change DbgScope to keep track of the start/end label as MCSymbol* 
now that the dependence on ID is removed from MMI.

llvm-svn: 98034
 2010-03-09 01:58:53 +00:00
Chris Lattner
a552246b3d remove a useless optimization: now that label replacement never 
happens, the start/end of a scope can never be the same.

llvm-svn: 98032
 2010-03-09 01:52:43 +00:00
Chris Lattner
c3b70f636f strength reduce MMI::MappedLabel to MMI::isLabelDeleted, 
and add a FIXME about how we are eventually going to zap this
lookup table once mc world domination is complete.

llvm-svn: 98031
 2010-03-09 01:51:43 +00:00
Chris Lattner
9e57c676dd mcstreamerize AsmPrinter::printLabel. 
llvm-svn: 98025
 2010-03-09 01:02:30 +00:00
Jakob Stoklund Olesen
1d9eb4667d Disable physical register coalescing when the number of live ranges for the 
physreg becomes ridiculously high.

std::upper_bound may be log(N), but for sufficiently large live intervals, it
becomes log(N)*cachemiss = a long long time.

This patch improves coalescer time by 4500x for a function with 20000
function calls. The generated code is different, but not significantly worse -
the allocator hints are almost as good as physreg coalescing anyway.

llvm-svn: 98023
 2010-03-09 00:59:48 +00:00
Chris Lattner
b14490d912 add a EmitSymbolValue convenience method to MCStreamer. 
llvm-svn: 98017
 2010-03-09 00:39:24 +00:00
Chris Lattner
085b65283c make InlineInfoLabels hold MCSymbol*'s, avoiding 
recomputation of the labels.

llvm-svn: 98016
 2010-03-09 00:31:02 +00:00
Chris Lattner
53d6d1e87d mc'ize the last use of PrintLabelName and eliminate PrintLabelName. 
llvm-svn: 98015
 2010-03-09 00:26:09 +00:00
Chris Lattner
292ec6c299 eliminate an argument from PrintRelDirective, sinking 
the one special case into EmitSectionOffset.  MCize
the non-special case in EmitSectionOffset.

llvm-svn: 98014
 2010-03-09 00:17:58 +00:00
Dan Gohman
f6fb1e0d93 Print the correct index in the "match failed at index" message. 
llvm-svn: 98013
 2010-03-09 00:07:36 +00:00
Chris Lattner
b242ae6dcc remove the suffix form of PrintLabelName, which was only 
used for 'flavor'.

llvm-svn: 98012
 2010-03-09 00:00:57 +00:00
Chris Lattner
4d728127fb now that the debug and eh emitters use a common .set counter, 
we can eliminate "flavor".

llvm-svn: 98011
 2010-03-09 00:00:15 +00:00
Chris Lattner
9889c1eb9e move .set generation out of DwarfPrinter into AsmPrinter and 
MCize it.

llvm-svn: 98010
 2010-03-08 23:58:37 +00:00
Evan Cheng
c9e8621268 Don't waste time trying to CSE labels, phis, inline asm. Definitely avoid cse implicit-def for obvious performance reason. 
llvm-svn: 98009
 2010-03-08 23:49:12 +00:00
Evan Cheng
6ec41ee33c Restrict machine cse to really trivial coalescing. Leave the heavy lifting to a real coalescer. 
llvm-svn: 98007
 2010-03-08 23:28:08 +00:00
Chris Lattner
27a9732450 simplify EmitSectionOffset to always use .set if it is 
available, the only thing this affects is that we produce
.set in one case we didn't before, which shouldn't harm
anything.  Make EmitSectionOffset call EmitDifference
instead of duplicating it.

llvm-svn: 98005
 2010-03-08 23:23:25 +00:00
Chris Lattner
449a9ff14b Remove a version of EmitDifference. 
llvm-svn: 98002
 2010-03-08 23:02:59 +00:00
Chris Lattner
ee20b5f236 eliminate a form of PrintLabelName. 
llvm-svn: 97999
 2010-03-08 22:52:49 +00:00
Chris Lattner
3c081995f6 remove another form of EmitReference. 
llvm-svn: 97998
 2010-03-08 22:50:36 +00:00
Chris Lattner
b779eb6a1d eliminate the non-MCSymbol versions of EmitReference. 
llvm-svn: 97997
 2010-03-08 22:47:57 +00:00
Chris Lattner
722714dde2 mc'ize EmitLabel. 
llvm-svn: 97996
 2010-03-08 22:44:40 +00:00
Chris Lattner
8dcf41ed66 merge DIEObjectLabel and DIEDwarfLabel into DIELabel. 
Yes, DIE you fiendish labels, die all of you.

llvm-svn: 97995
 2010-03-08 22:31:46 +00:00
Chris Lattner
bc9210cb70 elimiante the DWLabel class, using MCSymbol instead. Start 
switching some stuff over to passing around MCSymbol* instead
of stem+ID.

llvm-svn: 97993
 2010-03-08 22:23:36 +00:00
Devang Patel
8119fe87d8 Derive DIType from DIScope. This simplifies getContext() where for members the context is a type. This also eliminates need of CompileUnitMaps maintained by dwarf writer. 
llvm-svn: 97990
 2010-03-08 22:02:50 +00:00
Devang Patel
3b548aa8e2 Avoid using DIDescriptor.isNull(). 
This is a first step towards eliminating checks in Descriptor constructors.

llvm-svn: 97975
 2010-03-08 20:52:55 +00:00
Devang Patel
bc97f6b757 Revert r97947. 
llvm-svn: 97963
 2010-03-08 19:20:38 +00:00
Devang Patel
fe28599f6f Avoid using DIDescriptor.isNull(). 
This is a first step towards eliminating unncessary constructor checks in light weight DIDescriptor wrappers.

llvm-svn: 97947
 2010-03-08 18:25:48 +00:00
Dale Johannesen
30488c636d Add Order to SDDbgValue 
llvm-svn: 97939
 2010-03-08 05:39:50 +00:00
Dale Johannesen
0eebdbb325 Fix dbg value handling in tail merging. 
llvm-svn: 97938
 2010-03-08 05:38:13 +00:00
Douglas Gregor
9abb538be0 Revert r97917, which was causing Clang Debug self-host failures. 
llvm-svn: 97932
 2010-03-08 02:58:37 +00:00
Jeffrey Yasskin
37a0372fc4 Roll r97906 forward again, without double-deleting CompileUnit::IndexTyDie. 
llvm-svn: 97917
 2010-03-07 17:10:13 +00:00
Chris Lattner
28dc6c12c3 Use Other as a sentinel instead of iAny. 
llvm-svn: 97914
 2010-03-07 07:45:08 +00:00
Jeffrey Yasskin
7068bdba50 _2_ gcc crashes, ah, ah, ah... 
(Rolling back r97906.)

llvm-svn: 97909
 2010-03-07 07:16:49 +00:00
Jeffrey Yasskin
413721b050 Avoid leaking CompileUnits and DbgScopes from DwarfDebug. Leaks found by Valgrind! 
llvm-svn: 97906
 2010-03-07 06:55:35 +00:00
Chris Lattner
ef2f8047fa tidy up 
llvm-svn: 97895
 2010-03-07 04:28:09 +00:00
Evan Cheng
0f5f54784a Don't update physical register def. 
llvm-svn: 97861
 2010-03-06 01:14:19 +00:00
Dale Johannesen
10a77adede Add some new bits of debug info handling. No 
functional change yet.

llvm-svn: 97855
 2010-03-06 00:03:23 +00:00
Dan Gohman
14e450f595 Reapply r97778 and r97779, enabled only for unsigned i64 to f64 
conversions.

llvm-svn: 97854
 2010-03-06 00:00:55 +00:00
Charles Davis
8545afe0b0 Don't emit global symbols into the (__TEXT,__ustring) section on Darwin. This 
is a workaround for <rdar://problem/7672401/> (which I filed).

This let's us build Wine on Darwin, and it gets the Qt build there a little bit
further (so Doug says).

llvm-svn: 97845
 2010-03-05 22:28:45 +00:00
Jakob Stoklund Olesen
2664d295cb Better handling of dead super registers in LiveVariables. We used to do this: 
CALL ... %RAX<imp-def>
   ... [not using %RAX]
   %EAX = ..., %RAX<imp-use, kill>
   RET %EAX<imp-use,kill>

Now we do this:

   CALL ... %RAX<imp-def, dead>
   ... [not using %RAX]
   %EAX = ...
   RET %EAX<imp-use,kill>

By not artificially keeping %RAX alive, we lower register pressure a bit.

The correct number of instructions for 2008-08-05-SpillerBug.ll is obviously
55, anybody can see that. Sheesh.

llvm-svn: 97838
 2010-03-05 21:49:17 +00:00
Jakob Stoklund Olesen
8c5b8db5cd We don't really care about correct register liveness information after the 
post-ra scheduler has run. Disable the verifier checks that late in the game.

llvm-svn: 97837
 2010-03-05 21:49:13 +00:00
Jakob Stoklund Olesen
b0503beff1 Avoid creating bad PHI instructions when BR is being const-folded. 
llvm-svn: 97836
 2010-03-05 21:49:10 +00:00
Chris Lattner
55e81eb49f Fix PR6497, a bug where we'd fold a load into an addc 
node which has a flag.  That flag in turn was used by an
already-selected adde which turned into an ADC32ri8 which
used a selected load which was chained to the load we
folded.  This flag use caused us to form a cycle.  Fix
this by not ignoring chains in IsLegalToFold even in
cases where the isel thinks it can.

llvm-svn: 97791
 2010-03-05 06:19:13 +00:00
Chris Lattner
374a3ac744 inline a small function with one call site. 
llvm-svn: 97789
 2010-03-05 05:49:45 +00:00
Dan Gohman
998c7c2614 Revert r97778 and r97779. They're somehow breaking llvm-gcc builds. 
llvm-svn: 97781
 2010-03-05 02:40:23 +00:00