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276 Commits

Author SHA1 Message Date
Jim Grosbach 63a8eaf559 Tweak to ignoring reserved regs. The allocator was occasionally still looking 
at them since they'd end up in the register weights list. Tell it to stop
doing that.

llvm-svn: 112756
 2010-09-01 22:48:34 +00:00
Jim Grosbach d5e72a1e84 tidy up trailing whitespace and an 80 column violation. 
llvm-svn: 112746
 2010-09-01 21:48:06 +00:00
Jim Grosbach 9dce31438d cleanup per feedback. use a helper function for getting the first non-reserved 
physical register in a register class. Make sure to assert if the register
class is empty.

llvm-svn: 112743
 2010-09-01 21:34:41 +00:00
Jim Grosbach 5ccf18c2fc The register allocator shouldn't consider allocating reserved registers. 
r112728 did this for fast regalloc.

llvm-svn: 112741
 2010-09-01 21:04:27 +00:00
Jakob Stoklund Olesen 27e1f26534 Clean up the Spiller.h interface. 
The earliestStart argument is entirely specific to linear scan allocation, and
can be easily calculated by RegAllocLinearScan.

Replace std::vector with SmallVector.

llvm-svn: 111055
 2010-08-13 22:56:53 +00:00
Owen Anderson a7aed18624 Reapply r110396, with fixes to appease the Linux buildbot gods. 
llvm-svn: 110460
 2010-08-06 18:33:48 +00:00
Owen Anderson bda59bd247 Revert r110396 to fix buildbots. 
llvm-svn: 110410
 2010-08-06 00:23:35 +00:00
Owen Anderson 755aceb5d0 Don't use PassInfo* as a type identifier for passes. Instead, use the address of the static 
ID member as the sole unique type identifier.  Clean up APIs related to this change.

llvm-svn: 110396
 2010-08-05 23:42:04 +00:00
Jim Grosbach 7383cf06ba Grammar 
llvm-svn: 109525
 2010-07-27 18:36:27 +00:00
Owen Anderson a57b97e7e7 Fix batch of converting RegisterPass<> to INTIALIZE_PASS(). 
llvm-svn: 109045
 2010-07-21 22:09:45 +00:00
Jakob Stoklund Olesen 0fef9dda8e Change the createSpiller interface to take a MachineFunctionPass argument. 
The spillers can pluck the analyses they need from the pass reference.

Switch some never-null pointers to references.

llvm-svn: 108969
 2010-07-20 23:50:15 +00:00
Jakob Stoklund Olesen a58a7e7f9e Spillers may alter MachineLoopInfo when breaking critical edges, so make it 
non-const.

llvm-svn: 108734
 2010-07-19 18:41:20 +00:00
Jakob Stoklund Olesen 37c42a3d02 Remove many calls to TII::isMoveInstr. Targets should be producing COPY anyway. 
TII::isMoveInstr is going tobe completely removed.

llvm-svn: 108507
 2010-07-16 04:45:42 +00:00
Jakob Stoklund Olesen 00264624a9 Convert EXTRACT_SUBREG to COPY when emitting machine instrs. 
EXTRACT_SUBREG no longer appears as a machine instruction. Use COPY instead.

Add isCopy() checks in many places using isMoveInstr() and isExtractSubreg().
The isMoveInstr hook will be removed later.

llvm-svn: 107879
 2010-07-08 16:40:22 +00:00
Eric Christopher 5e5416056b 80-col fixup. 
llvm-svn: 107537
 2010-07-02 23:17:38 +00:00
Jakob Stoklund Olesen 2b87d44c5d Don't return a std::vector in the Spiller interface, but take a reference to a 
vector instead. This avoids needless copying and allocation.

Add documentation.

llvm-svn: 106788
 2010-06-24 20:54:29 +00:00
Chris Lattner 93cd0f1c89 improve portability to systems that don't have powf/modf (e.g. solaris 9) 
patch by Evzen Muller!

llvm-svn: 103876
 2010-05-15 17:10:24 +00:00
Chris Lattner 2104b8d36e rename llvm::llvm_report_error -> llvm::report_fatal_error 
llvm-svn: 100709
 2010-04-07 22:58:41 +00:00
Jakob Stoklund Olesen 391700872f Remove dead code 
llvm-svn: 97261
 2010-02-26 21:09:20 +00:00
David Greene 025e934d54 Change errs() to dbgs(). 
llvm-svn: 92583
 2010-01-05 01:25:20 +00:00
Douglas Gregor 740ab38bb7 Fix a bunch of little errors that Clang complains about when its being pedantic 
llvm-svn: 91764
 2009-12-19 07:05:23 +00:00
Lang Hames d17e296301 Moved spill weight calculation out of SimpleRegisterCoalescing and into its own pass: CalculateSpillWeights. 
llvm-svn: 91273
 2009-12-14 06:49:42 +00:00
Jakob Stoklund Olesen 497161c40b Also attempt trivial coalescing for live intervals that end in a copy. 
The coalescer is supposed to clean these up, but when setting up parameters
for a function call, there may be copies to physregs. If the defining
instruction has been LICM'ed far away, the coalescer won't touch it.

The register allocation hint does not always work - when the register
allocator is backtracking, it clears the hints.

This patch is more conservative than r90502, and does not break
483.xalancbmk/i686. It still breaks the PowerPC bootstrap, so it is disabled
by default, and can be enabled with the -trivial-coalesce-ends option.

llvm-svn: 91049
 2009-12-10 17:48:32 +00:00
Lang Hames 1ab2b49e6d Added a new "splitting" spiller. 
When a call is placed to spill an interval this spiller will first try to
break the interval up into its component values. Single value intervals and
intervals which have already been split (or are the result of previous splits)
are spilled by the default spiller.

Splitting intervals as described above may improve the performance of generated
code in some circumstances. This work is experimental however, and it still
miscompiles many benchmarks. It's not recommended for general use yet.

llvm-svn: 90951
 2009-12-09 05:39:12 +00:00
Bill Wendling f89986235d Temporarily revert r90502. It was causing the llvm-gcc bootstrap on PPC to fail. 
llvm-svn: 90653
 2009-12-05 07:30:23 +00:00