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54 Commits

Author SHA1 Message Date
Jakob Stoklund Olesen 9a2c6b8f3e Delete SplittingSpiller. It was not being used by anyone, and it is being 
superceded by SplitKit.

llvm-svn: 118754
 2010-11-11 00:52:44 +00:00
Andrew Trick 89eb6a8b94 RABasic is nearly functionally complete. There are a few remaining 
benchmarks hitting an assertion.
Adds LiveIntervalUnion::collectInterferingVRegs.
Fixes "late spilling" by checking for any unspillable live vregs among
all physReg aliases.

llvm-svn: 118701
 2010-11-10 19:18:47 +00:00
Jakob Stoklund Olesen 7cdc1e5f16 Make the spiller responsible for updating the LiveStacks analysis. 
llvm-svn: 117337
 2010-10-26 00:11:33 +00:00
Lang Hames 564956867e Removed VNInfo::isDefAccurate(). Def "accuracy" can be checked by testing whether LiveIntervals::getInstructionFromIndex(def) returns NULL. 
llvm-svn: 114791
 2010-09-25 12:04:16 +00:00
Jakob Stoklund Olesen 250fed25fd Remove the only use of SlotIndex::isPHI. This bit is not being set consistently 
and it will be removed shortly.

llvm-svn: 114778
 2010-09-25 00:45:15 +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
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 0c76d6ec21 Replace copyRegToReg with COPY everywhere in lib/CodeGen except for FastISel. 
llvm-svn: 108062
 2010-07-10 22:42:59 +00:00
Eric Christopher dfc8b745a2 Fix to 80-col. 
llvm-svn: 107684
 2010-07-06 18:35:20 +00:00
Jakob Stoklund Olesen 59e1cae377 Some fool committed without testing (or even building) first. 
llvm-svn: 107307
 2010-06-30 18:41:20 +00:00
Jakob Stoklund Olesen c39d3497c8 Remember to track spill slot uses in VirtRegMap when inserting loads and stores. 
LocalRewriter::runOnMachineFunction uses this information to mark dead spill
slots.

This means that InlineSpiller now also works for functions that spill.

llvm-svn: 107302
 2010-06-30 18:19:08 +00:00
Jakob Stoklund Olesen 08baf59da1 Use clEnumValN macro to work around keyword clash 
llvm-svn: 107233
 2010-06-30 00:24:51 +00:00
Jakob Stoklund Olesen f888911932 Begin implementation of an inline spiller. 
InlineSpiller inserts loads and spills immediately instead of deferring to
VirtRegMap. This is possible now because SlotIndexes allows instructions to be
inserted and renumbered.

This is work in progress, and is mostly a copy of TrivialSpiller so far. It
works very well for functions that don't require spilling.

llvm-svn: 107227
 2010-06-29 23:58:39 +00:00
Jakob Stoklund Olesen 55d738e2e1 Don't track kills in VNInfo. Use interval ends instead. 
The VNInfo.kills vector was almost unused except for all the code keeping it
updated. The few places using it were easily rewritten to check for interval
ends instead.

The two new methods LiveInterval::killedAt and killedInRange are replacements.

This brings us down to 3 independent data structures tracking kills.

llvm-svn: 106905
 2010-06-25 22:53:05 +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
Douglas Gregor 6739a89117 Fixes for Microsoft Visual Studio 2010, from Steven Watanabe! 
llvm-svn: 103457
 2010-05-11 06:17:44 +00:00
Dan Gohman 779c69bbc5 Add a DebugLoc argument to TargetInstrInfo::copyRegToReg, so that it 
doesn't have to guess.

llvm-svn: 103194
 2010-05-06 20:33:48 +00:00
Evan Cheng efb126a665 Add argument TargetRegisterInfo to loadRegFromStackSlot and storeRegToStackSlot. 
llvm-svn: 103193
 2010-05-06 19:06:44 +00:00
Evan Cheng f0ac19a6d5 80 col violation. 
llvm-svn: 103185
 2010-05-06 16:33:12 +00:00
Chris Lattner cc7bb24fe2 remove some unneeded errorhandling stuff. 
llvm-svn: 100703
 2010-04-07 22:44:07 +00:00
David Greene 9f23703919 Change errs() to dbgs(). 
llvm-svn: 92591
 2010-01-05 01:25:55 +00:00
Lang Hames 4c052261de Changed slot index ranges for MachineBasicBlocks to be exclusive of endpoint. 
This fixes an in-place update bug where code inserted at the end of basic blocks may not be covered by existing intervals which were live across the entire block. It is also consistent with the way ranges are specified for live intervals.

llvm-svn: 91859
 2009-12-22 00:11:50 +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
Chris Lattner a48f44d9ee improve portability to avoid conflicting with std::next in c++'0x. 
Patch by Howard Hinnant!

llvm-svn: 90365
 2009-12-03 00:50:42 +00:00