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12083 Commits

Author SHA1 Message Date
Jakob Stoklund Olesen
9f8104463f Replace a big gob of old coalescer logic with the new CoalescerPair class. 
CoalescerPair can determine if a copy can be coalesced, and which register gets
merged away. The old logic in SimpleRegisterCoalescing had evolved into
something a bit too convoluted.

This second attempt fixes some crashes that only occurred Linux.

llvm-svn: 106769
 2010-06-24 18:15:01 +00:00
Bob Wilson
2b2d62ad11 Edit and clarify comments for TargetInstrInfo methods: 
None of the existing implementations of commuteInstruction create new
instructions unless the NewMI parameter is true, but the comment had
implied otherwise.

findCommutedOpIndices returns false, not true, when it doesn't know
how to commute the instruction.

llvm-svn: 106761
 2010-06-24 16:48:26 +00:00
Dan Gohman
4f088f99fe Add a comment about a thread safety issue in Statistic.h. 
llvm-svn: 106756
 2010-06-24 16:31:32 +00:00
Dan Gohman
abeebe353c Add overloads for getFile and getFileOrSTDIN which take a const char * 
instead of a StringRef, avoiding the need to copy the string in the
common case.

llvm-svn: 106754
 2010-06-24 16:25:50 +00:00
Jakob Stoklund Olesen
f01eb3aab6 Be more strict about subreg-to-subreg copies in CoalescerPair. 
Also keep track of the original DstREg before subregister adjustments.

llvm-svn: 106753
 2010-06-24 16:19:28 +00:00
Dan Gohman
a08a9b8a0b Reapply r106634, now that the bug it exposed is fixed. 
llvm-svn: 106746
 2010-06-24 14:30:44 +00:00
Jakob Stoklund Olesen
1c9d50ed92 Revert "Replace a big gob of old coalescer logic with the new CoalescerPair class." 
Whiny buildbots.

llvm-svn: 106710
 2010-06-24 00:52:22 +00:00
Devang Patel
0c927a80fe Use ValueMap instead of DenseMap. 
The ValueMapper used by various cloning utility maps MDNodes also.

llvm-svn: 106706
 2010-06-24 00:33:28 +00:00
Jakob Stoklund Olesen
19abbf4387 Replace a big gob of old coalescer logic with the new CoalescerPair class. 
CoalescerPair can determine if a copy can be coalesced, and which register gets
merged away. The old logic in SimpleRegisterCoalescing had evolved into
something a bit too convoluted.

llvm-svn: 106701
 2010-06-24 00:12:39 +00:00
Devang Patel
373b10cbaa Cosmetic change. 
Do not use "ValueMap" as a name for a local variable or an argument.

llvm-svn: 106698
 2010-06-23 23:55:51 +00:00
Gabor Greif
4615fc1c93 minor enhancement to llvm::isFreeCall API: return CallInst; no functional change 
llvm-svn: 106686
 2010-06-23 21:51:12 +00:00
Daniel Dunbar
be50ef88bd Revert r106263, "Fold the ShrinkDemandedOps pass into the regular DAGCombiner pass,"... it was causing both 'file' (with clang) and 176.gcc (with llvm-gcc) to be miscompiled. 
llvm-svn: 106634
 2010-06-23 17:09:26 +00:00
Jim Grosbach
12afda541e Some targets don't require the fencing MEMBARRIER instructions surrounding 
atomic intrinsics, either because the use locking instructions for the
atomics, or because they perform the locking directly. Add support in the
DAG combiner to fold away the fences.

llvm-svn: 106630
 2010-06-23 16:07:42 +00:00
Jim Grosbach
395b0a671c remove trailing whitespace 
llvm-svn: 106628
 2010-06-23 15:49:18 +00:00
Dan Gohman
f44783ab4e Replace ScalarEvolution's private copy of getLoopPredecessor 
with LoopInfo's public copy.

llvm-svn: 106603
 2010-06-22 23:43:28 +00:00
Eric Christopher
835fc55fd0 Look for and use a different darwin crash reporter library. 
llvm-svn: 106576
 2010-06-22 21:01:04 +00:00
Dan Gohman
2303159bba Move PHIElimination's SplitCriticalEdge for MachineBasicBlocks out 
into a utility routine, teach it how to update MachineLoopInfo, and
make use of it in MachineLICM to split critical edges on demand.

llvm-svn: 106555
 2010-06-22 17:25:57 +00:00
Dan Gohman
29b845f3b7 Split out the code for finding a unique loop predecessor from 
getLoopPreheader into a separate function, for clients which don't
require a proper preheader.

llvm-svn: 106543
 2010-06-22 15:25:42 +00:00
Dan Gohman
5863f1e8c6 Add a comment explaining a non-obvious API. 
llvm-svn: 106539
 2010-06-22 13:57:08 +00:00
Devang Patel
f50b6147ad Use single interface, using twine, to get named metadata. 
getNamedMetadata().

llvm-svn: 106518
 2010-06-22 01:19:38 +00:00
Evan Cheng
a1ebf91a39 Tail merging pass shall not break up IT blocks. rdar://8115404 
llvm-svn: 106517
 2010-06-22 01:18:16 +00:00
Eric Christopher
68b77d45c2 Remove isTwoAddress from llvm. 
llvm-svn: 106470
 2010-06-21 20:35:09 +00:00
Dan Gohman
745765d0b8 Move several non-performance-critical member functinos out of line. 
llvm-svn: 106444
 2010-06-21 18:46:45 +00:00
Chris Lattner
42e833c9c4 make the Value constructor protected. 
llvm-svn: 106427
 2010-06-21 16:46:37 +00:00
Dan Gohman
fb091c213b Factor out duplicated code for reusing and inserting casts into 
a helper function.

llvm-svn: 106388
 2010-06-19 13:25:23 +00:00
Dan Gohman
823dff64cd Teach regular and fast isel to set dead flags on unused implicit defs 
on calls and similar instructions.

llvm-svn: 106353
 2010-06-18 23:28:01 +00:00
Evan Cheng
b5fadc47e0 Allow ARM if-converter to be run after post allocation scheduling. 
- This fixed a number of bugs in if-converter, tail merging, and post-allocation
  scheduler. If-converter now runs branch folding / tail merging first to
  maximize if-conversion opportunities.
- Also changed the t2IT instruction slightly. It now defines the ITSTATE
  register which is read by instructions in the IT block.
- Added Thumb2 specific hazard recognizer to ensure the scheduler doesn't
  change the instruction ordering in the IT block (since IT mask has been
  finalized). It also ensures no other instructions can be scheduled between
  instructions in the IT block.

This is not yet enabled.

llvm-svn: 106344
 2010-06-18 23:09:54 +00:00
Jim Grosbach
b8c94667a8 back-end libcall handling for ATOMIC_SWAP (__sync_lock_test_and_set) 
llvm-svn: 106342
 2010-06-18 23:03:10 +00:00
Jim Grosbach
91aae1c534 Add Expand-to-libcall support for additional atomics. This covers the usual 
entries used by llvm-gcc. *_[U]MIN and such can be added later if needed.

This enables the front ends to simplify handling of the atomic intrinsics by
removing the target-specific decision about which targets can handle the
intrinsics.

llvm-svn: 106321
 2010-06-18 21:43:38 +00:00
Dan Gohman
b5ec637e57 Revert r106304 (105548 and friends), which are the SCEVComplexityCompare 
optimizations. There is still some nondeterminism remaining.

llvm-svn: 106306
 2010-06-18 19:54:20 +00:00
Dan Gohman
527b570925 Reapply 105540, 105542, and 105548, and revert r105732. 
llvm-svn: 106304
 2010-06-18 19:26:04 +00:00
Dan Gohman
b220af45eb Add explicit keywords. 
llvm-svn: 106300
 2010-06-18 19:04:37 +00:00
Dan Gohman
1ccf40774e Start TargetRegisterClass indices at 0 instead of 1, so that 
MachineRegisterInfo doesn't have to confusingly allocate an extra
entry.

llvm-svn: 106296
 2010-06-18 18:13:55 +00:00
Jim Grosbach
60a3287950 Grammar. 
llvm-svn: 106292
 2010-06-18 17:40:42 +00:00
Dan Gohman
0422fad3a6 Don't bother calling releaseMemory before destroying the DominatorTreeBase. 
llvm-svn: 106287
 2010-06-18 16:09:11 +00:00
Dan Gohman
6c6e9a45ff Give NamedRegionTimer an Enabled flag, allowing all its clients to 
switch from this:

  if (TimePassesIsEnabled) {
    NamedRegionTimer T(Name, GroupName);
    do_something();
  } else {
    do_something(); // duplicate the code, this time without a timer!
  }

to this:

  {
    NamedRegionTimer T(Name, GroupName, TimePassesIsEnabled);
    do_something();
  }

llvm-svn: 106285
 2010-06-18 15:56:31 +00:00
Dan Gohman
e9dfb84007 Change UpdateNodeOperands' operand and return value from SDValue to 
SDNode *, since it doesn't care about the ResNo value.

llvm-svn: 106282
 2010-06-18 15:30:29 +00:00
Dan Gohman
e20e668c7e Remove getIntegerSCEV; it's redundant with getConstant, and getConstant 
is more consistent with the ConstantInt API.

llvm-svn: 106281
 2010-06-18 14:33:50 +00:00
Dan Gohman
0b5b93b20d Eliminate unnecessary uses of getZExtValue(). 
llvm-svn: 106279
 2010-06-18 14:22:04 +00:00
Dan Gohman
22ff84372b isValueValidForType can be a static member function. 
llvm-svn: 106278
 2010-06-18 14:01:07 +00:00
Dan Gohman
8185674354 Fold the ShrinkDemandedOps pass into the regular DAGCombiner pass, 
which is faster, simpler, and less surprising.

llvm-svn: 106263
 2010-06-18 01:05:21 +00:00
Stuart Hastings
bd7194d21c Add a DebugLoc parameter to TargetInstrInfo::InsertBranch(). This 
addresses a longstanding deficiency noted in many FIXMEs scattered
across all the targets.

This effectively moves the problem up one level, replacing eleven
FIXMEs in the targets with eight FIXMEs in CodeGen, plus one path
through FastISel where we actually supply a DebugLoc, fixing Radar
7421831.

llvm-svn: 106243
 2010-06-17 22:43:56 +00:00
Jason Molenda
830bbc15f4 Add the entire range of DW_OP_lit[0..31], DW_OP_reg[0..31], and 
DW_OP_breg[0..31] to Dwarf.h.

Add "DW_" prefix to the llvm::dwarf::*String methods which did not
already have them in Dwarf.cpp.

llvm-svn: 106197
 2010-06-17 01:23:24 +00:00
Douglas Gregor
48c6838611 Revert r106117, which was the result of me misreading the C++98/03 
specification.

llvm-svn: 106162
 2010-06-16 22:32:18 +00:00
Daniel Dunbar
2c6d6693e2 MC: Simplify MCAssembler::isSymbolLinkerVisible to only take an MCSymbol. 
llvm-svn: 106142
 2010-06-16 20:04:29 +00:00
Daniel Dunbar
7631ddfec4 MC: Lift SwitchSection() and Finish() into MCObjectStreamer. 
llvm-svn: 106141
 2010-06-16 20:04:25 +00:00
Daniel Dunbar
d52ca1c3e5 MC: Factor out an MCObjectStreamer class, which will be shared by the concrete 
object file format writers.

llvm-svn: 106140
 2010-06-16 20:04:22 +00:00
Douglas Gregor
5ca7ded45a Eliminate a redundant "typename" keyword 
llvm-svn: 106117
 2010-06-16 17:42:01 +00:00
Devang Patel
3282324020 Use separate named MDNode to hold each function's local variable info. 
This speeds up local variable handling in DwarfDebug.

llvm-svn: 106075
 2010-06-16 00:53:55 +00:00
Jakob Stoklund Olesen
7fe0620525 Remove the local register allocator. 
Please use the fast allocator instead.

llvm-svn: 106051
 2010-06-15 21:58:33 +00:00