Commit Graph

159 Commits

Author SHA1 Message Date
255f89faee Sort the #include lines for the include/... tree with the script.
AKA: Recompile *ALL* the source code!

This one went much better. No manual edits here. I spot-checked for
silliness and grep-checked for really broken edits and everything seemed
good. It all still compiles. Yell if you see something that looks goofy.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169133 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-03 17:02:12 +00:00
c4f70d437d Add a function computeRegisterLiveness() to MachineBasicBlock. This uses analyzePhysReg() from r163694 to heuristically try and determine the liveness state of a physical register upon arrival at a particular instruction in a block.
The search for liveness is clipped to a specific number of instructions around the target MachineInstr, in order to avoid degenerating into an O(N^2) algorithm. It tries to use various clues about how instructions around (both before and after) a given MachineInstr use that register, to determine its state at the MachineInstr.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@163695 91177308-0d34-0410-b5e6-96231b3b80d8
2012-09-12 10:18:23 +00:00
990ca5517f Fix a quadratic algorithm in MachineBranchProbabilityInfo.
The getSumForBlock function was quadratic in the number of successors
because getSuccWeight would perform a linear search for an already known
iterator.

This patch was originally committed as r161460, but reverted again
because of assertion failures. Now that duplicate Machine CFG edges have
been eliminated, this works properly.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@162233 91177308-0d34-0410-b5e6-96231b3b80d8
2012-08-20 22:01:38 +00:00
2c5a960b0e Clarify that duplicate edges are not allowed in the Machine CFG.
LLVM IR has labeled duplicate CFG edges, but since Machine CFG edges
don't have labels, it doesn't make sense to allow duplicates. There is
no way of telling what the edges mean.

Duplicate CFG edges cause confusion when dealing with edge weights. It
seems that code producing duplicate CFG edges usually does the wrong
thing with edge weights.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@162227 91177308-0d34-0410-b5e6-96231b3b80d8
2012-08-20 21:05:58 +00:00
913ff09a9a Revert "Fix a quadratic algorithm in MachineBranchProbabilityInfo."
It caused an assertion failure when compiling consumer-typeset.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161463 91177308-0d34-0410-b5e6-96231b3b80d8
2012-08-08 01:10:31 +00:00
5e63d43e48 Fix a quadratic algorithm in MachineBranchProbabilityInfo.
The getSumForBlock function was quadratic in the number of successors
because getSuccWeight would perform a linear search for an already known
iterator.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161460 91177308-0d34-0410-b5e6-96231b3b80d8
2012-08-08 00:20:37 +00:00
f192b507a3 Add MachineBasicBlock::isPredecessor().
A->isPredecessor(B) is the same as B->isSuccessor(A), but it can
tolerate a B that is null or dangling. This shouldn't happen normally,
but it it useful for verification code.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@160968 91177308-0d34-0410-b5e6-96231b3b80d8
2012-07-30 17:36:47 +00:00
20aedcdfa3 Fix a problem with the reverse bundle iterators.
This showed up the first time rend() was called on a bundled instruction
in the Mips backend.

Also avoid dereferencing end() in bundle_iterator::operator++().

We still don't have a place to put unit tests for this stuff.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@158310 91177308-0d34-0410-b5e6-96231b3b80d8
2012-06-11 15:11:12 +00:00
d4786e221c Allow converting MachineBasicBlock::iterator to const_iterator.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@155225 91177308-0d34-0410-b5e6-96231b3b80d8
2012-04-20 20:05:19 +00:00
8ceaa660bf Added MachineBasicBlock::getFullName() to standardize/factor codegen diagnostics.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@152176 91177308-0d34-0410-b5e6-96231b3b80d8
2012-03-07 00:18:18 +00:00
30e98a03a3 Move the operand iterator into MachineInstrBundle.h where it belongs.
Extract a base class and provide four specific sub-classes for iterating
over const/non-const bundles/instructions.

This eliminates the mystery bool constructor argument.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@151684 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-29 00:33:41 +00:00
62c4d9799f Add a MachineOperand iterator class.
The MIOperands iterator can visit operands on a single instruction, or
all operands in a bundle.  This simplifies code like the register
allocator that treats bundles as a set of operands.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@151529 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-27 18:09:36 +00:00
57cae881e2 Tidy up. Trailing whitespace.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@149408 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-31 19:47:32 +00:00
25101bb2a7 Add some constantness to BranchProbabilityInfo and BlockFrequnencyInfo.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@146986 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-20 20:03:10 +00:00
b5e8b8c8f7 fix typo
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@146940 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-20 01:11:37 +00:00
ddfd1377d2 - Add MachineInstrBundle.h and MachineInstrBundle.cpp. This includes a function
to finalize MI bundles (i.e. add BUNDLE instruction and computing register def
  and use lists of the BUNDLE instruction) and a pass to unpack bundles.
- Teach more of MachineBasic and MachineInstr methods to be bundle aware.
- Switch Thumb2 IT block to MI bundles and delete the hazard recognizer hack to
  prevent IT blocks from being broken apart.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@146542 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-14 02:11:42 +00:00
7c2a4a30e0 First chunk of MachineInstr bundle support.
1. Added opcode BUNDLE
2. Taught MachineInstr class to deal with bundled MIs
3. Changed MachineBasicBlock iterator to skip over bundled MIs; added an iterator to walk all the MIs
4. Taught MachineBasicBlock methods about bundled MIs


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@145975 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-06 22:12:01 +00:00
8c741b8064 Use logarithmic units for basic block alignment.
This was actually a bit of a mess. TLI.setPrefLoopAlignment was clearly
documented as taking log2(bytes) units, but the x86 target would still
set a preferred loop alignment of '16'.

CodePlacementOpt passed this number on to the basic block, and
AsmPrinter interpreted it as bytes.

Now both MachineFunction and MachineBasicBlock use logarithmic
alignments.

Obviously, MachineConstantPool still measures alignments in bytes, so we
can emulate the thrill of using as.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@145889 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-06 01:26:19 +00:00
fbf5f1b72b Add a bool value to set the IsLandingPad flag to.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@141435 91177308-0d34-0410-b5e6-96231b3b80d8
2011-10-07 23:06:01 +00:00
7cc2b07437 Introduce MachineBranchProbabilityInfo class, which has similar API to
BranchProbabilityInfo (expect setEdgeWeight which is not available here).
Branch Weights are kept in MachineBasicBlocks. To turn off this analysis
set -use-mbpi=false.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133184 91177308-0d34-0410-b5e6-96231b3b80d8
2011-06-16 20:22:37 +00:00
1a7744501a Cache the fairly expensive last split point computation and provide a fast
inlined path for the common case.

Most basic blocks don't contain a call that may throw, so the last split point
os simply the first terminator.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128874 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-05 04:20:27 +00:00
adb877d62e Collect and coalesce DBG_VALUE instructions before emitting the function.
Correctly terminate the range of register DBG_VALUEs when the register is
clobbered or when the basic block ends.

The code is now ready to deal with variables that are sometimes in a register
and sometimes on the stack. We just need to teach emitDebugLoc to say 'stack
slot'.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128327 91177308-0d34-0410-b5e6-96231b3b80d8
2011-03-26 02:19:36 +00:00
13ba2dab63 Use an IndexedMap instead of a DenseMap for the live-out cache.
This speeds up updateSSA() so it only accounts for 5% of the live range
splitting time.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126972 91177308-0d34-0410-b5e6-96231b3b80d8
2011-03-04 00:15:36 +00:00
cb6404711b Add LiveIntervals::getLastSplitPoint().
A live range cannot be split everywhere in a basic block. A split must go before
the first terminator, and if the variable is live into a landing pad, the split
must happen before the call that can throw.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124894 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-04 19:33:11 +00:00
4f28c1c714 Teach frame lowering to ignore debug values after the terminators.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123399 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-13 21:28:52 +00:00
92095e7b3f Add SkipPHIsAndLabels from PHIElimination to MachineBasicBlock. It is needed
elsewhere.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117763 91177308-0d34-0410-b5e6-96231b3b80d8
2010-10-30 01:26:14 +00:00
f4a1e1a69f Teach MachineBasicBlock::print() to annotate instructions and blocks with
SlotIndexes when available.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117392 91177308-0d34-0410-b5e6-96231b3b80d8
2010-10-26 20:21:46 +00:00
704b07613e Add insertAfter. This should have accompanied previous check-in.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@114481 91177308-0d34-0410-b5e6-96231b3b80d8
2010-09-21 21:10:42 +00:00
d463a74464 Add a getFirstNonPHI utility function.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107778 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-07 14:33:51 +00:00
14152b480d Reapply r107655 with fixes; insert the pseudo instruction into
the block before calling the expansion hook. And don't
put EFLAGS in a mbb's live-in list twice.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107691 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-06 20:24:04 +00:00
258c58cc62 Revert r107655.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107668 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-06 15:49:48 +00:00
b81c771c0d Fix a bunch of custom-inserter functions to handle the case where
the pseudo instruction is not at the end of the block.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107655 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-06 15:18:19 +00:00
853d3fb8d2 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106555 91177308-0d34-0410-b5e6-96231b3b80d8
2010-06-22 17:25:57 +00:00
81bf03eb5c Eliminate MachineBasicBlock::const_livein_iterator and make
MachineBasicBlock::livein_iterator a const_iterator, because
clients shouldn't ever be using the iterator interface to
mutate the livein set.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101147 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-13 16:57:55 +00:00
1b2eb0e8a6 eliminate the now-unneeded context argument of MBB::getSymbol()
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98451 91177308-0d34-0410-b5e6-96231b3b80d8
2010-03-13 21:04:28 +00:00
0a3f39985b move isOnlyReachableByFallthrough out of MachineBasicBlock into AsmPrinter,
and add a sparc implementation that knows about delay slots.  Patch by
Nathan Keynes!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96492 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-17 18:52:56 +00:00
a655f088b8 Stop MachineInstr.h from #including AsmPrinter.h
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@95741 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-10 01:04:16 +00:00
3b1906f48d more comment updates
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@95736 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-10 00:44:23 +00:00
f71cb015c1 add a new MachineBasicBlock::getSymbol method, replacing
the AsmPrinter::GetMBBSymbol.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@94515 91177308-0d34-0410-b5e6-96231b3b80d8
2010-01-26 04:55:51 +00:00
73e884bb3e make findDebugLoc a class method
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@94032 91177308-0d34-0410-b5e6-96231b3b80d8
2010-01-20 21:36:02 +00:00
918f0f0bea Move findDebugLoc somewhere more central. Fix
more cases where debug declarations affect
debug line info.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93953 91177308-0d34-0410-b5e6-96231b3b80d8
2010-01-20 00:19:24 +00:00
43cf6c3939 Revert these. They may have been causing 483_xalancbmk to fail:
$ svn merge -c -91161 https://llvm.org/svn/llvm-project/llvm/trunk
--- Reverse-merging r91161 into '.':
U    lib/CodeGen/BranchFolding.cpp
U    lib/CodeGen/MachineBasicBlock.cpp
$ svn merge -c -91113 https://llvm.org/svn/llvm-project/llvm/trunk
--- Reverse-merging r91113 into '.':
G    lib/CodeGen/MachineBasicBlock.cpp
$ svn merge -c -91101 https://llvm.org/svn/llvm-project/llvm/trunk
--- Reverse-merging r91101 into '.':
U    include/llvm/CodeGen/MachineBasicBlock.h
G    lib/CodeGen/MachineBasicBlock.cpp
$ svn merge -c -91092 https://llvm.org/svn/llvm-project/llvm/trunk
--- Reverse-merging r91092 into '.':
G    include/llvm/CodeGen/MachineBasicBlock.h
G    lib/CodeGen/MachineBasicBlock.cpp



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@91376 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-15 00:39:24 +00:00
64bdde2093 Address comments on last patch:
- Loosen the restrictions when checking of it branches to a landing pad.
- Make the loop more efficient by checking the '.insert' return value.
- Do cheaper checks first.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@91101 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-11 03:14:18 +00:00
4bde1ab82d A machine basic block may end in an unconditional branch, however it may have
more than one successor. Normally, these extra successors are dead. However,
some of them may branch to exception handling landing pads. If we remove those
successors, then the landing pads could go away if all predecessors to it are
removed. Before, it was checking if the direct successor was the landing
pad. But it could be the result of jumping through multiple basic blocks to get
to it. If we were to only check for the existence of an EH_LABEL in the basic
block and not remove successors if it's in there, then it could stop actually
dead basic blocks from being removed.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@91092 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-11 01:49:14 +00:00
15acadde5f Split tail duplication into a separate pass. This is needed to avoid
running tail duplication when doing branch folding for if-conversion, and
we also want to be able to run tail duplication earlier to fix some
reg alloc problems.  Move the CanFallThrough function from BranchFolding
to MachineBasicBlock so that it can be shared by TailDuplication.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89904 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-26 00:32:21 +00:00
324da7647c Add MachineBasicBlock::getName, and use it in place of getBasicBlock()->getName.
Fix debug code that assumes getBasicBlock never returns NULL.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89428 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-20 01:17:03 +00:00
2a085c3493 Add a WriteAsOperand for MachineBasicBlock so MachineLoopInfo dump looks sane.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89130 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-17 19:19:59 +00:00
7707a0df5b Move the utility function UpdateTerminator() from CodePlacementOpt() into
MachineBasicBlock so other passes can utilize it.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86947 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-12 03:55:33 +00:00
1edb8e0910 Fix a comment.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86558 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-09 17:06:51 +00:00
8c2b52552c Initial target-independent CodeGen support for BlockAddresses.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85556 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-30 01:27:03 +00:00