Reverted patch 44199:

http://llvm.org/viewvc/llvm-project?rev=44199&view=rev

This patch completely broke serialization due to an invariant I assumed but
did not hold. The assumed invariant was that all pointer IDs emitted by a call
to BatchEmitOwnedPtrs would be consecutive. This is only the case if there has
been no forward references to an owned pointer (and hence already registered
with the Serializer object).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44203 91177308-0d34-0410-b5e6-96231b3b80d8

Remove indeterminism from a loop.  We think this will
fix an occasional nonrepeatable bootstrap failure we've
been seeing on Darwin.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44202 91177308-0d34-0410-b5e6-96231b3b80d8

Fix denormal check in float->APInt conversion.
PR 1804.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44201 91177308-0d34-0410-b5e6-96231b3b80d8

Changed implementation of Serialize::EmitDiffPtrID and
Deserialize::ReadDiffPtrID to read and emit bools instead of unsigned
integers. This should result in a nice space optimization once we have
"auto-abbreviation" generation in place.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44200 91177308-0d34-0410-b5e6-96231b3b80d8

Implemented optimization for BatchEmitOwnedPtrs that we only emit one complete
SerializedPtrID, followed by the *differences* in IDs. The big idea is that
most IDs will be just be 1 off from the previous (either that or NULL, which
we encode as a difference if 0), so this will greatly reduce the encoding
space for extra IDs to just 1 bit per pointer.

So far this optimization reduces serialization of Carbon.h by only 1%, but
we aren't using any abbreviations now in the Bitcode file to properly take
advantage of this optimization.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44199 91177308-0d34-0410-b5e6-96231b3b80d8

Live interval splitting:

When a live interval is being spilled, rather than creating short, non-spillable
intervals for every def / use, split the interval at BB boundaries. That is, for
every BB where the live interval is defined or used, create a new interval that
covers all the defs and uses in the BB.

This is designed to eliminate one common problem: multiple reloads of the same
value in a single basic block. Note, it does *not* decrease the number of spills
since no copies are inserted so the split intervals are *connected* through
spill and reloads (or rematerialization). The newly created intervals can be
spilled again, in that case, since it does not span multiple basic blocks, it's
spilled in the usual manner. However, it can reuse the same stack slot as the
previously split interval.

This is currently controlled by -split-intervals-at-bb.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44198 91177308-0d34-0410-b5e6-96231b3b80d8

Shrinkfy.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44197 91177308-0d34-0410-b5e6-96231b3b80d8

Typo.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44196 91177308-0d34-0410-b5e6-96231b3b80d8

Testcase from PR 1508 (although its's somewhat
orthogonal to the main problem there)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44194 91177308-0d34-0410-b5e6-96231b3b80d8

Fix for PR1801

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44193 91177308-0d34-0410-b5e6-96231b3b80d8

These were implemented

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44189 91177308-0d34-0410-b5e6-96231b3b80d8

Fix PR1800 by correcting mistaken logic.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44188 91177308-0d34-0410-b5e6-96231b3b80d8

fix a typo

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44187 91177308-0d34-0410-b5e6-96231b3b80d8

Implement codegen for flt_rounds on x86

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44183 91177308-0d34-0410-b5e6-96231b3b80d8

Implement necessary bits for flt_rounds gcc builtin.
Codegen bits and llvm-gcc support will follow.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44182 91177308-0d34-0410-b5e6-96231b3b80d8

Basic non-power-of-2 vector support

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44181 91177308-0d34-0410-b5e6-96231b3b80d8

Reverted r44163 per request

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44177 91177308-0d34-0410-b5e6-96231b3b80d8

Fix bugs in iterator invalidation

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44174 91177308-0d34-0410-b5e6-96231b3b80d8

This assertion was bogus.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44167 91177308-0d34-0410-b5e6-96231b3b80d8

Fix a thinko in post-allocation coalescer.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44166 91177308-0d34-0410-b5e6-96231b3b80d8

Fix handling of overflow in loop calculation by adding new UDiv SCEV. This SCEV
is disabled in the sense that it will refuse to create one from a UDiv
instruction, until the code is better tested.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44163 91177308-0d34-0410-b5e6-96231b3b80d8

Fix PR1788 by taking the approach suggested by Richard Smith.
Thanks to him for his detailed analysis of the problem.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44162 91177308-0d34-0410-b5e6-96231b3b80d8

Import the boost scoped_ptr class to LLVM.  This patch was prepared by
Cédric Venet.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44161 91177308-0d34-0410-b5e6-96231b3b80d8

More templatization.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44158 91177308-0d34-0410-b5e6-96231b3b80d8

many edits, patch by Kelly Wilson!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44157 91177308-0d34-0410-b5e6-96231b3b80d8

Adding debug output during coalescing.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44154 91177308-0d34-0410-b5e6-96231b3b80d8

Need to increment the iterator.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44153 91177308-0d34-0410-b5e6-96231b3b80d8

Fixed serious bug in BatchReadOwnedPtrs where in a chain of calls to
deserialize objects if BatchReadOwnedPtrs was called more than once in the
same call chain then the second call would overwrite the SerializedPtrIDs
being used by the first call. Solved this problem by making the vector that
holds the pointer IDs local to a function call. Now BatchReadOwnedPtrs is
reentrant.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44152 91177308-0d34-0410-b5e6-96231b3b80d8

I discover array_lengthof, thanks to gabor on #llvm.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44139 91177308-0d34-0410-b5e6-96231b3b80d8

Tweak the descriptions of the new 'const' and 'pure' attributes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44132 91177308-0d34-0410-b5e6-96231b3b80d8

Oops. Debugging code shouldn't have been checked in.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44128 91177308-0d34-0410-b5e6-96231b3b80d8

Removed debug #define that was accidentally checked in while debugging
the deserializer.

Fixed assertion when "stream jumping" in the deserializer to properly function
when we have reached the end of the stream.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44124 91177308-0d34-0410-b5e6-96231b3b80d8

Simplify the attribute verification code.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44116 91177308-0d34-0410-b5e6-96231b3b80d8

Un XFAIL these tests, now that Bill has backported
the fix from 4.2.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44115 91177308-0d34-0410-b5e6-96231b3b80d8

Document pure/const parameter attributes

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44111 91177308-0d34-0410-b5e6-96231b3b80d8

Regenerate

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44110 91177308-0d34-0410-b5e6-96231b3b80d8

Add pure/const attributes. Documentation will follow.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44109 91177308-0d34-0410-b5e6-96231b3b80d8

Fix PIC jump table codegen on x86-32/linux. In fact, such thing should be applied
to all targets uses GOT-relative offsets for PIC (Alpha?)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44108 91177308-0d34-0410-b5e6-96231b3b80d8

Eliminate the recently introduced CCAssignToStackABISizeAlign
in favour of teaching CCAssignToStack that size 0 and/or align
0 means to use the ABI values.  This seems a neater solution.
It is safe since no legal value type has size 0.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44107 91177308-0d34-0410-b5e6-96231b3b80d8

Added two new overloaded versions of BatchEmitOwnedPtrs and
BatchReadOwnedPtrs.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44105 91177308-0d34-0410-b5e6-96231b3b80d8

Clean up sub-register implementation by moving subReg information back to
MachineOperand auxInfo. Previous clunky implementation uses an external map
to track sub-register uses. That works because register allocator uses
a new virtual register for each spilled use. With interval splitting (coming
soon), we may have multiple uses of the same register some of which are
of using different sub-registers from others. It's too fragile to constantly
update the information.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44104 91177308-0d34-0410-b5e6-96231b3b80d8

XFAIL these tests until the fix gets backported
from llvm-gcc-4.2 to 4.0.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44103 91177308-0d34-0410-b5e6-96231b3b80d8

Document a limitation, patch contributed by George Russell

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44102 91177308-0d34-0410-b5e6-96231b3b80d8

Allow the block extractor take to take a list of basic blocks to not extract
from a file containing Function/BasicBlock pairings. This is not safe against
anonymous or abnormally-named Funcs or BBs.

Make bugpoint use this interface to pass the BBs list to the child bugpoint.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44101 91177308-0d34-0410-b5e6-96231b3b80d8

Implement PR1796 and Transforms/SimplifyCFG/noreturn-call.ll
by inserting unreachable after no-return calls.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44099 91177308-0d34-0410-b5e6-96231b3b80d8

Start the process of making MachineLoopInfo possible by templating Loop.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44097 91177308-0d34-0410-b5e6-96231b3b80d8

Fixed a compilation error.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44083 91177308-0d34-0410-b5e6-96231b3b80d8

Fixed a strange construct. Please review.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44082 91177308-0d34-0410-b5e6-96231b3b80d8

Updated VC++ build system

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44081 91177308-0d34-0410-b5e6-96231b3b80d8

Fix the regression on Transforms/GlobalOpt/deadglobal-2.ll from my
patch on friday.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44068 91177308-0d34-0410-b5e6-96231b3b80d8

upgrade test

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44067 91177308-0d34-0410-b5e6-96231b3b80d8

Run computeDomForest() on the set of registers that need to be tested for
interference.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44064 91177308-0d34-0410-b5e6-96231b3b80d8

Preserve LiveVariables when doing critical edge splitting.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44063 91177308-0d34-0410-b5e6-96231b3b80d8

Wow.  I definitely shouldn't write code when I'm tird.

Make my previous patch actually do what it was intended to do.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44061 91177308-0d34-0410-b5e6-96231b3b80d8

Revert previous; these files aren't ready to go in yet.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44057 91177308-0d34-0410-b5e6-96231b3b80d8

Add parameter to getDwarfRegNum to permit targets
to use different mappings for EH and debug info;
no functional change yet.
Fix warning in X86CodeEmitter.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44056 91177308-0d34-0410-b5e6-96231b3b80d8

Make llvm2cpp better, patch for PR1794, contributed by Zack Rusin.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44051 91177308-0d34-0410-b5e6-96231b3b80d8

Fix x86-64 jit: remove reliance on Dwarf numbers.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44048 91177308-0d34-0410-b5e6-96231b3b80d8

Unifacalize the CALLSEQ{START,END} stuff.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44045 91177308-0d34-0410-b5e6-96231b3b80d8

Implement PR1786 by iterating between dead cycle elimination
and simplifycfg in the rare cases when it is needed.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44044 91177308-0d34-0410-b5e6-96231b3b80d8

Many typos, grammaro, and wording fixes.  Patch by
Kelly Wilson, thanks!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44043 91177308-0d34-0410-b5e6-96231b3b80d8

Unify CALLSEQ_{START,END}. They take 4 parameters: the chain, two stack
adjustment fields, and an optional flag. If there is a "dynamic_stackalloc" in
the code, make sure that it's bracketed by CALLSEQ_START and CALLSEQ_END. If
not, then there is the potential for the stack to be changed while the stack's
being used by another instruction (like a call).

This can only result in tears...

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44037 91177308-0d34-0410-b5e6-96231b3b80d8

Renamed serialization method "Materialize" to "Create".  This is an API change.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44034 91177308-0d34-0410-b5e6-96231b3b80d8

Fixed bug with inconsistent serialization/deserialization in matching
calls to BatchEmitOwnedPtrs and BatchReadOwnedPtrs.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44032 91177308-0d34-0410-b5e6-96231b3b80d8

Move SYSCTL stuff close to where it's used.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44031 91177308-0d34-0410-b5e6-96231b3b80d8

Build universal llvm.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44030 91177308-0d34-0410-b5e6-96231b3b80d8

Completely forgot, that we have some debug information emission on PPC. This should fix
some regressions on ppc nightly tests.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44029 91177308-0d34-0410-b5e6-96231b3b80d8

Added JumpTable support
Fixed some AsmPrinter issues
Added GLOBAL_OFFSET_TABLE Node handle.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44024 91177308-0d34-0410-b5e6-96231b3b80d8

Added versions of ReadPtr that takes an explicit SerializedPtrID.  This allows
clients of the Deserializer to read the pointer ID before they are ready
to deserialize the object (which can mean registering a pointer reference
with the backpatcher).

Changed some methods that took an argument "SerializedPtrID" to "const SerializedPtrID&" (pass-by-reference).  This is to accommodate a future
revision of SerializedPtrID where it may be much fatter than an unsigned
integer.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44021 91177308-0d34-0410-b5e6-96231b3b80d8

Break critical edges coming into blocks with PHI nodes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44019 91177308-0d34-0410-b5e6-96231b3b80d8

Typo fix in the tutorial.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44014 91177308-0d34-0410-b5e6-96231b3b80d8

Compile fix.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44013 91177308-0d34-0410-b5e6-96231b3b80d8

Add a flag for indirect branch instructions.

Target maintainers: please check that the instructions for your target are correctly marked.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44012 91177308-0d34-0410-b5e6-96231b3b80d8

Refactor some code.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44010 91177308-0d34-0410-b5e6-96231b3b80d8

Fix rewriting of PHI nodes.

Could someone more familiar with machine-level stuff review this for me?

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44005 91177308-0d34-0410-b5e6-96231b3b80d8

Updated VC++ build system

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44004 91177308-0d34-0410-b5e6-96231b3b80d8

Remove unnecessary #include's.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44003 91177308-0d34-0410-b5e6-96231b3b80d8

As Chris and Evan pointed out, BreakCriticalMachineEdges doesn't really need
to be a pass of its own.  Instead, move it out into a helper method.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44002 91177308-0d34-0410-b5e6-96231b3b80d8

Fix on 64-bit machines.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44001 91177308-0d34-0410-b5e6-96231b3b80d8

Clarify the meaning of '-2' register number

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43998 91177308-0d34-0410-b5e6-96231b3b80d8

Use TableGen to emit information for dwarf register numbers.
This makes DwarfRegNum to accept list of numbers instead.
Added three different "flavours", but only slightly tested on x86-32/linux.
Please check another subtargets if possible,

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43997 91177308-0d34-0410-b5e6-96231b3b80d8

Add convenient helper to obtain list of ints

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43993 91177308-0d34-0410-b5e6-96231b3b80d8

Add CCAssignToStackABISizeAlign for convenience in
dealing with types whose size & alignment are
different on different subtargets.  Use it for x86 f80.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43988 91177308-0d34-0410-b5e6-96231b3b80d8

Fixed a bug introduced by my last patch.  Now we properly clear out the BatchIDVec
vector before reusing it.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43984 91177308-0d34-0410-b5e6-96231b3b80d8

Fixed hack in BatchReadOwnedPtrs to no longer use the array of pointers passed in for
deserialization as a temporary location for storing serialized pointer identifiers. The
definition of SerializedPtrID will likely change significantly in the future, and the
current implementation caused compilation errors on some 64-bit machines.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43983 91177308-0d34-0410-b5e6-96231b3b80d8

Updated method signature to conform with the typedef in the method prototype.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43982 91177308-0d34-0410-b5e6-96231b3b80d8

Update tailcall code to include inline attribute operand for memcpy.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43978 91177308-0d34-0410-b5e6-96231b3b80d8

Added "random access" to the Deserializer to allow a client to jump to any
serialized block in the bitstream, including a block in an entirely different
nesting than the current block. This is useful for deserializing objects from
a bitstream in an order different from the order that they were serialized.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43973 91177308-0d34-0410-b5e6-96231b3b80d8

Made Deserializer a friend class of BitstreamReader.

Moved some of the logic in BitstreamReader::ExitBlock into a utility function
BitstreamReader::PopBlockScope. The latter is a private method. It will also
be called by Deserializer to manipulate the current "block scope."

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43972 91177308-0d34-0410-b5e6-96231b3b80d8

Added -test-opts to specify test options.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43971 91177308-0d34-0410-b5e6-96231b3b80d8

Update links.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43964 91177308-0d34-0410-b5e6-96231b3b80d8

Fix tests.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43961 91177308-0d34-0410-b5e6-96231b3b80d8

Fixed a strange construct. Please review.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43960 91177308-0d34-0410-b5e6-96231b3b80d8

Updated VC++ build system

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43959 91177308-0d34-0410-b5e6-96231b3b80d8

try again

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43956 91177308-0d34-0410-b5e6-96231b3b80d8

Unbreak x86-64 jumptable.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43955 91177308-0d34-0410-b5e6-96231b3b80d8

Silence a warning

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43954 91177308-0d34-0410-b5e6-96231b3b80d8

Revert previous rewrite per chris's comments.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43950 91177308-0d34-0410-b5e6-96231b3b80d8

Tighten up a check for folding away loads from (newly constant) globals.  This
fixes a crash on Transforms/GlobalOpt/2007-11-09-GEP-GEP-Crash.ll and
rdar://5585488.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43949 91177308-0d34-0410-b5e6-96231b3b80d8

Thanks to the XTARGET line, this test should still
be run on darwin, but I have no way of checking...

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43945 91177308-0d34-0410-b5e6-96231b3b80d8