Make the verifier reject instructions which have null pointers
for operands: rdar://6179606.  no testcase, because I can't write
a .ll file that is this broken ;-)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55460 91177308-0d34-0410-b5e6-96231b3b80d8

Clear the intervals list in "destroy", patch by
Prakash Prabhu!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55458 91177308-0d34-0410-b5e6-96231b3b80d8

Split the ATOMIC NodeType's to include the size, e.g.
ATOMIC_LOAD_ADD_{8,16,32,64} instead of ATOMIC_LOAD_ADD.
Increased the Hardcoded Constant OpActionsCapacity to match.
Large but boring; no functional change.

This is to support partial-word atomics on ppc; i8 is
not a valid type there, so by the time we get to lowering, the
ATOMIC_LOAD nodes looks the same whether the type was i8 or i32.
The information can be added to the AtomicSDNode, but that is the
largest SDNode; I don't fully understand the SDNode allocation,
but it is sensitive to the largest node size, so increasing
that must be bad.  This is the alternative.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55457 91177308-0d34-0410-b5e6-96231b3b80d8

This test crashes on non-x86 host; make SSE explicit.
Feel free to fix a better way!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55456 91177308-0d34-0410-b5e6-96231b3b80d8

Fix a missing #include. Patch by Andrew John Hughes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55451 91177308-0d34-0410-b5e6-96231b3b80d8

Reorganize the lifetimes of the major objects SelectionDAGISel
works with.

SelectionDAG, FunctionLoweringInfo, and SelectionDAGLowering
objects now get created once per SelectionDAGISel instance, and
can be reused across blocks and across functions. Previously,
they were created and destroyed each time they were needed.

This reorganization simplifies the handling of PHI nodes, and
also SwitchCases, JumpTables, and BitTestBlocks. This
simplification has the side effect of fixing a bug in FastISel
where successor PHI nodes weren't being updated correctly.

This is also a step towards making the transition from FastISel
into and out of SelectionDAG faster, and also making
plain SelectionDAG faster on code with lots of little blocks.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55450 91177308-0d34-0410-b5e6-96231b3b80d8

Add a helper method that will be used to support EXTRACT_SUBREG for selecting trunc's in fast-isel.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55439 91177308-0d34-0410-b5e6-96231b3b80d8

Make "movdq2q" and "movq2dq" dependent upon having SSE2 because they use the
SSE2 registers as well as the MMX registers.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55436 91177308-0d34-0410-b5e6-96231b3b80d8

Put file scoped constants in an anonymous namespace. Use the "using namespace
llvm" for consistency.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55435 91177308-0d34-0410-b5e6-96231b3b80d8

Move the check whether it's worth remating to caller.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55434 91177308-0d34-0410-b5e6-96231b3b80d8

Do not apply the transformation if the target does not support DestTy natively.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55433 91177308-0d34-0410-b5e6-96231b3b80d8

Backout 55429

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55432 91177308-0d34-0410-b5e6-96231b3b80d8

Fix FastISel's bitcast code for the case where getRegForValue fails.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55431 91177308-0d34-0410-b5e6-96231b3b80d8

Refactor isSafeToReMat out of 2addr pass.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55430 91177308-0d34-0410-b5e6-96231b3b80d8

Add facility to create a target.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55429 91177308-0d34-0410-b5e6-96231b3b80d8

Use TargetLowering to get the types in fast isel, which handles pointer types correctly for our purposes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55428 91177308-0d34-0410-b5e6-96231b3b80d8

Don't check TLI.getOperationAction. The FastISel way is to
just try to do the action and let the tablegen-generated code
determine if there is target-support for an operation.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55427 91177308-0d34-0410-b5e6-96231b3b80d8

Add a new FastISel method, getRegForValue, which takes care of
the details of materializing constants and other values into
registers, and make use of it in several places.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55426 91177308-0d34-0410-b5e6-96231b3b80d8

Add a comment about the current floating-point constant code in FastISel.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55425 91177308-0d34-0410-b5e6-96231b3b80d8

Fix typos and whitespaces. Other cosmetic changes based on feedback.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55424 91177308-0d34-0410-b5e6-96231b3b80d8

Minor cleanup.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55423 91177308-0d34-0410-b5e6-96231b3b80d8

Reinstate the x86-64 portion of r55190. When doing extloads into
64-bit registers from 16-bit and smaller memory locations, prefer
instructions that define the entire 64-bit register, to avoid
partial-register updates.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55422 91177308-0d34-0410-b5e6-96231b3b80d8

Optimize ScheduleDAGRRList's topological sort to use one pass instead
of two, and to not need a scratch std::vector. Also, compute the ordering
immediately in the result array, instead of in another scratch std::vector
that is copied to the result array.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55421 91177308-0d34-0410-b5e6-96231b3b80d8

Optimize ScheduleDAG's ComputeDepths and ComputeHeights to not need
a scratch std::vector.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55420 91177308-0d34-0410-b5e6-96231b3b80d8

Remove the std::ostream form of PseudoSourceValue's print,
which isn't needed anymore.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55419 91177308-0d34-0410-b5e6-96231b3b80d8

Update a comment to reflect recent changes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55418 91177308-0d34-0410-b5e6-96231b3b80d8

Unbreak PseudoSourceValue::print. This fixes -print-machine-instrs
and various other things.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55415 91177308-0d34-0410-b5e6-96231b3b80d8

Diagnose uses of unsized types with the byval attribute in the
verifier. See PR2711 for details.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55414 91177308-0d34-0410-b5e6-96231b3b80d8

Update wording, as aggregates are now first-class.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55413 91177308-0d34-0410-b5e6-96231b3b80d8

Add DebugInfoBuilder. Patch by Talin!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55409 91177308-0d34-0410-b5e6-96231b3b80d8

Basic FastISel support for floating-point constants.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55401 91177308-0d34-0410-b5e6-96231b3b80d8

Fix handling of inttoptr and ptrtoint when unhandled operands are present.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55400 91177308-0d34-0410-b5e6-96231b3b80d8

Add support for fast isel of inttoptr and ptrtoint in the cases where truncation is not needed.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55399 91177308-0d34-0410-b5e6-96231b3b80d8

Factor out a large amoutn of the cast handling code in fast isel into helper methods.
This simultaneously makes the code simpler and adds support for sext as well.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55398 91177308-0d34-0410-b5e6-96231b3b80d8

Add a MachineInstrBuilder method for adding floating-point
immediate operands.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55397 91177308-0d34-0410-b5e6-96231b3b80d8

Add support for fast isel of zext.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55396 91177308-0d34-0410-b5e6-96231b3b80d8

disallow direct access to SDValue::ResNo, provide a getter instead

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55394 91177308-0d34-0410-b5e6-96231b3b80d8

Add support for fptosi of constants in fast isel.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55393 91177308-0d34-0410-b5e6-96231b3b80d8

Put a heuristic in place to prevent GVN from falling into bad cases with massively complicated CFGs.
This speeds up a particular testcase from 12+ hours to 5 seconds with little perceptible loss of quality.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55391 91177308-0d34-0410-b5e6-96231b3b80d8

Optimize SelectionDAG's topological sort to use one pass instead
of two, and to not need a scratch std::vector. Also, use the
SelectionDAG's topological sort in LegalizeDAG instead of having
a separate implementation.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55389 91177308-0d34-0410-b5e6-96231b3b80d8

Refactor the bitcast code into its own function.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55387 91177308-0d34-0410-b5e6-96231b3b80d8

Refactor a bunch of FastISelEmitter code into a helper class, and
put each major step in a separate function. This makes the high
level sequence of events easier to follow.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55385 91177308-0d34-0410-b5e6-96231b3b80d8

Make FastISel use the correct argument type when casting GEP indices.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55384 91177308-0d34-0410-b5e6-96231b3b80d8

Don't select binary instructions with illegal types.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55383 91177308-0d34-0410-b5e6-96231b3b80d8

Add support for fast isel of sitofp, and remove some unnecessary and imprecise legality checks.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55381 91177308-0d34-0410-b5e6-96231b3b80d8

- small bug corrected: incorrect iterator type.
- fix to please VS: add a return after an assert.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55380 91177308-0d34-0410-b5e6-96231b3b80d8

Use a combination of copyRegToReg and ISD::BIT_CONVERT when doing fast isel of bitcasts,
allowing it to support the full range of conversions people might ask for in a correct manner.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55378 91177308-0d34-0410-b5e6-96231b3b80d8

These assertions should be return false's instead, allowing the client to detect the failure.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55377 91177308-0d34-0410-b5e6-96231b3b80d8

We need to check that the return type is correct, even in cases where we don't
have a return type that differs from the operand types.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55376 91177308-0d34-0410-b5e6-96231b3b80d8

Make TargetInstrInfo::copyRegToReg return a bool indicating whether the copy requested
was inserted or not.  This allows bitcast in fast isel to properly handle the case
where an appropriate reg-to-reg copy is not available.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55375 91177308-0d34-0410-b5e6-96231b3b80d8

If IV is used in a int-to-float cast inside the loop then try to eliminate the cast operation.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55374 91177308-0d34-0410-b5e6-96231b3b80d8

Add support for fast isel of non-constant fptosi instructions.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55373 91177308-0d34-0410-b5e6-96231b3b80d8

fix doxygen comment

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55372 91177308-0d34-0410-b5e6-96231b3b80d8

Grammar fix.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55371 91177308-0d34-0410-b5e6-96231b3b80d8

Added "str()" method to raw_string_ostream.
str() mirrors the same method in std::ostringstream.
str() flushes the buffered stream contents to string and returns a reference to the string.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55370 91177308-0d34-0410-b5e6-96231b3b80d8

code simplification, no functionality change.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55363 91177308-0d34-0410-b5e6-96231b3b80d8

stabilize more printing, this doesn't cause a problem
in the example attached to PR2590, but is a problem in general.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55361 91177308-0d34-0410-b5e6-96231b3b80d8

stablize SubRegsSet printing, part of PR2590

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55360 91177308-0d34-0410-b5e6-96231b3b80d8

Stabilize 'getDwarfRegNumFull' output to not depend on random memory
orders, part of PR2590

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55359 91177308-0d34-0410-b5e6-96231b3b80d8

If an xmm register is referenced explicitly in an inline asm, make sure to
assign it to a version of the xmm register with the regclass that matches its
type.  This fixes PR2715, a bug handling some crazy xpcom case in mozilla.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55358 91177308-0d34-0410-b5e6-96231b3b80d8

typo fix.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55355 91177308-0d34-0410-b5e6-96231b3b80d8

Actually recycle SDNode allocations. SelectionDAG is using
RecyclingAllocator, but this change is needed for the nodes
to actually be recycled. This cuts SelectionDAG's memory
usage high-water-mark in half in some cases.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55351 91177308-0d34-0410-b5e6-96231b3b80d8

Avoid a warning about isTargetNullPtr being unused in release builds.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55350 91177308-0d34-0410-b5e6-96231b3b80d8

Throw the switch to allow FastISel to emit instructions whose return types different from their inputs.  Next step: adding lowering pattens in FastISel that actually use these newly available opcodes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55349 91177308-0d34-0410-b5e6-96231b3b80d8

This is done.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55348 91177308-0d34-0410-b5e6-96231b3b80d8

Enhance TableGen to emit code for FastISel of opcodes with variadic return types without slowing down opcodes that are not variadic.  No such opcodes are currently generated, but in theory it should be a matter of just hitting the switch.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55347 91177308-0d34-0410-b5e6-96231b3b80d8

Add a RetVT parameter to emitted FastISel methods, so that we will be able to pass the desired return
type down.  This is not currently used.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55345 91177308-0d34-0410-b5e6-96231b3b80d8

Deepen the map structure tablegen uses to compute FastISel patterns, in preparation for having patterns
with return types that differ from their input types.  This is not yet used.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55344 91177308-0d34-0410-b5e6-96231b3b80d8

Implement 32 & 64 bit versions of PPC atomic
binary primitives.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55343 91177308-0d34-0410-b5e6-96231b3b80d8

Unbreak build.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55342 91177308-0d34-0410-b5e6-96231b3b80d8

80 col. violations.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55341 91177308-0d34-0410-b5e6-96231b3b80d8

Expand bitcast support in fast isel to support bitcasts of non-constant values by emitting reg-reg copies.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55340 91177308-0d34-0410-b5e6-96231b3b80d8

Try approach to moving call address load inside of callseq_start. Now it's done during the preprocess of x86 isel. callseq_start's chain is changed to load's chain node; while load's chain is the last of callseq_start or the loads or copytoreg nodes inserted to move arguments to the right spot.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55338 91177308-0d34-0410-b5e6-96231b3b80d8

Remove PPC-specific lowering for atomics; the
generic stuff works fine.

Mark rewritten cmp-and-swap as not using CR1.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55336 91177308-0d34-0410-b5e6-96231b3b80d8

Add support for fast isel of (integer) immediate materialization pattens, and use them to support
bitcast of constants in fast isel.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55325 91177308-0d34-0410-b5e6-96231b3b80d8

Adjust grep's for new code sequence.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55320 91177308-0d34-0410-b5e6-96231b3b80d8

It's important for the cmp-and-swap to balance
loads and stores but it's even more important for
it to store the right value.:(

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55319 91177308-0d34-0410-b5e6-96231b3b80d8

Nevermind. This broke the bootstrap (?!).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55318 91177308-0d34-0410-b5e6-96231b3b80d8

MOVQ2DQ and MOVQ2DQ use SSE2. We should conditionalize the use of these
instructions on having SSE2.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55317 91177308-0d34-0410-b5e6-96231b3b80d8

Fix pasto (values -> types) noticed by Josh Conner

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55315 91177308-0d34-0410-b5e6-96231b3b80d8

flush stream after dumping.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55301 91177308-0d34-0410-b5e6-96231b3b80d8

Fix asm printing of MOVSDto64mr and MOV64toSDrm.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55300 91177308-0d34-0410-b5e6-96231b3b80d8

Fix this test. Don't null out the file, just XFAIL it until patch can be fixed.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55296 91177308-0d34-0410-b5e6-96231b3b80d8

Temporarily reverting r55292. It's causing a bootstraping failure:

/Volumes/Sandbox/Buildbot/llvm/full-llvm/build/llvm-gcc.obj/./gcc/xgcc ... src/libiberty/make-temp-file.c -o make-temp-file.o
Assertion failed: (Node2Index[SU->NodeNum] > Node2Index[I->Dep->NodeNum] && "Wrong topological sorting"), function InitDAGTopologicalSorting, file /Volumes/Sandbox/Buildbot/llvm/full-llvm/build/llvm.src/lib/CodeGen/SelectionDAG/ScheduleDAGRRList.cpp, line 508.
../../../../llvm-gcc.src/libiberty/hashtab.c:955: internal compiler error: Abort trap
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://developer.apple.com/bugreporter> for instructions.
make[4]: *** [hashtab.o] Error 1
make[4]: *** Waiting for unfinished jobs....
make[3]: *** [multi-do] Error 1
make[2]: *** [all] Error 2
make[1]: *** [all-target-libiberty] Error 2
make: *** [all] Error 2

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55295 91177308-0d34-0410-b5e6-96231b3b80d8

remove the type checking logic already done by tblgen, just keep the
parts tblgen doesn't do (checking for constant, alloca, enclosing
function has gc marker).  This passes dj! :)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55294 91177308-0d34-0410-b5e6-96231b3b80d8

simplify PseudoSourceValue printing a bit.  Unnest all of PseudoSourceValue.cpp from the llvm namespace.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55293 91177308-0d34-0410-b5e6-96231b3b80d8

Move callseq_start above the call address load to allow load to be folded into the call node.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55292 91177308-0d34-0410-b5e6-96231b3b80d8

Print PseudoSourceValue.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55291 91177308-0d34-0410-b5e6-96231b3b80d8

we should use 'class' for non-pod types instead of 'struct' to
make it easier to deal with the VC++ struct/class bug.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55290 91177308-0d34-0410-b5e6-96231b3b80d8

add a hack to temporarily allow pseudo source  values.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55289 91177308-0d34-0410-b5e6-96231b3b80d8

make sure to flush the stream after dumping, to make sure it goes out immediately.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55288 91177308-0d34-0410-b5e6-96231b3b80d8

Use additionnal include directory instead of ../ in #include.
Suggested by aKor.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55282 91177308-0d34-0410-b5e6-96231b3b80d8

Updating VC++ project.
Adding one include file and correct one declaration from class to struct in order to make llvm compile on VC2005.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55279 91177308-0d34-0410-b5e6-96231b3b80d8

Update GC docs for clarified naming and AsmWriter refactoring.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55275 91177308-0d34-0410-b5e6-96231b3b80d8

improve encapsulation of the BBExecutable set.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55271 91177308-0d34-0410-b5e6-96231b3b80d8

Switch an assortment of maps, sets and vectors to more efficient versions,
patch contributed by m-s!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55270 91177308-0d34-0410-b5e6-96231b3b80d8

get MachineConstantPool off std::ostream, onto raw_ostream.  It would be
really nice if someone converted MachineFunction::print to raw_ostream.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55268 91177308-0d34-0410-b5e6-96231b3b80d8

minor cleanups.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55267 91177308-0d34-0410-b5e6-96231b3b80d8

remove dead method.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55266 91177308-0d34-0410-b5e6-96231b3b80d8

Add raw_stream adaptors that write into an std::string and SmallVector/SmallString.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55265 91177308-0d34-0410-b5e6-96231b3b80d8