Allow GVN to eliminate redundant calls to functions without side effects.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43147 91177308-0d34-0410-b5e6-96231b3b80d8

Add an uppercase conversion utility function.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43146 91177308-0d34-0410-b5e6-96231b3b80d8

Fix a misnamed parameter.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43145 91177308-0d34-0410-b5e6-96231b3b80d8

Fix a typo

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43144 91177308-0d34-0410-b5e6-96231b3b80d8

Fix PR1735 and Transforms/DeadArgElim/2007-10-18-VarargsReturn.ll by
fixing some obviously broken code :(

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43141 91177308-0d34-0410-b5e6-96231b3b80d8

Fix the command line.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43140 91177308-0d34-0410-b5e6-96231b3b80d8

Fix test.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43136 91177308-0d34-0410-b5e6-96231b3b80d8

this doesn't need dynamic_cast.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43133 91177308-0d34-0410-b5e6-96231b3b80d8

remove dead file

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43131 91177308-0d34-0410-b5e6-96231b3b80d8

Reduce reliance on rtti info

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43130 91177308-0d34-0410-b5e6-96231b3b80d8

fix typo

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43129 91177308-0d34-0410-b5e6-96231b3b80d8

update comment.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43128 91177308-0d34-0410-b5e6-96231b3b80d8

This requires rtti info because tblgen uses commandline,
and tblgen requires rtti.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43127 91177308-0d34-0410-b5e6-96231b3b80d8

tblgen uses dynamic_cast heavily, so it needs rtti info

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43126 91177308-0d34-0410-b5e6-96231b3b80d8

Updated VC++ build system

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43123 91177308-0d34-0410-b5e6-96231b3b80d8

Work around downrev gccs which do not inherit visibility of the
Registry<>::iterator member class.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43122 91177308-0d34-0410-b5e6-96231b3b80d8

Missing 'public' keyword.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43121 91177308-0d34-0410-b5e6-96231b3b80d8

Pointer arithmetic should be done with the index the same size as the pointer.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43120 91177308-0d34-0410-b5e6-96231b3b80d8

Support for ADDC/SUBC.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43119 91177308-0d34-0410-b5e6-96231b3b80d8

Really fix PR1734. Carefully track which register uses are sub-register uses by
traversing inverse register coalescing map.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43118 91177308-0d34-0410-b5e6-96231b3b80d8

Remove unnecessary include.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43117 91177308-0d34-0410-b5e6-96231b3b80d8

legalizing the ret operation on f64 shouldn't introduce a new
i64 bit convert needlessly.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43116 91177308-0d34-0410-b5e6-96231b3b80d8

Move Split<...>() into DomTreeBase.  This should make the #include's of DominatorInternals.h
in CodeExtractor and LoopSimplify unnecessary.

Hartmut, could you confirm that this fixes the issues you were seeing?

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43115 91177308-0d34-0410-b5e6-96231b3b80d8

XFAIL for now.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43111 91177308-0d34-0410-b5e6-96231b3b80d8

Changed the return type of type-specific Allocate() methods to return
void*.  This is hint that we are returning uninitialized memory rather
than a constructed object.

Patched ImutAVLTree to conform to this new interface.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43106 91177308-0d34-0410-b5e6-96231b3b80d8

Reverting r43070 for now. It's causing llc test failures.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43103 91177308-0d34-0410-b5e6-96231b3b80d8

Test to make sure we don't generate unwind info for non-64-bit Objective-C.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43102 91177308-0d34-0410-b5e6-96231b3b80d8

ImutAVLTree now allocates tree nodes from the BumpPtrAllocator using
the new type-aligned Allocate() method.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43100 91177308-0d34-0410-b5e6-96231b3b80d8

Removed inclusion of cassert, which is no longer needed.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43099 91177308-0d34-0410-b5e6-96231b3b80d8

Minor cosmetic cleanups in the calculation of alignments for
StringMapEntry objects.  No functionality change.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43097 91177308-0d34-0410-b5e6-96231b3b80d8

Added template function alignof() which provides a clean
function-based interface to getting the alignment of a type.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43096 91177308-0d34-0410-b5e6-96231b3b80d8

Reverting unnecessary commit of generated files.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43095 91177308-0d34-0410-b5e6-96231b3b80d8

Switching TargetMachineRegistry to use the new generic Registry.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43094 91177308-0d34-0410-b5e6-96231b3b80d8

Updated StringMap to use llvm::AlignOf to compute the alignment of map
entries.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43089 91177308-0d34-0410-b5e6-96231b3b80d8

Ignoring test/Transforms/LoopIndexSplit/Output.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43088 91177308-0d34-0410-b5e6-96231b3b80d8

Added member template functions to MallocAllocator and
BumpPtrAllocator that implement allocations that return a properly
typed pointer.  For BumpPtrAllocator, the allocated memory is
automatically aligned to the minimum alignment of the type (as
calculated by llvm::AlignOf::Alignment).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43087 91177308-0d34-0410-b5e6-96231b3b80d8

Added llvm::AlignOf, a template class whose purpose is to portably
compute the minimum memory alignment of arbitrary types.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43086 91177308-0d34-0410-b5e6-96231b3b80d8

Do not raise free() call that is called through invoke instruction.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43083 91177308-0d34-0410-b5e6-96231b3b80d8

Fixed linker errors (unresolved externals: split<>(...)) when compiling with VC++. Please review.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43081 91177308-0d34-0410-b5e6-96231b3b80d8

Don't mention -enable-unsafe-fp-math in LangRef.html, as that option is
assumed to globally mutate the spec.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43078 91177308-0d34-0410-b5e6-96231b3b80d8

Define a helper function ConstantVector::getSplatValue for testing for
and working with broadcasted constants.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43076 91177308-0d34-0410-b5e6-96231b3b80d8

Updated VC++ build system.
Silenced some VC warnings.

I'm getting linker errors, though: unresolved externals:

llvm::Split<class llvm::BasicBlock *,struct llvm::GraphTraits<class llvm::BasicBlock *> >(class llvm::DominatorTreeBase<class llvm::BasicBlock> &,class llvm::BasicBlock *)

and

llvm::Split<struct llvm::Inverse<class llvm::BasicBlock *>,struct llvm::GraphTraits<struct llvm::Inverse<class llvm::BasicBlock *> > >(class llvm::DominatorTreeBase<class llvm::BasicBlock> &,class llvm::BasicBlock *)

Where are these defined?

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43073 91177308-0d34-0410-b5e6-96231b3b80d8

Add support for ISD::SELECT in SplitVectorOp.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43072 91177308-0d34-0410-b5e6-96231b3b80d8

Return Expand from getOperationAction for all extended
types.  This is needed for SIGN_EXTEND_INREG at least.
It is not clear if this is correct for other operations.
On the other hand, for the various load/store actions
it seems to correct to return the type action, as is
currently done.
Also, it seems that SelectionDAG::getValueType can be
called for extended value types; introduce a map for
holding these, since we don't really want to extend
the vector to be 2^32 pointers long!
Generalize DAGTypeLegalizer::PromoteResult_TRUNCATE
and DAGTypeLegalizer::PromoteResult_INT_EXTEND to handle
the various funky possibilities that apints introduce,
for example that you can promote to a type that needs
to be expanded.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43071 91177308-0d34-0410-b5e6-96231b3b80d8

Apply "Instead of loading small c string constant, use integer constant directly" transformation while processing load instruction.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43070 91177308-0d34-0410-b5e6-96231b3b80d8

Apply Chris' suggestions.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43069 91177308-0d34-0410-b5e6-96231b3b80d8

Change fp to sint legalization on x86-32 to do 2 x i32
loads instead of 1 x i64 loads.  This doesn't change any functionality yet.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43068 91177308-0d34-0410-b5e6-96231b3b80d8

fix some funny indentation, add comments.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43066 91177308-0d34-0410-b5e6-96231b3b80d8

One more extract_subreg coalescing bug fix.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43065 91177308-0d34-0410-b5e6-96231b3b80d8

Update comments.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43064 91177308-0d34-0410-b5e6-96231b3b80d8

Yet another test case for extract_subreg coalescing crash.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43063 91177308-0d34-0410-b5e6-96231b3b80d8

Fix MergeValueInAsValue(). It allows overlapping live ranges but should replace
their value numbers with the specified value number.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43062 91177308-0d34-0410-b5e6-96231b3b80d8

Clean up code that calculate MBB live-in's.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43061 91177308-0d34-0410-b5e6-96231b3b80d8

Clean up code that calculate MBB live-in's.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43060 91177308-0d34-0410-b5e6-96231b3b80d8

Move splitBlock into DomTreeBase from DomTree.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43059 91177308-0d34-0410-b5e6-96231b3b80d8

Use immediate stores.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43055 91177308-0d34-0410-b5e6-96231b3b80d8

Disable attempts to constant fold PPC f128.
Remove the assumption that this will happen from
various places.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43053 91177308-0d34-0410-b5e6-96231b3b80d8

Fix some formatting.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43049 91177308-0d34-0410-b5e6-96231b3b80d8

Some clean up.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43043 91177308-0d34-0410-b5e6-96231b3b80d8

Template DominatorTreeBase by node type.  This is the next major step towards
having dominator information on MBB's.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43036 91177308-0d34-0410-b5e6-96231b3b80d8

Fix PR1734.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43035 91177308-0d34-0410-b5e6-96231b3b80d8

New test for svn rev 43033, radar 5538745.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43034 91177308-0d34-0410-b5e6-96231b3b80d8

Check for invalid cc's in f80 select.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43033 91177308-0d34-0410-b5e6-96231b3b80d8

Fix a bug handling frame references in ppc inline asm when the frame offset
doesn't fit into 16 bits.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43032 91177308-0d34-0410-b5e6-96231b3b80d8

Document the fact that the verifier currently requires the
top bit of a ValueType to be zero.  Enforce this by ensuring
an assertion failure if someone tries to create a ValueType
without this property.  I chose this minimal approach rather
than a more official integration of the notion of reserved
bits into ValueType because I'm hoping that the verifier will
be changed to no longer require this :)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43031 91177308-0d34-0410-b5e6-96231b3b80d8

Initial infrastructure for arbitrary precision integer
codegen support.  This should have no effect on codegen
for other types.  Debatable bits: (1) the use (abuse?)
of a set in SDNode::getValueTypeList; (2) the length of
getTypeToTransformTo, which maybe should be refactored
with a non-inline part for extended value types.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43030 91177308-0d34-0410-b5e6-96231b3b80d8

Fixes due to lack of type-safety for ValueType: (1) ValueType
being passed instead of an opcode; (2) ValueType being passed
for isVolatile (!) in getLoad.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43028 91177308-0d34-0410-b5e6-96231b3b80d8

Correction to tail call optimization code. The new return address
was stored to the acutal stack slot before the parameters were
lowered to their stack slot. This could cause arguments to be
overwritten by the return address if the called function had less
parameters than the caller function. The update should remove the
last failing test case of llc-beta: SPASS.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43027 91177308-0d34-0410-b5e6-96231b3b80d8

Code clean up.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43026 91177308-0d34-0410-b5e6-96231b3b80d8

implement promotion of select and select_cc, allowing MallocBench/gs to
work with type promotion on x86.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43025 91177308-0d34-0410-b5e6-96231b3b80d8

Teach IntrinsicLowering.cpp about the sin, cos, and pow intrinsics.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43020 91177308-0d34-0410-b5e6-96231b3b80d8

Make CalcLatency() non-recursive.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43017 91177308-0d34-0410-b5e6-96231b3b80d8

Fix a typo in a comment.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43016 91177308-0d34-0410-b5e6-96231b3b80d8

Document the -view-sunit-dags option.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43015 91177308-0d34-0410-b5e6-96231b3b80d8

Document the new llvm.sin, llvm.cos, and llvm.pow intrinsics. Feedback
is welcome!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43007 91177308-0d34-0410-b5e6-96231b3b80d8

Change LowerFP_TO_SINT to create the specific code it needs instead of
unconditionally creating an i64 bitcast.  With the future legalizer
design, operation legalization can't introduce new nodes with illegal
types.

This fixes the rest of olden on ppc32.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43005 91177308-0d34-0410-b5e6-96231b3b80d8

LowerFP_TO_SINT must not create a stack object if it's not needed.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43004 91177308-0d34-0410-b5e6-96231b3b80d8

Add removeModuleProvider()

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43002 91177308-0d34-0410-b5e6-96231b3b80d8

Reapply the fix in 42908 for this file. This changes the function names
from "test" to "foo" so that they don't match the grep -i ST.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43001 91177308-0d34-0410-b5e6-96231b3b80d8

Fixed incorrect renaming of method name (forgot two characters).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42999 91177308-0d34-0410-b5e6-96231b3b80d8

Added more doxygen comments.
Renamed internal method of ImutAVLTree::RemoveMutableFlag to MarkImmutable.
Added enum for bit manipulation (more self-documentating).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42998 91177308-0d34-0410-b5e6-96231b3b80d8

Fix PR1729: watch out for val# with no def.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42996 91177308-0d34-0410-b5e6-96231b3b80d8

Move CreateStackTemporary out to SelectionDAG

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42995 91177308-0d34-0410-b5e6-96231b3b80d8

add a new CreateStackTemporary helper method.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42994 91177308-0d34-0410-b5e6-96231b3b80d8

implement promotion of BR_CC operands, fixing bisort on ppc.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42992 91177308-0d34-0410-b5e6-96231b3b80d8

updates from duncan

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42991 91177308-0d34-0410-b5e6-96231b3b80d8

Fix run line.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42990 91177308-0d34-0410-b5e6-96231b3b80d8

New test.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42986 91177308-0d34-0410-b5e6-96231b3b80d8

Achieve same result but use fewer lines of code.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42985 91177308-0d34-0410-b5e6-96231b3b80d8

Fast-track obviously over-large and over-small exponents during decimal->
integer conversion.  In some such cases this makes us one or two orders
of magnitude faster than NetBSD's libc.  Glibc seems to have a similar
fast path.

Also, tighten up some upper bounds to save a bit of memory.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42984 91177308-0d34-0410-b5e6-96231b3b80d8

Fix some typos.  Call getTypeToTransformTo rather than
getTypeToExpandTo.  The difference is that
getTypeToExpandTo gives the final result of expansion
(eg: i128 -> i32 on a 32 bit machine) while
getTypeToTransformTo does just one step (i128 -> i64).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42982 91177308-0d34-0410-b5e6-96231b3b80d8

One mundane change: Change ReplaceAllUsesOfValueWith to *optionally*
take a deleted nodes vector, instead of requiring it.

One more significant change:  Implement the start of a legalizer that
just works on types.  This legalizer is designed to run before the
operation legalizer and ensure just that the input dag is transformed
into an output dag whose operand and result types are all legal, even
if the operations on those types are not.

This design/impl has the following advantages:

1. When finished, this will *significantly* reduce the amount of code in
   LegalizeDAG.cpp.  It will remove all the code related to promotion and
   expansion as well as splitting and scalarizing vectors.
2. The new code is very simple, idiomatic, and modular: unlike
   LegalizeDAG.cpp, it has no 3000 line long functions. :)
3. The implementation is completely iterative instead of recursive, good
   for hacking on large dags without blowing out your stack.
4. The implementation updates nodes in place when possible instead of
   deallocating and reallocating the entire graph that points to some
   mutated node.
5. The code nicely separates out handling of operations with invalid
   results from operations with invalid operands, making some cases
   simpler and easier to understand.
6. The new -debug-only=legalize-types option is very very handy :),
   allowing you to easily understand what legalize types is doing.

This is not yet done.  Until the ifdef added to SelectionDAGISel.cpp is
enabled, this does nothing.  However, this code is sufficient to legalize
all of the code in 186.crafty, olden and freebench on an x86 machine.  The
biggest issues are:

1. Vectors aren't implemented at all yet
2. SoftFP is a mess, I need to talk to Evan about it.
3. No lowering to libcalls is implemented yet.
4. Various operations are missing etc.
5. There are FIXME's for stuff I hax0r'd out, like softfp.

Hey, at least it is a step in the right direction :).  If you'd like to help,
just enable the #ifdef in SelectionDAGISel.cpp and compile code with it.  If
this explodes it will tell you what needs to be implemented.  Help is
certainly appreciated.

Once this goes in, we can do three things:

1. Add a new pass of dag combine between the "type legalizer" and "operation
   legalizer" passes.  This will let us catch some long-standing isel issues
   that we miss because operation legalization often obfuscates the dag with
   target-specific nodes.
2. We can rip out all of the type legalization code from LegalizeDAG.cpp,
   making it much smaller and simpler.  When that happens we can then
   reimplement the core functionality left in it in a much more efficient and
   non-recursive way.
3. Once the whole legalizer is non-recursive, we can implement whole-function
   selectiondags maybe...

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42981 91177308-0d34-0410-b5e6-96231b3b80d8

One xform performed by LegalizeDAG is transformation of "store of fp" to "store of int".
Make two changes:
1) only xform "store of f32" if i32 is a legal type for the target.
2) only xform "store of f64" if either i64 or i32 are legal for the target.
3) if i64 isn't legal, manually lower to 2 stores of i32 instead of letting a
   later pass of legalize do it.  This is ugly, but helps future changes I'm
   about to commit.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42980 91177308-0d34-0410-b5e6-96231b3b80d8

avoid an APFloat copy.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42979 91177308-0d34-0410-b5e6-96231b3b80d8

Add a (disabled by default) way to view the ID of a node.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42978 91177308-0d34-0410-b5e6-96231b3b80d8

remove dead enum, make setNodeId public.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42977 91177308-0d34-0410-b5e6-96231b3b80d8

Fix 80 col violation

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42976 91177308-0d34-0410-b5e6-96231b3b80d8

Handle PPC long double in CBackend.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42972 91177308-0d34-0410-b5e6-96231b3b80d8

remove misleading comment.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42970 91177308-0d34-0410-b5e6-96231b3b80d8

If a target doesn't have HasMULHU or HasUMUL_LOHI, ExpandOp would return
without lo/hi set.  Fall through to making a libcall instead.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42969 91177308-0d34-0410-b5e6-96231b3b80d8