SelectionDAG: Don't constant fold target-specific nodes.

FoldConstantArithmetic() only knows how to deal with a few target independent
ISD opcodes. Bail early if it sees a target-specific ISD node. These node do
funny things with operand types which may break the assumptions of the code
that follows, and there's no actual folding that can be done anyway. For example,
non-constant 256 bit vector shifts on X86 have a shift-amount operand that's a
128-bit v4i32 vector regardless of what the first operand type is and that breaks
the assumption that the operand types must match.

rdar://16530923

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205937 91177308-0d34-0410-b5e6-96231b3b80d8
Add support for load folding of avx1 logical instructions

AVX supports logical operations using an operand from memory. Unfortunately
because integer operations were not added until AVX2 the AVX1 logical
operation's types were preventing the isel from folding the loads. In a limited
number of cases the peephole optimizer would fold the loads, but most were
missed. This patch adds explicit patterns with appropriate casts in order for
these loads to be folded.

The included test cases run on reduced examples and disable the peephole
optimizer to ensure the folds are being pattern matched.

Patch by Louis Gerbarg <lgg@apple.com>

rdar://16355124

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205938 91177308-0d34-0410-b5e6-96231b3b80d8
X86: Tighten up test.

llc CPU autodection bites again. Speculative fix for bot failures.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205940 91177308-0d34-0410-b5e6-96231b3b80d8
Fix to support properly cleaning up failed address sinking against constants

As it turns out the source of the sunkaddr can be a constant, in which case
there is not an instruction to delete, causing the cleanup code introduced in
r204833 to crash. This patch adds a dynamic check to ensure the deleted value is
in fact an instruction and not a constant.

Patch by Louis Gerbarg <lgg@apple.com>

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205941 91177308-0d34-0410-b5e6-96231b3b80d8
Revert "For the ARM integrated assembler add checking of the alignments on vld/vst instructions.  And report errors for alignments that are not supported."

It doesn't build with MSVC 2012, because MSVC doesn't allow union
members that have non-trivial default constructors.  This change added
'SMLoc AlignmentLoc' to MemoryOp, which made MemoryOp's default ctor
non-trivial.

This reverts commit r205930.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205944 91177308-0d34-0410-b5e6-96231b3b80d8
[ARM64] Fix immediate cost calculation for types larger than i64.

The immediate cost calculation code was hitting an assertion in the included
test case, because APInt was still internally 128-bits. Truncating it to 64-bits
fixed the issue.

Fixes <rdar://problem/16572521>.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205947 91177308-0d34-0410-b5e6-96231b3b80d8
ARM64: add an explicit cast to silence a silly warning

GCC 4.8 complains with:
  warning: enumeral and non-enumeral type in conditional expression

Although this is silly and harmless in this case, add an explicit cast to
silence the warning.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205949 91177308-0d34-0410-b5e6-96231b3b80d8
Fix abuse of StringRef on ARM64SysReg::MRSMapper::toString(Val, Valid).

FIXME: Could we use SmallString here?

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205950 91177308-0d34-0410-b5e6-96231b3b80d8
Use range-based for loops. No functionality change.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205953 91177308-0d34-0410-b5e6-96231b3b80d8
YAMLIO: Allow scalars to dictate quotation rules

Introduce ScalarTraits::mustQuote which determines whether or not a
StringRef needs quoting before it is acceptable to output.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205955 91177308-0d34-0410-b5e6-96231b3b80d8
SaveAndRestore: fix coding style and Doxygenify comments


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205959 91177308-0d34-0410-b5e6-96231b3b80d8
LLVMBuild.txt: Reformat.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205961 91177308-0d34-0410-b5e6-96231b3b80d8
LLVMBuild.txt: Add missing dependencies.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205962 91177308-0d34-0410-b5e6-96231b3b80d8
ARM64/*/LLVMBuild.txt: Prune redundant deps.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205963 91177308-0d34-0410-b5e6-96231b3b80d8
[mips] Switch the MIPS-III and MIPS-IV assembler tests to use -mcpu=mips4.

Summary:
It is now the smallest superset for these ISA's.

FeatureMips4 now contains FeatureFPIdx since [ls][dw]xc1 were added in MIPS-IV.
Made the FPIdx feature bit lowercase so that it can be used in the -mattr option.

Depends on D3274

Reviewers: matheusalmeida

Reviewed By: matheusalmeida

Differential Revision: http://reviews.llvm.org/D3275

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205964 91177308-0d34-0410-b5e6-96231b3b80d8
Reapply "SLPVectorizer: Ignore users that are insertelements we can reschedule them"

This commit reapplies 205018. After 205855 we should correctly vectorize
intrinsics.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205965 91177308-0d34-0410-b5e6-96231b3b80d8
[mips] NotMips64 predicate is really a test for 32-bit GPR's.

Summary:
Similarly, the HasMips64 on the 64-bit move InstAlias is a test for 64-bit
GPR's.

No functional change.

Reviewers: matheusalmeida

Reviewed By: matheusalmeida

Differential Revision: http://reviews.llvm.org/D3263

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205968 91177308-0d34-0410-b5e6-96231b3b80d8
AddLLVM: Mute the prefix "lib" in SHARED on win32.

  - LLVMSupport.dll
  - libLLVMSupport.dll.a

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205969 91177308-0d34-0410-b5e6-96231b3b80d8
Debug info: Factor the retrieving of the DIVariable from a MachineInstr
into a function.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205973 91177308-0d34-0410-b5e6-96231b3b80d8
Follow-up to r205973: change the return type to const MDNode*.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205974 91177308-0d34-0410-b5e6-96231b3b80d8