To allow the X86 verbose assembly to print its informative comments
when used with symbolic disassembly, add a check that the operand
is an immediate and has not been symbolicated to MCExpr operand.

I’m trying to enable the ‘C’ disassembly API option
LLVMDisassembler_Option_SetInstrComments for darwin’s
otool(1) that uses the llvm disassembler API.  The problem is
that the disassembler API can change an immediate operand to
an MCExpr operand if it symbolicates it with the call backs.
And if it does the code in llvm::EmitAnyX86InstComments()
will crash when it assumes these operands are immediates.

The fix for this is very straight forward to just protect the call
to getImm() with a check of isImm().  So if the immediate for
an instruction is symbolicated it simply doesn’t get the X86
verbose assembly comments:

% otool -tV test_asm.o
test_asm.o:
(__TEXT,__text) section
_t1:
0000000000000000	vpshufd	$_t1, %xmm1, %xmm0
0000000000000005	retq
0000000000000006	nopw	%cs:_t1(%rax,%rax)
_t2:
0000000000000010	vpshufd	$-0x1, %xmm0, %xmm0     ## xmm0 = xmm0[3,3,3,3]
0000000000000015	retq
0000000000000016	nopw	%cs:_t1(%rax,%rax)
_t3:
0000000000000020	vpshufd	$_t1, %xmm1, %xmm0
0000000000000025	retq
0000000000000026	nopw	%cs:_t1(%rax,%rax)
_t4:
0000000000000030	vpshufd	$0x2d, %xmm0, %xmm0     ## xmm0 = xmm0[1,3,2,0]
0000000000000035	retq

The fact that the immediate $0x0 is being symbolicated at
all in this case is a different problem which my next patch
will address.

rdar://10989286


git-svn-id: http://llvm.org/svn/llvm-project/llvm/trunk@199697 91177308-0d34-0410-b5e6-96231b3b80d8
Tweak the MCExternalSymbolizer to not use the SymbolLookUp() call back
to not guess at a symbol name in some cases.

The problem is that in object files assembled starting at address 0, when
trying to symbolicate something that starts like this:

% cat x.s
_t1:
	vpshufd	$0x0, %xmm1, %xmm0

the symbolic disassembly can end up like this:

% otool -tV x.o 
x.o:
(__TEXT,__text) section
_t1:
0000000000000000	vpshufd	$_t1, %xmm1, %xmm0

Which is in this case produced incorrect symbolication.

But it is useful in some cases to use the SymbolLookUp() call back
to guess at some immediate values.  For example one like this
that does not have an external relocation entry:

% cat y.s
_t1:
	movl	$_d1, %eax
.data
_d1:	.long	0

% clang -c -arch i386 y.s

% otool -tV y.o 
y.o:
(__TEXT,__text) section
_t1:
0000000000000000	movl	$_d1, %eax

% otool -rv y.o 
y.o:
Relocation information (__TEXT,__text) 1 entries
address  pcrel length extern type    scattered symbolnum/value
00000001 False long   False  VANILLA False     2 (__DATA,__data)

So the change is based on it is not likely that an immediate Value
coming from an instruction field of a width of 1 byte, other than branches
and items with relocation, are not likely symbol addresses.

With the change the first case above simply becomes:

% otool -tV x.o 
x.o:
(__TEXT,__text) section
_t1:
0000000000000000	vpshufd	$0x0, %xmm1, %xmm0

and the second case continues to work as expected.

rdar://14863405


git-svn-id: http://llvm.org/svn/llvm-project/llvm/trunk@199698 91177308-0d34-0410-b5e6-96231b3b80d8
Add operator!= for FoldingSetNodeID and FoldingSetNodeIDRef. Implementation in
the header forwards to operator== which is not in the header.


git-svn-id: http://llvm.org/svn/llvm-project/llvm/trunk@199702 91177308-0d34-0410-b5e6-96231b3b80d8
[AArch64 NEON] Fix a bug caused by undef lane when generating VEXT.

It was commited as r199628 but reverted in r199628 as causing
regression test failed. It's because of old vervsion of patch
I used to commit. Sorry for mistake.

git-svn-id: http://llvm.org/svn/llvm-project/llvm/trunk@199704 91177308-0d34-0410-b5e6-96231b3b80d8
ARM IAS: support .personalityindex

The .personalityindex directive is equivalent to the .personality directive with
the ARM EABI personality with the specific index (0, 1, 2).  Both of these
directives indicate personality routines, so enhance the personality directive
handling to take into account personalityindex.

Bonus fix: flush the UnwindContext at the beginning of a new function.

Thanks to Logan Chien for additional tests!

git-svn-id: http://llvm.org/svn/llvm-project/llvm/trunk@199706 91177308-0d34-0410-b5e6-96231b3b80d8
ARM IAS: add support for .unwind_raw directive

This implements the unwind_raw directive for the ARM IAS.  The unwind_raw
directive takes the form of a stack offset value followed by one or more bytes
representing the opcodes to be emitted.  The opcode emitted will interpreted as
if it were assembled by the opcode assembler via the standard unwinding
directives.

Thanks to Logan Chien for an extra test!

git-svn-id: http://llvm.org/svn/llvm-project/llvm/trunk@199707 91177308-0d34-0410-b5e6-96231b3b80d8
tools: support decoding ARM EHABI opcodes in readobj

Add support to llvm-readobj to decode the actual opcodes.  The ARM EHABI opcodes
are a variable length instruction set that describe the operations required for
properly unwinding stack frames.

The primary motivation for this change is to ease the creation of tests for the
ARM EHABI object emission as well as the unwinding directive handling in the ARM
IAS.

Thanks to Logan Chien for an extra test case!

git-svn-id: http://llvm.org/svn/llvm-project/llvm/trunk@199708 91177308-0d34-0410-b5e6-96231b3b80d8
tools: use 64-bit print specifier

Try to repair the ARM Cortex-A15 buildbot by using a more appropriate conversion
specifier.

git-svn-id: http://llvm.org/svn/llvm-project/llvm/trunk@199711 91177308-0d34-0410-b5e6-96231b3b80d8
Use ArrayRef to simplify some code.

git-svn-id: http://llvm.org/svn/llvm-project/llvm/trunk@199712 91177308-0d34-0410-b5e6-96231b3b80d8
Fix libstdc++4.7 test on Android.


git-svn-id: http://llvm.org/svn/llvm-project/llvm/trunk@199714 91177308-0d34-0410-b5e6-96231b3b80d8
Checked return warning from coverity

git-svn-id: http://llvm.org/svn/llvm-project/llvm/trunk@199716 91177308-0d34-0410-b5e6-96231b3b80d8
MIPS: mark intrinsics IntrNoMem so all patterns using them are consistent.

This is apparently a bit of a white lie (they can affect DSPControl for
overflow etc) but similar to how we currently handle floating-point operations.
When it becomes relevant the whole lot can be reviewed properly.

git-svn-id: http://llvm.org/svn/llvm-project/llvm/trunk@199718 91177308-0d34-0410-b5e6-96231b3b80d8
[mips][sched] Split IIslt into II_SLT_SLTU, II_SLTI_SLTIU

No functional change since the InstrItinData's have been duplicated.



git-svn-id: http://llvm.org/svn/llvm-project/llvm/trunk@199719 91177308-0d34-0410-b5e6-96231b3b80d8
[mips][sched] Split IIFcvt into II_(ROUND|TRUNC|CEIL|FLOOR|CVT), II_ABS, II_NEG

No functional change since the InstrItinData's have been duplicated.



git-svn-id: http://llvm.org/svn/llvm-project/llvm/trunk@199722 91177308-0d34-0410-b5e6-96231b3b80d8
[mips][sched] Split IIFmove into II_C[FT]C1, II_MOV[FNTZ]_[SD], II_MOV_[SD]

No functional change since the InstrItinData's have been duplicated.



git-svn-id: http://llvm.org/svn/llvm-project/llvm/trunk@199727 91177308-0d34-0410-b5e6-96231b3b80d8
[mips][sched] Split IIFcmp into II_C_CC_[SD]

No functional change since the InstrItinData's have been duplicated.



git-svn-id: http://llvm.org/svn/llvm-project/llvm/trunk@199728 91177308-0d34-0410-b5e6-96231b3b80d8
[mips][sched] Split IIFadd into II_ADD_[DS], II_SUB_[DS]

No functional change since the InstrItinData's have been duplicated.



git-svn-id: http://llvm.org/svn/llvm-project/llvm/trunk@199732 91177308-0d34-0410-b5e6-96231b3b80d8
[mips][sched] Split IIFmulSingle into II_MUL_S, II_MADD_S, II_MSUB_S, II_NMADD_S, and II_NMSUB_S

No functional change since the InstrItinData's have been duplicated.



git-svn-id: http://llvm.org/svn/llvm-project/llvm/trunk@199734 91177308-0d34-0410-b5e6-96231b3b80d8
[mips][sched] Split IIFmulDouble into II_MUL_D, II_MADD_D, II_MSUB_D, II_NMADD_D, and II_NMSUB_S

No functional change since the InstrItinData's have been duplicated.



git-svn-id: http://llvm.org/svn/llvm-project/llvm/trunk@199737 91177308-0d34-0410-b5e6-96231b3b80d8
[mips][sched] Renamed II_FdivSingle and II_FdivDouble to II_DIV_S and II_DIV_D respectively

No functional change



git-svn-id: http://llvm.org/svn/llvm-project/llvm/trunk@199738 91177308-0d34-0410-b5e6-96231b3b80d8