Problem: LLVM needs more function attributes than currently available (32 bits).
One such proposed attribute is "address_safety", which shows that a function is being checked for address safety (by AddressSanitizer, SAFECode, etc).

Solution:
- extend the Attributes from 32 bits to 64-bits
- wrap the object into a class so that unsigned is never erroneously used instead
- change "unsigned" to "Attributes" throughout the code, including one place in clang.
- the class has no "operator uint64 ()", but it has "uint64_t Raw() " to support packing/unpacking.
- the class has "safe operator bool()" to support the common idiom:  if (Attributes attr = getAttrs()) useAttrs(attr);
- The CTOR from uint64_t is marked explicit, so I had to add a few explicit CTOR calls
- Add the new attribute "address_safety". Doing it in the same commit to check that attributes beyond first 32 bits actually work.
- Some of the functions from the Attribute namespace are worth moving inside the class, but I'd prefer to have it as a separate commit.

Tested:
"make check" on Linux (32-bit and 64-bit) and Mac (10.6)
built/run spec CPU 2006 on Linux with clang -O2.


This change will break clang build in lib/CodeGen/CGCall.cpp.
The following patch will fix it.

llvm-svn: 148553

'insertvalue' instructions that recreate the structure returned by the
'landingpad' instruction. Because the 'insertvalue' instruction isn't supported
by FastISel, this can save a bit of time during -O0 compilation.

llvm-svn: 148520

llvm-svn: 148465

llvm-svn: 148464

llvm-svn: 148462

  to instruction right after the last instruction in the bundle.
- Add a finalizeBundle() variant that doesn't specify LastMI. Instead, the code
  will find the last instruction in the bundle by following the 'InsideBundle'
  marker. This is useful in case bundles are formed early (i.e. during MI
  scheduling) but finalized later (i.e. after register allocator has finished
  rewriting virtual registers with physical registers).

llvm-svn: 148444

llvm-svn: 148440

This SelectionDAG node will be attached to call nodes by LowerCall(),
and eventually becomes a MO_RegisterMask MachineOperand on the
MachineInstr representing the call instruction.

LowerCall() will attach a register mask that depends on the calling
convention.

llvm-svn: 148436

llvm-svn: 148408

Fix a bug in the type-legalization of vector integers. When we bitcast one vector type to another, we must not bitcast the result if one type is widened while the other is promoted.

llvm-svn: 148383

Fix ISD::REG_SEQUENCE to accept physical registers and change TwoAddressInstructionPass to insert copies for any physical reg operands of the REG_SEQUENCE

llvm-svn: 148377

llvm-svn: 148337

llvm-svn: 148297

llvm-svn: 148291

Responding to code review.

llvm-svn: 148290

More short term hackery until we have a way to configure passes that work on LiveIntervals.

llvm-svn: 148289

or clang bootstrap.

I will keep an eye on the bots.

Original message:
Only emit the Leh_func_endN symbol when needed.

llvm-svn: 148283

Changed flag operand of ISD::FP_ROUND to TargetConstant as it should not get checked for legalisation

llvm-svn: 148275

llvm-svn: 148268

Removing unused default switch cases in switches over enums that already account for all enumeration values explicitly.

(This time I believe I've checked all the -Wreturn-type warnings from GCC & added the couple of llvm_unreachables necessary to silence them. If I've missed any, I'll happily fix them as soon as I know about them)

llvm-svn: 148262

AggressiveAntiDepBreaker needs to skip debug values because a debug value does not have a corresponding SUnit

llvm-svn: 148260

It is safe to move uses of such registers.

llvm-svn: 148259

llvm-svn: 148251

Register masks will be used as a compact representation of large clobber
lists.  Currently, an x86 call instruction has some 40 operands
representing call-clobbered registers.  That's more than 1kB of useless
operands per call site.

A register mask operand references a bit mask of call-preserved
registers, everything else is clobbered.  The bit mask will typically
come from TargetRegisterInfo::getCallPreservedMask().

By abandoning ImplicitDefs for call-clobbered registers, it also becomes
possible to share call instruction descriptions between calling
conventions, and we can get rid of the WINCALL* instructions.

This patch introduces the new operand kind.  Future patches will add
RegMask support to target-independent passes before finally the fixed
clobber lists can be removed from call instruction descriptions.

llvm-svn: 148250

llvm-svn: 148230

Changed intrinsic ID operand to a target constant as its not used in any arithmetic so should not be checked in legalisation

llvm-svn: 148228

We know that the blend instructions only use the MSB, so if the mask is
sign-extended then we can convert it into a SHL instruction. This is a
common pattern because the type-legalizer sign-extends the i1 type which
is used by the LLVM-IR for the condition.

Added a new optimization in SimplifyDemandedBits for SIGN_EXTEND_INREG -> SHL.

llvm-svn: 148225

llvm-svn: 148218

llvm-svn: 148217

llvm-svn: 148205

non-determinism in the 32 bit dragonegg buildbot.  Original commit
message:
Only emit the Leh_func_endN symbol when needed.

llvm-svn: 148191

llvm-svn: 148175

llvm-svn: 148174

llvm-svn: 148173

llvm-svn: 148172

llvm-svn: 148171

llvm-svn: 148170

live across BBs before register allocation. This miscompiled 197.parser
when a cmp + b are optimized to a cbnz instruction even though the CPSR def
is live-in a successor.
        cbnz    r6, LBB89_12
...
LBB89_12:
        ble     LBB89_1

The fix consists of two parts. 1) Teach LiveVariables that some unallocatable
registers might be liveouts so don't mark their last use as kill if they are.
2) ARM constantpool island pass shouldn't form cbz / cbnz if the conditional
branch does not kill CPSR.

rdar://10676853

llvm-svn: 148168

llvm-svn: 148156

llvm-svn: 148150