This checkin also adds in some tests that utilize these paths and updates some of the
clients.

llvm-svn: 166578

- If more than 1 elemennts are defined and target supports the vectorized
  conversion, use the vectorized one instead to reduce the strength on
  conversion operation.

llvm-svn: 166546

llvm-svn: 166531

llvm-svn: 166519

Make the indirect branch optimization deterministic. No functionality change.

Patch by Daniel Reynaud.

llvm-svn: 166501

every TU where it's implicitly instantiated, even if there's an implicit
instantiation for the same types available in another TU.

llvm-svn: 166470

Reported by Vincent Lejeune using an out-of-tree target.

llvm-svn: 166398

llvm-svn: 166376

  (The change at Clang side was committed in r166345)

2. Cosmetic change in order to conform to coding standards. 

llvm-svn: 166350

llvm-svn: 166340

which is supposed to consistently raise SIGTRAP across all systems. In contrast,
__builtin_trap() behave differently on different systems. e.g. it raises SIGTRAP on ARM, and
SIGILL on X86. The purpose of __builtin_debugtrap() is to consistently provide "trap"
functionality, in the mean time preserve the compatibility with on gcc on __builtin_trap().

  The X86 backend is already able to handle debugtrap(). This patch is to:
  1) make front-end recognize "__builtin_debugtrap()" (emboddied in the one-line change to Clang).
  2) In DAG legalization phase, by default, "debugtrap" will be replaced with "trap", which
     make the __builtin_debugtrap() "available" to all existing ports without the hassle of
     changing their code.
  3) If trap-function is specified (via -trap-func=xyz to llc), both __builtin_debugtrap() and
     __builtin_trap() will be expanded into the function call of the specified trap function.
    This behavior may need change in the future.

  The provided testing-case is to make sure 2) and 3) are working for ARM port, and we
already have a testing case for x86. 

llvm-svn: 166300

llvm-svn: 166264

llvm-svn: 166260

When merging stack slots, if StackColoring::remapInstructions gets a
value back from GetUnderlyingObject that it does not know about or is
not itself a stack slot, clear the memory operand in case it aliases
the merged slot. This prevents the introduction of incorrect aliasing
information.

Author:    Matthew Curtis <mcurtis@codeaurora.org>
llvm-svn: 166216

This more accurately reflects what is actually being stored in the
field.

No functionality change intended.

Author:    Matthew Curtis <mcurtis@codeaurora.org>
llvm-svn: 166215

In SimplifySelectOps we pulled two loads through a select node despite the fact that one was dependent on the other.

rdar://12513091

llvm-svn: 166196

The TargetTransform changes are breaking LTO bootstraps of clang.  I am
working with Nadav to figure out the problem, but I am reverting it for now
to get our buildbots working.

This reverts svn commits: 165665 165669 165670 165786 165787 165997
and I have also reverted clang svn 165741

llvm-svn: 166168

- Folding (trunc (concat ... X )) to (concat ... (trunc X) ...) is valid
  when '...' are all 'undef's.
- r166125 relies on this transformation.

llvm-svn: 166155

- In general, it's unsafe for this transformation.

llvm-svn: 166135

- If the extracted vector has the same type of all vectored being concatenated
  together, it should be simplified directly into v_i, where i is the index of
  the element being extracted.

llvm-svn: 166125

This is a more compact, less redundant representation, and it avoids
scanning long lists of aliases for ARM D-registers, for example.

llvm-svn: 166124

any scheduling heuristics nor does it build up any scheduling data structure
that other heuristics use. It essentially linearize by doing a DFA walk but
it does handle glues correctly.

IMPORTANT: it probably can't handle all the physical register dependencies so
it's not suitable for x86. It also doesn't deal with dbg_value nodes right now
so it's definitely is still WIP.

rdar://12474515

llvm-svn: 166122

All callers of these functions really want the isPhysRegOrOverlapUsed()
functionality which also checks aliases. For historical reasons, targets
without register aliases were calling isPhysRegUsed() instead.

Change isPhysRegUsed() to also check aliases, and switch all
isPhysRegOrOverlapUsed() callers to isPhysRegUsed().

llvm-svn: 166117

llvm-svn: 166107

This is just as fast, and it makes it possible to avoid leaking the
UsedPhysRegs BitVector implementation through
MachineRegisterInfo::addPhysRegsUsed().

llvm-svn: 166083

PR14098 contains an example where we would rematerialize a MOV8ri
immediately after the original instruction:

  %vreg7:sub_8bit<def> = MOV8ri 9; GR32_ABCD:%vreg7
  %vreg22:sub_8bit<def> = MOV8ri 9; GR32_ABCD:%vreg7

Besides being pointless, it is also wrong since the original instruction
only redefines part of the register, and the value read by the new
instruction is wrong.

The problem was the LiveRangeEdit::allUsesAvailableAt() didn't
special-case OrigIdx == UseIdx and found the wrong SSA value.

llvm-svn: 166068

A fix for PR14098, including the test case is in the next commit.

llvm-svn: 166067

llvm-svn: 166049

llvm+clang+compiler-rt bootstrap.

llvm-svn: 166046

Stack is formed improperly for long structures passed as byval arguments for
EABI mode.

If we took AAPCS reference, we can found the next statements:

A: "If the argument requires double-word alignment (8-byte), the NCRN (Next
Core Register Number) is rounded up to the next even register number." (5.5
Parameter Passing, Stage C, C.3).

B: "The alignment of an aggregate shall be the alignment of its most-aligned
component." (4.3 Composite Types, 4.3.1 Aggregates).

So if we have structure with doubles (9 double fields) and 3 Core unused
registers (r1, r2, r3): caller should use r2 and r3 registers only.
Currently r1,r2,r3 set is used, but it is invalid.

Callee VA routine should also use r2 and r3 regs only. All is ok here. This
behaviour is guessed by rounding up SP address with ADD+BFC operations.

Fix:
Main fix is in ARMTargetLowering::HandleByVal. If we detected AAPCS mode and
8 byte alignment, we waste odd registers then.

P.S.:
I also improved LDRB_POST_IMM regression test. Since ldrb instruction will
not generated by current regression test after this patch. 

llvm-svn: 166018

This is a medium term workaround until we have a more robust solution
in the form of a register liveness utility for postRA passes.

llvm-svn: 166001

llvm-svn: 165999

Clients can use the equivalent functions in MRI.

llvm-svn: 165990

All callers can simply use the corresponding MRI functions.

llvm-svn: 165985

Using the cached bit vector in MRI avoids comstantly allocating and
recomputing the reserved register bit vector.

llvm-svn: 165983

Also provide an MRI::getReservedRegs() function to access the frozen
register set, and isReserved() and isAllocatable() methods to test
individual registers.

The various implementations of TRI::getReservedRegs() are quite
complicated, and many passes need to look at the reserved register set.
This patch makes it possible for these passes to use the cached copy in
MRI, avoiding a lot of malloc traffic and repeated calculations.

llvm-svn: 165982

Move the Attributes::Builder outside of the Attributes class and into its own class named AttrBuilder. No functionality change.

llvm-svn: 165960

follow in one sec.

llvm-svn: 165951

llvm-svn: 165950

Resubmit the changes to llvm core to update the functions to support different pointer sizes on a per address space basis.

llvm-svn: 165941