Summary: The Hexagon ABI plugin uses hardcoded registers when setting up function calls. This is OK for the Hexagon simulator, but the register numbers are different on the gdbserver running on hardware. Change the hardcoded registers to LLDB generic registers.

Reviewers: clayborg

Subscribers: lldb-commits

Differential Revision: http://reviews.llvm.org/D15457

llvm-svn: 255374

There are going to be two more patches which bring this feature up to date and in line with OpenMP 4.5.

* Renamed jump tables for the lock functions (and some clean up).
* Renamed some macros to be in KMP_ namespace.
* Return type of unset functions changed from void to int.
* Enabled use of _xebgin() et al. intrinsics for accessing TSX instructions.

Differential Revision: http://reviews.llvm.org/D15199

llvm-svn: 255373

The message for a type definition in an "if" condition was different
from the other three for no particular reason.

llvm-svn: 255372

Error on redeclaring with a conflicting asm label and on redeclaring with an asm label after the first ODR-use. Detects problems like the one in PR22830 where gcc and clang both compiled the file but with different behaviour.

llvm-svn: 255371

As noted in http://reviews.llvm.org/D15392 , we should be able to improve this.

llvm-svn: 255370

llvm-svn: 255369

llvm-svn: 255368

(This is part-2 of the patch -- fixing test cases)

Before the patch, -fprofile-instr-generate compile will fail
if no integrated-as is specified when the file contains
any static functions (the -S output is also invalid).

This patch fixed the issue. With the change, the index format
version will be bumped up by 1. Backward compatibility is 
preserved with this change.

Differential Revision: http://reviews.llvm.org/D15243

llvm-svn: 255366

Before the patch, -fprofile-instr-generate compile will fail
if no integrated-as is specified when the file contains
any static functions (the -S output is also invalid).

This patch fixed the issue. With the change, the index format
version will be bumped up by 1. Backward compatibility is 
preserved with this change.

Differential Revision: http://reviews.llvm.org/D15243

llvm-svn: 255365

Fix Clang-tidy modernize-use-nullptr and readability-simplify-boolean-expr warnings in source/Target/Target.cpp.

Simplify smart pointers checks in conditions.

llvm-svn: 255364

llvm-svn: 255363

computeRegisterLiveness() was broken in that it reported dead for a
register even if a subregister was alive. I assume this was because the
results of analayzePhysRegs() are hard to understand with respect to
subregisters.

This commit: Changes the results of analyzePhysRegs (=struct
PhysRegInfo) to be clearly understandable, also renames the fields to
avoid silent breakage of third-party code (and improve the grammar).

Fix all (two) users of computeRegisterLiveness() in llvm: By reenabling
it and removing workarounds for the bug.

This fixes http://llvm.org/PR24535 and http://llvm.org/PR25033

Differential Revision: http://reviews.llvm.org/D15320

llvm-svn: 255362

llvm-svn: 255361

llvm-svn: 255360

These are redundant pairs of nodes defined for
INSERT_VECTOR_ELEMENT/EXTRACT_VECTOR_ELEMENT.
insertelement/extractelement are slightly closer to the corresponding
C++ node name, and has stricter type checking so prefer it.

Update targets to only use these nodes where it is trivial to do so.
AArch64, ARM, and Mips all have various type errors on simple replacement,
so they will need work to fix.

Example from AArch64:

def : Pat<(sext_inreg (vector_extract (v16i8 V128:$Rn), VectorIndexB:$idx), i8),
          (i32 (SMOVvi8to32 V128:$Rn, VectorIndexB:$idx))>;

Which is trying to do sext_inreg i8, i8.

llvm-svn: 255359

and appends them to our list of comments (which can additionally include
things like decoded addresses).

llvm-svn: 255358

There is work under way in llvm to avoid creating unnecessary names for
symbols. This makes lld capable of handling that.

llvm-svn: 255357

Summary:
ADJCALLSTACK{DOWN,UP} (aka CALLSEQ_{START,END}) MIs are supposed to use
and def the stack pointer. Since they do not, all the nodes are being
eliminated by DeadMachineInstructionElim, so they aren't in the IR when
PrologEpilogInserter/eliminateCallFramePseudo needs them.

This change fixes that, but since RegStackify will not stackify across
them (and it runs early, before PEI), change LowerCall to only emit them
when the call frame size is > 0. That makes the current code work the
same way and makes code handled by D15344 also work the same way. We can
expand the condition beyond NumBytes > 0 in the future if needed.

Reviewers: sunfish, jfb

Subscribers: jfb, dschuff, llvm-commits

Differential Revision: http://reviews.llvm.org/D15459

llvm-svn: 255356

This matches the behavior of both gold and bfd ld.

llvm-svn: 255355

Revert "[DSE] Disable non-local DSE to see if the bots go green."
Revert "[DeadStoreElimination] Use range-based loops. NFC."
Revert "[DeadStoreElimination] Add support for non-local DSE."

llvm-svn: 255354

The access function has a short entry and a short exit, the initialization
block is only run the first time. To improve the performance, we want to
have a short frame at the entry and exit.

We explicitly handle most of the CSRs via copies. Only the CSRs that are not
handled via copies will be in CSR_SaveList.

Frame lowering and prologue/epilogue insertion will generate a short frame
in the entry and exit according to CSR_SaveList. The majority of the CSRs will
be handled by register allcoator. Register allocator will try to spill and
reload them in the initialization block.

We add CSRsViaCopy, it will be explicitly handled during lowering.

1> we first set FunctionLoweringInfo->SplitCSR if conditions are met (the target
   supports it for the given calling convention and the function has only return
   exits). We also call TLI->initializeSplitCSR to perform initialization.
2> we call TLI->insertCopiesSplitCSR to insert copies from CSRsViaCopy to
   virtual registers at beginning of the entry block and copies from virtual
   registers to CSRsViaCopy at beginning of the exit blocks.
3> we also need to make sure the explicit copies will not be eliminated.

rdar://problem/23557469

Differential Revision: http://reviews.llvm.org/D15340

llvm-svn: 255353

llvm-svn: 255352

This will be used in a future change to support rerunning flakey tests
that hit a test result isue in a low-load, single worker test runner phase.

This is implemented as an additive-style event rather than being
evaluated and added to the start_test event because the decorator code
only runs after the start_test event is created and sent.  i.e.
LLDBTestResult.startTest() runs before the test method decorators run.

llvm-svn: 255351

Quoting from the comment added to the code:

    // Objective-C on i386 uses artificial absolute symbols to
    // perform some link time checks. Those symbols have a fixed 0
    // address that might conflict with real symbols in the object
    // file. As I cannot see a way for absolute symbols to find
    // their way into the debug information, let's just ignore those.

llvm-svn: 255350

It is reasonable to specify an entry point for shared objects - for
example, for the FreeBSD rtld ld-elf.so.1.

Unlike GNU ld we leave the entry address as 0 if -shared is specified
without -e.

Differential Revision:	http://reviews.llvm.org/D15454

llvm-svn: 255349

GlobalsAA's assumptions that passes do not escape globals not previously
escaped is not violated by AlignmentFromAssumptions and SLPVectorizer. Marking
them as such allows GlobalsAA to be preserved until GVN in the LTO pipeline.

http://lists.llvm.org/pipermail/llvm-dev/2015-December/092972.html

Patch by Vaivaswatha Nagaraj!

llvm-svn: 255348

llvm-svn: 255347

address space unless address space is explicitly specified.

Correct the behavior of NULL constant detection -
generic AS void pointer should be accepted as a valid NULL constant.

http://reviews.llvm.org/D15293

llvm-svn: 255346

This patch enables the safestack for aarch64. The frontend already have
it enabled on all supported architectures and no adjustment is required
in llvm.

The compiler-rt adjustments are basically add on the cmake configuration
to enable the tests and fix the pagesize debug check by getting its
value at runtime (since aarch64 has multiple pagesize depending of
kernel configuration).

llvm-svn: 255345

AsmWriterEmitter will generate a getRegisterName function with an alternate
register name index as its second argument if the target makes use of them. The
enum of these values is generated in RegisterInfoEmitter. The getRegisterName
generator would assume the namespace could always be found by reading index 1
of the list of AltNameIndices, but this will fail if this list is sorted such
that the NoRegAltName is at index 1. Because this list is sorted by record name
(in CodeGenTarget::ReadRegAltNameIndices), you only run in to problems if your
MyTargetRegisterInfo.td defines a single RegAltNameIndex that sorts lexically
before NoRegAltName.

For example, if a target has something like

  def AnAltNameIndex : RegAltNameIndex

and defines RegAltNameIndices for some registers then, prior to this change,
AsmWriterEmitter would generate references to

  ::AnAltNameIndex and ::NoRegAltName

Patch by Alex Bradbury!

llvm-svn: 255344

Reviewed By: reames

Differential Revision: http://reviews.llvm.org/D14097

llvm-svn: 255343

LLDB don't detect the loading of a shared object file linked against the
main executable before the static initializers are executed for the
given module. Because of this it is not possible to get breakpoint hits
in these static initializers and to display proper debug info in case of
a crash in these codes.

llvm-svn: 255342

llvm-svn: 255341

Summary: If six.py is simlink'd, an installation won't be able to find it unless it has access to the source tree that lldb was built from.

Reviewers: zturner

Subscribers: lldb-commits

Differential Revision: http://reviews.llvm.org/D15422

llvm-svn: 255340

llvm-svn: 255339

Adds support for reading a maximum of six integer arguments from a renderscript hook on X86_64.
Author: Luke Drummond <luke.drummond@codeplay.com>

llvm-svn: 255338

address space unless address space is explicitly specified.

Correct the behavior of NULL constant detection -
generic AS void pointer should be accepted as a valid NULL constant.

http://reviews.llvm.org/D15293

llvm-svn: 255337

Mem2Reg shouldn't be optimizing a function that is marked
optnone. There is a test checking this that fails when mem2reg is
explicitly added to the standard pass pipeline.

llvm-svn: 255336

The new test summary formatter does not honor the "expected timeout" markings, which makes our
buildbots all red. I'm switching it off by default until we figure out a way to make this work.

llvm-svn: 255335

MatchBSwap has most of the functionality to match bit reversals already. If we switch it from looking at bytes to individual bits and remove a few early exits, we can extend the main recursive function to match any sequence of ORs, ANDs and shifts that assemble a value from different parts of another, base value. Once we have this bit->bit mapping, we can very simply detect if it is appropriate for a bswap or bitreverse.

llvm-svn: 255334