It includes a pass that rewrites all indirect calls to jumptable functions to pass through these tables.
This also adds backend support for generating the jump-instruction tables on ARM and X86.
Note that since the jumptable attribute creates a second function pointer for a
function, any function marked with jumptable must also be marked with unnamed_addr.
llvm-svn: 210280
The PowerPC vperm (vector permute) instruction is defined
architecturally with a big-endian bias, in that the two input vectors
are assumed to be concatenated "left to right" and the elements of the
combined input vector are assumed to be numbered from "left to right"
(i.e., with element 0 referencing the high-order element). This
definition is unnatural for little-endian code generation.
To facilitate ease of porting, the vec_perm interface is designed to
use natural element ordering, so that elements are numbered according
to little-endian design principles when code is generated for a
little-endian target. The desired semantics can be achieved with the
vperm instruction provided that the two input vector registers are
reversed, and the permute control vector is complemented. The
complementing is performed using an xor with a vector containing all
one bits.
Only the rightmost 5 bits of each element of the permute control
vector are relevant, so it would be possible to complement the vector
with respect to a <16xi8> vector containing all 31s. However, when
the permute control vector is not a constant, using 255 instead has
the advantage that the vec_xor can be recognized during code
generation as a vnor instruction. (Power8 introduces a vnand
instruction which could alternatively be generated.)
The correctness of this code is tested by the new perm.c test added in
a previous patch. I plan to later make the existing ppc32 Altivec
compile-time tests work for ppc64 and ppc64le as well.
llvm-svn: 210279
Summary:
Add hasLocalStorage/hasGlobalStorage matchers for VarDecl nodes.
Update the doc. Also add them to the dynamic registry.
Reviewers: klimek
Subscribers: klimek, cfe-commits
Differential Revision: http://reviews.llvm.org/D4034
llvm-svn: 210278
This patch adds support for pointer types in global named registers variables.
It'll be lowered as a pair of read/write_register and inttoptr/ptrtoint calls.
Also adds some early checks on types on SemaDecl to avoid the assert.
Tests changed accordingly. (PR19837)
llvm-svn: 210274
Tests $Z0 and $z0. Extends test exe get-code-address-hex:
to take a function name.
Enabled for debugserver, disabled for llgs. Implementing
in llgs branch next.
llvm-svn: 210272
This is a preliminary patch for the PowerPC64LE support. In stage 1
of the vector support, we will support the VMX (Altivec) instruction
set, but will not yet support the VSX instructions. This is merely a
staging issue to provide functional vector support as soon as
possible.
llvm-svn: 210271
Summary: The Linux Kernel is one example of a piece of software that relies on them.
Reviewers: atanasyan
Reviewed By: atanasyan
Differential Revision: http://reviews.llvm.org/D3756
llvm-svn: 210270
Summary:
Move the 'const' in the AST_*MATCHER_P* macros to the right of ParamType to
avoiad applying the constness on the wrong level when ParamType is a pointer.
Change equalsNode() to explicitly accept 'const Decl*' or 'const Stmt*'.
Reviewers: klimek
Subscribers: klimek, cfe-commits
Differential Revision: http://reviews.llvm.org/D3994
llvm-svn: 210269
Use caller pc of __sanitizer_cov_module_init to figure out
when 2 sequential calls are from the same module; skip
.sancov.map file update in this case.
llvm-svn: 210267
When not optimizing, do not run the IfConverter pass, this makes
debugging more difficult (and causes a testsuite failure in
DebugInfo/unconditional-branch.ll).
llvm-svn: 210263
* Move the instruction that changes sp outside of the branch delay slot.
* Bundle-align the target of indirect branch.
Differential Revision: http://llvm-reviews.chandlerc.com/D3928
llvm-svn: 210262
Summary:
This patch makes it possible for clang-tidy clients to provide
different options for different translation units. The option, which doesn't
make sense to be file-dependent, was moved to a separate ClangTidyGlobalOptions
struct. Added parsing of ClangTidyOptions.
Reviewers: klimek
Reviewed By: klimek
Subscribers: cfe-commits
Differential Revision: http://reviews.llvm.org/D3979
llvm-svn: 210260
This sound like a good idea in general.
Also, without this on Android we get add_lit_testsuite() with empty DEPENDS
list, and it does not work well.
llvm-svn: 210257
isCoalescedAway(x) is faster than replacement(x) != x as the former
does not follow the replacement atom chain. Also it's easier to use.
llvm-svn: 210242
COFF supports a feature similar to ELF's section groups. This
patch implements it.
In ELF, section groups are identified by their names, and they are
treated somewhat differently from regular symbols. In COFF, the
feature is realized in a more straightforward way. A section can
have an annotation saying "if Nth section is linked, link this
section too."
Implementing such feature is easy. We can add a reference from a
target atom to an original atom, so that if the target is linked,
the original atom is also linked. If not linked, both will be
dead-stripped. So they are treated as a group.
I added a new reference type, kindAssociate. It does nothing except
preventing referenced atoms from being dead-stripped.
No change to the Resolver is needed.
Reviewers: Bigcheese, shankarke, atanasyan
Subscribers: llvm-commits
Differential Revision: http://reviews.llvm.org/D3946
llvm-svn: 210240
Unused arguments were not being added to the argument list, but instead
treated as arbitrary scope variables. This meant they weren't carefully
added in the original argument order.
In this particular example, though, it turns out the argument is only
/mostly/ unused (well, actually it's entirely used, but in a specific
way). It's a struct that, due to ABI reasons, is decomposed into chunks
(exactly one chunk, since it has one member) and then passed. Since only
one of those chunks is used (SROA, etc, kill the original reconstitution
code) we don't have a location to describe the whole variable.
In this particular case, since the struct consists of just the one int,
once we have partial location information, this should have a location
that describes the entire variable (since the piece is the entirety of
the object).
And at some point we'll need to describe the location of even /entirely/
unused arguments so that they can at least be printed on function entry.
llvm-svn: 210231
Due to what can only be described as a CRT bug, stdout and amazingly
even stderr are not always flushed upon process termination, especially
when the system is under high threading pressure. I have found two
repros for this:
1) In lib\Support\Threading.cpp, change sys::Mutex to an
std::recursive_mutex and run check-clang. Usually between 30 and 40
tests will fail.
2) Add OutputDebugStrings in code that runs during static initialization
and static shutdown. This will sometimes generate similar failures.
After a substantial amount of troubleshooting and debugging, I found
that I could reproduce this from the command line without running
check-clang. Simply make the mutex change described in #1, then
manually run the following command many times by running it once, then
pressing Up -> Enter very quickly:
D:\src\llvm\build\vs2013\Debug\bin\c-index-test.EXE -cursor-at=D:\src\llvm\tools\clang\test\Index\targeted-preamble.h:2:15 D:\src\llvm\tools\clang\test\Index\targeted-cursor.c -include D:\src\llvm\build\vs2013\tools\clang\test\Index\Output\targeted-cursor.c.tmp.h -Xclang -error-on-deserialized-decl=NestedVar1 -Xclang -error-on-deserialized-decl=TopVar | D:\src\llvm\build\vs2013\Debug\bin\FileCheck.EXE D:\src\llvm\tools\clang\test\Index\targeted-cursor.c -check-prefix=PREAMBLE-CURSOR1
Sporadically they will fail, and attaching a debugger to a failed
instance indicates that stdin of FileCheck.exe is empty.
Note that due to the repro in #2, we can rule out a bug in the STL's
mutex implementation, and instead conclude that this is a real flake in
the windows test harness.
Test Plan:
Without patch: Ran check-clang 10 times and saw over 30 Unexpected failures on every run.
With patch: Ran check-clang 10 times and saw 0 unexpected failures across all runs.
Reviewers: rnk
Differential Revision: http://reviews.llvm.org/D4021
Patch by Zachary Turner!
llvm-svn: 210225
Tom Roeder