libunwind in all cases when installed.
At the time, Clang's unwind.h didn't provide huge chunks of the
LSB-specified unwind interface, and was generally too aenemic to use for
real software. However, it has since then become a strict superset of
the APIs provided by libunwind on Linux. Notably, you cannot compile
llgo's libgo library against libunwind, but you can against Clang's
unwind.h. So let's just use our header. =] I've checked pretty
thoroughly for any incompatibilities, and I am not aware of any.
An open question is whether or not we should continue to munge
GNU_SOURCE here. I didn't touch that as it potentially has compatibility
implications on systems I cannot easily test -- Darwin. If a Darwin
maintainer can verify that this is in fact unnecessary and remove it,
cool. Until then, leaving it in makes this change a no-op there, and
only really relevant on Linux systems where it is pretty clearly the
right way to go.
llvm-svn: 224934
necessary to be fully compatible with existing software that calls into
the linux unwind code. You can find documentation of this API and why it
exists in the discussion abot NPTL here:
https://gcc.gnu.org/ml/gcc-patches/2003-09/msg00154.html
llvm-svn: 224933
variable (now provided both by the normal parent LLVM CMake files and by
the LLVMConfig.cmake file used by the standalone build).
This allows LLDB to build into and install into correctly suffixed
libdirs. This is especially significant for LLDB because the python
extension building done by CMake directly uses multilib suffixes when
the host OS does, and the host OS will not always look back and forth
between them. As a consequence, before LLVM, Clang, and LLDB (and every
other subproject) had support for using LLVM_LIBDIR_SUFFIX, you couldn't
build or install LLDB on a multilib system with its python extensions
enabled. With this patch (on top of all the others I have submitted
throughout the project), I'm finally able to build and install LLDB on
my system with Python support enabled. I'm also able to actually run the
LLDB test suite, etc. Now, a *huge* number of the tests still fail on my
Linux system, but hey, actually running them and them testing the
debugger is a huge step forward. =D
llvm-svn: 224930
the same way the LLVM CMake build does, notably using the proper CMake
module and specifically requesting an older Python version. LLDB relies
pretty heavily on not using Python 3 at this point, and without this
patch it ends up trying to use Python 3 which ends quite badly. =] With
this, I'm able to build LLDB in its standalone mode successfully on
Linux when I have both Python 2.7 and Python 3.3 installed.
llvm-svn: 224929
LLVM_LIBDIR_SUFFIX variable to one place in the cmake file.
This is all that I had to do to get everything from compiler-rt working
for me, but there may be more work required if folks are relying on more
parts of compiler-rt. Notably, I'm mostly using it for the sanitizers.
llvm-svn: 224928
libdir suffixes like 'lib64' or 'lib32'.
This support is currently very rhudimentary. We define a variable
LIBCXXABI_LIBDIR_SUFFIX. In a standalone build of libc++abi this can be
directly set as a cached variable to control the multilib suffix used.
When building libc++abi within a larger LLVM build, it is hard wired to
whatever LLVM libdir suffix has been selected. If this doesn't work for
someone, just let me know. I'm happy to change it.
Unfortunately, libc++abi's lit setup made this somewhat problematic to
change. It was setting variables up in a way that caused the resulting
build to not work with lit at all. To fix that, I've moved some
variables around in the CMake build to more closely match where and how
they are defined in the libc++ CMake build. This includes specifically
defining a library root variable in the CMake build where the libdir
suffix can be applied, and then using that rather than re-computing it
from the object directory in the lit config.
This is essentially new functionality for libc++abi so I don't expect it
to have any impact for folks until they start setting these variables.
However, I know libc++abi is built in a diverse set of environments so
just let me know if this causes you any problems.
llvm-svn: 224927
suffixes like 'lib64' or 'lib32'.
This support is currently very rhudimentary. We define a variable
LIBCXX_LIBDIR_SUFFIX. In a standalone build of libc++ this can be
directly set as a cached variable to control the multilib suffix used.
When building libc++ within a larger LLVM build, it is hard wired to
whatever LLVM libdir suffix has been selected. If this doesn't work for
someone, just let me know. I'm happy to change it.
This is essentially new functionality for libc++ so I don't expect it to
have any impact for folks until they start setting these variables.
However, I know libc++ is built in a diverse set of environments so just
let me know if this causes you any problems.
llvm-svn: 224926
allows it to support multilib suffixed hosts using lib64, etc. This
variable is now available both in the direct LLVM build and from the
LLVMConfig.cmake file used by standalone builds.
llvm-svn: 224925
a CLANG_LIBDIR_SUFFIX down from the build system and using that as part
of the default resource dir computation.
Without this, essentially nothing that uses the clang driver works when
building clang with a libdir suffix. This is probably the single biggest
missing piece of support for multilib as without this people could hack
clang to end up installed in the correct location, but it would then
fail to find its own basic resources. I know of at least one distro that
has some variation on this patch to hack around this; hopefully they'll
be able to use the libdir suffix functionality directly as the rest of
these bits land.
This required fixing a copy of the code to compute Clang's resource
directory that is buried inside of the frontend (!!!). It had bitrotted
significantly relative to the driver code. I've made it essentially
a clone of the driver code in order to keep tests (which use cc1
heavily) passing. This copy should probably just be removed and the
frontend taught to always rely on an explicit resource directory from
the driver, but that is a much more invasive change for another day.
I've also updated one test which actually encoded the resource directory
in its checked output to tolerate multilib suffixes.
Note that this relies on a prior LLVM commit to add a stub to the
autoconf build system for this variable.
llvm-svn: 224924
'lib' directories in the build. This variable is available now both as
part of the normal LLVM build an as part of a standalone build as I've
added it to the LLVMConfig.cmake output.
With this change we should at least put libraries into the multilib
directory correctly. It is the first step in getting Clang to be
reasonably multilib aware.
llvm-svn: 224923
a CLANG_LIBDIR_SUFFIX variable. This is necessary before I can add
support for using that variable to CMake and the C++ code in Clang, and
the autoconf build system does all substitutions in the LLVM tree.
As mentioned before, I'm not planning to add actual multilib support to
the autoconf build, just enough stubs for it to keep playing nicely with
the CMake build once that one has support.
llvm-svn: 224922
For this to work, we have to encode it in the build variables and use it
from llvm-config.cpp. I've tried to do this reasonably cleanly, but the
code for llvm-config.cpp is pretty strange. However, with this,
llvm-config stops giving the wrong answer when using LLVM_LIBDIR_SUFFIX.
Note that the configure+make build just sets this to an empty string as
that build system has zero support for multilib of any form. I'm not
planning to add support there either, but this should leave a path for
anyone that wanted to.
llvm-svn: 224921
that is used by other projects to build against LLVM. This will allow
subsequent patches to them to use LLVM_LIBDIR_SUFFIX, both when built as
part of the larger LLVM build an as part of a standalone build against
an installed set of LLVM libraries.
llvm-svn: 224920
*numerous* places where it was missing in the CMake build. The primary
change here is that the suffix is now actually used for all of the lib
directories in the LLVM project's CMake. The various subprojects still
need similar treatment.
This is the first of a series of commits to try to make LLVM's cmake
effective in a multilib Linux installation. I don't think many people
are seriously using this variable so I'm hoping the fallout will be
minimal. A somewhat unfortunate consequence of the nature of these
commits is that until I land all of them, they will in part make the
brokenness of our multilib support more apparant. At the end, things
should actually work.
llvm-svn: 224919
GCC permits array l-values in asm output operands even though they
aren't modifiable l-values. We used to permit it but this behavior
regressed in r224916.
llvm-svn: 224918
Functions are l-values in C++ but shouldn't be available as output
parameters in inline assembly. Neither should overloaded function
l-values.
This fixes PR21949.
llvm-svn: 224916
r168626 added nicer diagnostics for attributes in the wrong places, such as
after the `final` on a class. To do this, it added code that did high-level
pattern matching for e.g. 'final' 'alignas' '(' and then skipped until the
closing ')'. If it saw that, it then went down the regular class parsing
path and then called MaybeParseCXX11Attributes() to parse the attribute after
the 'final' using real attribute parsing code. On invalid attributes, the
real attribute parsing code could eat more tokens than the pattern matching
code and for example skip past the '{' starting the class, which would then
lead to an assert. To prevent this, check for a good state after calling
MaybeParseCXX11Attributes() (which morphed into CheckMisplacedCXX11Attribute()
in r175575) and bail out if things look bleak.
Found by SLi's afl bot.
llvm-svn: 224915
hasDeclaratorForAnonDecl, getDeclaratorForAnonDecl and
getTypedefNameForAnonDecl are expected to handle the case where
NamedDeclOrQualifier holds the wrong type or nothing at all.
llvm-svn: 224912
The change in r224819 started using internal_unlink in a sanitizer_common unit test. For some reason, internal_unlink is not defined in sanitizer_mac.cc, fixing that.
llvm-svn: 224910
Clang has a hack to accept definitions of structs with tag names which
have the same name as intrinsics. However, this hack didn't guard
against annotation tokens showing up in the token stream.
llvm-svn: 224909
Create an ConstantAggregateZero upfront if we see that it is viable.
This saves us from having to manually push_back each and every
initializer and then looping back over them to determine if they are
'null'.
llvm-svn: 224908
Fixes this snippet from SLi's afl fuzzer output:
class {
i (x = <, enum
This parsed i as a function, x as a paramter, and the stuff after < as a
template list. This then called TryConsumeDeclarationSpecifier() which
called TryAnnotateCXXScopeToken() without checking the preconditions of
this function. Check them before calling, like all other callers of
TryAnnotateCXXScopeToken() do.
A more readable reproducer that causes the same crash is
class {
void i(int x = MyTemplateClass<int, union int>::foo());
};
The reduced version used an eof token as surprising token, but kw_int works
just as well to repro and is easier to insert into a test file.
llvm-svn: 224906
isDeclarationSpecifier performs error recovers which jostles the token
stream. Specifically, TryAnnotateTypeOrScopeToken will end up consuming
a typename token which will confuse the attribute parsing machinery as
we no-longer have something identifier-like.
llvm-svn: 224903
The else case ResultReg was not checked for validity.
To my surprise, this case was not hit in any of the
existing test cases. This includes a new test cases
that tests this path.
Also drop the `target triple` declaration from the
original test as suggested by H.J. Lu, because
apparently with it the test won't be run on Linux
llvm-svn: 224901
If the control flow is modelling an if-statement where the only instruction in
the 'then' basic block (excluding the terminator) is a call to cttz/ctlz,
CodeGenPrepare can try to speculate the cttz/ctlz call and simplify the control
flow graph.
Example:
\code
entry:
%cmp = icmp eq i64 %val, 0
br i1 %cmp, label %end.bb, label %then.bb
then.bb:
%c = tail call i64 @llvm.cttz.i64(i64 %val, i1 true)
br label %end.bb
end.bb:
%cond = phi i64 [ %c, %then.bb ], [ 64, %entry]
\code
In this example, basic block %then.bb is taken if value %val is not zero.
Also, the phi node in %end.bb would propagate the size-of in bits of %val
only if %val is equal to zero.
With this patch, CodeGenPrepare will try to hoist the call to cttz from %then.bb
into basic block %entry only if cttz is cheap to speculate for the target.
Added two new hooks in TargetLowering.h to let targets customize the behavior
(i.e. decide whether it is cheap or not to speculate calls to cttz/ctlz). The
two new methods are 'isCheapToSpeculateCtlz' and 'isCheapToSpeculateCttz'.
By default, both methods return 'false'.
On X86, method 'isCheapToSpeculateCtlz' returns true only if the target has
LZCNT. Method 'isCheapToSpeculateCttz' only returns true if the target has BMI.
Differential Revision: http://reviews.llvm.org/D6728
llvm-svn: 224899
We expected the type of a TagDecl to be a TagType, not an
InjectedClassNameType. Introduced a helper method, Type::getAsTagDecl,
to abstract away the difference; redefine Type::getAsCXXRecordDecl to be
in terms of it.
llvm-svn: 224898
Masked vector intrinsics are a part of common LLVM IR, but they are really supported on AVX2 and AVX-512 targets. I added a code that translates masked intrinsic for all other targets. The masked vector intrinsic is converted to a chain of scalar operations inside conditional basic blocks.
http://reviews.llvm.org/D6436
llvm-svn: 224897
We'd let annotation tokens from '#pragma pack' and the like get inside a
function-like macro. This would lead to terror and mayhem; stop the
madness early.
This fixes PR22037.
llvm-svn: 224896
I'd be interested if the paragraph on Parse not knowing much about AST is
something folks agree with. I think this used to be true after rjmccall removed
the Action interface in r112244 and I believe it's still true, but I'm not sure.
(For example, ParseOpenMP.cpp does include AST/StmtOpenMP.h. Other than that,
Parse not using AST nodes much seems to be still true, though.)
llvm-svn: 224894
This fixes PR21587, what r221933 fixed for regular programs is now also
fixed for decls coming from PCH files.
Use another bit from the count/bits uint16_t for storing the "more than one
decl" bit. This reduces the number of bits for the count from 14 to 13.
The selector with the most overloads in Cocoa.h has ~55 overloads, so 13 bits
should still be plenty. Since this changes the meaning of a serialized bit
pattern, also increase clang::serialization::VERSION_MAJOR.
Storing the "more than one decl" state of only the first overload isn't quite
correct, but Sema::AreMultipleMethodsInGlobalPool() currently only looks at
the state of the first overload so it's good enough for now.
llvm-svn: 224892
Determining the address of a TLS variable results in a function call in
certain TLS models. This means that a simple ICmpInst might actually
result in invalidating the CTR register.
In such cases, do not attempt to rely on the CTR register for loop
optimization purposes.
This fixes PR22034.
Differential Revision: http://reviews.llvm.org/D6786
llvm-svn: 224890
Rafael Espindola