David Majnemer [Tue, 17 Mar 2015 20:35:05 +0000 (20:35 +0000)]
MS ABI: Emit HandlerMap entries for C++ catch
The HandlerMap describes, to the runtime, what sort of catches surround
the try. In principle, this structure has to be emitted by the backend
because only it knows the layout of the stack (the runtime needs to know
where on the stack the destination of a copy lives, etc.) but there is
some C++ specific information that the backend can't reason about.
Stick this information in special LLVM globals with the relevant
"const", "volatile", "reference" info mangled into the name.
Renato Golin [Tue, 17 Mar 2015 11:55:43 +0000 (11:55 +0000)]
[ARM] Add support for ARMV6K subtarget (Clang)
ARMv6K is another layer between ARMV6 and ARMV6T2. This is the Clang
side of the changes.
ARMV6 family LLVM implementation.
+-------------------------------------+
| ARMV6 |
+----------------+--------------------+
| ARMV6M (thumb) | ARMV6K (arm,thumb) | <- From ARMV6K and ARMV6M processors
+----------------+--------------------+ have support for hint instructions
| ARMV6T2 (arm,thumb,thumb2) | (SEV/WFE/WFI/NOP/YIELD). They can
+-------------------------------------+ be either real or default to NOP.
| ARMV7 (arm,thumb,thumb2) | The two processors also use
+-------------------------------------+ different encoding for them.
Richard Smith [Tue, 17 Mar 2015 02:23:11 +0000 (02:23 +0000)]
[modules] Fix bug where an anonymous namespace could cause the containing
namespace to not merge properly.
We have an invariant here: after a declaration reads its canonical declaration,
it can assume the canonical declaration is fully merged. This invariant can be
violated if deserializing some declaration triggers the deserialization of a
later declaration, because that later declaration can in turn deserialize a
redeclaration of that first declaration before it is fully merged.
The anonymous namespace for a namespace gets stored with the first declaration
of that namespace, which may be before its parent namespace, so defer loading
it until after we've finished merging the surrounding namespace.
CodeGenCXX: Test that linetables work with variadic virtual thunks
Add a frontend test for PR22929, which was fixed by LLVM r232449.
Besides the crash test, check that the `!dbg` attachment is sane since
its presence was the trigger.
Justin Bogner [Mon, 16 Mar 2015 23:52:21 +0000 (23:52 +0000)]
GCOV: Expose the -coverage-exit-block-before-body flag in clang -cc1
This exposes the optional exit block placement logic from r232438 as a
clang -cc1 option. There is a test on the llvm side, but there isn't
really a way to inspect the gcov options from clang to test it here as
well.
Richard Smith [Mon, 16 Mar 2015 20:54:07 +0000 (20:54 +0000)]
[modules] If we find more formerly-canonical declarations of an entity while
building its redecl chains, make sure we pull in the redeclarations of those
canonical declarations.
It's pretty difficult to reach a situation where we can find more canonical
declarations of an entity while building its redecl chains; I think the
provided testcase (4 modules and 7 declarations) cannot be reduced further.
Global inline assembler blocks are merged before parsing, so no specific
location data is available. If pragma handling wants to look up the
position, it finds the LLVM buffer and wants to compare it with the
special built-in buffer, failing badly. Extend to the special handling
of the built-in buffer to also check for the inline asm buffer. Expect
only a single asm buffer. Sort it between the built-in buffers and the
normal file buffers.
Benjamin Kramer [Sun, 15 Mar 2015 15:27:19 +0000 (15:27 +0000)]
Implement PreprocessingRecord's and LazyVector's iterators on top of iterator_adaptor_base
This basically creates a wrapper around an 'int' that poses as an iterator.
While that looks a bit counter-intuitive it works just fine because iterator
operations and basic integer arithmetic works in exactly the same way.
Remove the manual integer wrapping code and reduce the reliance on iterator
internals in the implementation. No functionality change intended.
Daniel Jasper [Sun, 15 Mar 2015 13:55:54 +0000 (13:55 +0000)]
clang-format: [JS] more precisely detect enums.
The current enum detection is overly aggressive. As NestingLevel only
applies per line (?) it classifies many if not most object literals as
enum declarations and adds superfluous line breaks into them. This
change narrows the heuristic by requiring an assignment just before the
open brace and requiring the line to start with an identifier.
David Majnemer [Sun, 15 Mar 2015 07:10:01 +0000 (07:10 +0000)]
MS ABI: Don't use qualified pointee types for 'catch' EH TypeDescriptors
Qualifiers are located next to the TypeDescriptor in order to properly
ensure that a pointer type can only be caught by a more qualified catch
handler. This means that a catch handler of type 'const int *' requires
an RTTI object for 'int *'. We got this correct for 'throw' but not for
'catch'.
N.B. We don't currently have the means to store the qualifiers because
LLVM's EH strategy is tailored to the Itanium scheme. The Itanium ABI
stores qualifiers inside the type descriptor in such a way that the
manner of qualification is stored in addition to the pointee type's
descriptor. Perhaps the best way of modeling this for the MS ABI is
using an aggregate type to bundle the qualifiers with the descriptor?
This is tricky because we want to make it clear to the optimization
passes which catch handlers invalidate other handlers.
My current thoughts on a design for this is along the lines of:
{ { TypeDescriptor* TD, i32 QualifierFlags }, i32 MiscFlags }
The idea is that the inner most aggregate is all that is needed to
communicate that one catch handler might supercede another. The
'MiscFlags' field would be used to hold the bitpattern for the notion
that the 'catch' handler does not need to invoke a copy-constructor
because we are catching by reference.
David Majnemer [Sat, 14 Mar 2015 22:24:38 +0000 (22:24 +0000)]
CodeGen: Correctly initialize bitfields with non-constant initializers
It is possible to construct an initializer for a bitfield which is not
constant. Instead of emitting code to initialize the field before the
execution of main, clang would crash.
Benjamin Kramer [Sat, 14 Mar 2015 12:39:22 +0000 (12:39 +0000)]
[analyzer] Sort path diagnostics with array_pod_sort.
They're expensive to compare and we won't sort many of them so std::sort
doesn't give any benefits and causes code bloat. Func fact: clang -O3 didn't
even bother to inline libc++'s std::sort here.
While there validate the predicate a bit harder, the sort is unstable and we
don't want to introduce any non-determinism. I had to spell out the function
pointer type because GCC 4.7 still fails to convert the lambda to a function
pointer :(
David Majnemer [Sat, 14 Mar 2015 06:34:41 +0000 (06:34 +0000)]
MS ABI: Mangle virtual member pointer thunks with the correct CC
Virtual member pointers are implemented using a thunk. We assumed that
the calling convention for this thunk was always __thiscall for 32-bit
targets and __cdecl for 64-bit targets. However, this is not the case.
Mangle in whichever calling convention is appropriate for this member
function thunk.
Chandler Carruth [Sat, 14 Mar 2015 04:47:43 +0000 (04:47 +0000)]
[modules] Teach the AST reader to handle the case of importing a module
with a subset of the existing target CPU features or mismatched CPU
names.
While we can't check that the CPU name used to build the module will end
up being able to codegen correctly for the translation unit, we actually
check that the imported features are a subset of the existing features.
While here, rewrite the code to use std::set_difference and have it
diagnose all of the differences found.
Test case added which walks the set relationships and ensures we
diagnose all the right cases and accept the others.
No functional change for implicit modules here, just better diagnostics.
Implement bad cast checks using control flow integrity information.
This scheme checks that pointer and lvalue casts are made to an object of
the correct dynamic type; that is, the dynamic type of the object must be
a derived class of the pointee type of the cast. The checks are currently
only introduced where the class being casted to is a polymorphic class.
David Majnemer [Fri, 13 Mar 2015 22:36:55 +0000 (22:36 +0000)]
MS ABI: Generate default constructor closures
The MS ABI utilizes a compiler generated function called the "vector
constructor iterator" to construct arrays of objects with
non-trivial constructors/destructors. For this to work, the constructor
must follow a specific calling convention. A thunk must be created if
the default constructor has default arguments, is variadic or is
otherwise incompatible. This thunk is called the default constructor
closure.
N.B. Default constructor closures are only generated if the default
constructor is exported because clang itself does not utilize vector
constructor iterators. Failing to export the default constructor
closure will result in link/load failure if a translation unit compiled
with MSVC is on the import side.
Benjamin Kramer [Fri, 13 Mar 2015 16:10:42 +0000 (16:10 +0000)]
Sema: Replace the SetVector/DenseMap/std::sort combination with a simple std::map
This guarantees the order and doesn't increase malloc counts a lot as there are
typically very few elements int the map. Provide a little iterator adapter to
keep the same interface as we had with the flat sorted list.
Chandler Carruth [Fri, 13 Mar 2015 08:29:54 +0000 (08:29 +0000)]
[Modules] Teach Clang to survive ambiguous macros which come from system
headers even if they arrived when merging non-system modules.
The idea of this code is that we don't want to warn the user about
macros defined multiple times by their system headers with slightly
different definitions. We should have this behavior if either the
macro comes from a system module, or the definition within the module
comes from a system header. Previously, we would warn on ambiguous
macros being merged when they came from a users modules even though they
only showed up via system headers.
By surviving this we can handle common system header macro differences
like differing 'const' qualification of pointers due to some headers
predating 'const' being valid in C code, even when those systems headers
are pre-built into a system module.
Benjamin Kramer [Thu, 12 Mar 2015 23:41:40 +0000 (23:41 +0000)]
CodeGen: Base the conditional cleanup machinery on variadic templates
This is complicated by the fact that we can't simply use side-effecting
calls in an argument list without losing all guarantees about the order
they're emitted. To keep things deterministic we use tuples and brace
initialization, which thankfully guarantees evaluation order.
David Majnemer [Thu, 12 Mar 2015 17:44:49 +0000 (17:44 +0000)]
MS ABI: Allow a nullptr_t exception to be caught by void * catch handler
A nullptr exception object can be caught by any pointer type catch
handler. However, it is not possible to express this in the exception
info for the MS ABI. As a middle ground, allow such exception objects
to be caught with pointer-to-void catch handlers.
Logan Chien [Thu, 12 Mar 2015 17:27:53 +0000 (17:27 +0000)]
[docs] Update the doxygen configuration file.
Update the doxygen configuration file and the Makefile build rules
to provide better output (simply use the default stylesheet and template
from the Doxygen distribution.)
This CL has upgrade doxygen.cfg.in to Doxygen 1.8.6.
Benjamin Kramer [Thu, 12 Mar 2015 16:25:19 +0000 (16:25 +0000)]
ASTMatchers: Add an explicit dependency on libclangBasic.
In a static build the dependency is picked up implictly, but not in a shared
library build. This is needed for the new ObjC matchers that reference Selector.
Manuel Klimek [Thu, 12 Mar 2015 15:48:15 +0000 (15:48 +0000)]
Add support for a few Objective-C matchers.
Add some matchers for Objective-C selectors and messages to
ASTMatchers.h. Minor mods to ASTMatchersTest.h to allow test files with
".m" extension in addition to ".cpp". New tests added to
ASTMatchersTest.c.
Benjamin Kramer [Thu, 12 Mar 2015 14:28:47 +0000 (14:28 +0000)]
Sema: Don't emit a missing prototype warning for deleted functions.
This is a bit more involved than I anticipated, so here's a breakdown
of the changes:
1. Call ActOnFinishFunctionBody _after_ we parsed =default and
=delete specifiers. Saying that we finished the body before parsing
=default is just wrong. Changing this allows us to use isDefaulted
and isDeleted on a decl in ActOnFinishFunctionBody.
2. Check for -Wmissing-prototypes after we parsed the function body.
3. Disable -Wmissing-prototypes when the Decl isDeleted.
Benjamin Kramer [Thu, 12 Mar 2015 14:28:38 +0000 (14:28 +0000)]
Use Sema's PrintingPolicy when diagnosing DeclSpecs.
Sema overrides ASTContext's policy on the first emitted diagnostic
(doesn't matter if it's ignored or not). This means changing the order
of diagnostic emission in Sema suddenly changes the text of diagnostic
emitted from the parser.
In the test case -Wmissing-prototypes (ignored) was the culprit, use
'int main' to suppress that warning so we see when this regresses.
Also move it into Sema/ as it's not testing any C++.
Aaron Ballman [Thu, 12 Mar 2015 14:14:48 +0000 (14:14 +0000)]
Reverting r232034, as it broke one of the bots with link errors. Details at: http://bb.pgr.jp/builders/ninja-clang-x64-mingw64-RA/builds/6352/steps/build/logs/stdio
Aaron Ballman [Thu, 12 Mar 2015 13:49:45 +0000 (13:49 +0000)]
Instead of dereferencing std::vector::end() (which is UB and causes failed assertions in debug builds with Visual Studio), use data() + size() to calculate the end iterator. Amends r231952.
Aaron Ballman [Thu, 12 Mar 2015 13:21:19 +0000 (13:21 +0000)]
Added some matchers for objective c selectors and messages to ASTMatchers.h. Minor mods to ASTMatchersTest.h to allow test files with ".m" extension in addition to ".cpp". New tests added to ASTMatchersTest.c.
Patch by Dean Sutherland, reviewed by Manuel Klimek. From http://reviews.llvm.org/D7710
Alexey Bataev [Thu, 12 Mar 2015 08:53:29 +0000 (08:53 +0000)]
[OPENMP] Initial codegen for 'omp sections' and 'omp section' directives.
If only one section is found in the sections region, it is emitted just like single region.
Otherwise it is emitted as a static non-chunked loop.
#pragma omp sections
{
#pragma omp section
{1}
...
#pragma omp section
{n}
}
is translated to something like
Justin Bogner [Thu, 12 Mar 2015 00:52:56 +0000 (00:52 +0000)]
Driver: Keep -isysroot flags in crash scripts if we're dumping a VFS
For crashes with a VFS (ie, with modules), the -isysroot flag is often
necessary to reproduce the crash. This is especially true if some
modules need to be rebuilt, since without the sysroot they'll try to
read headers that are outside of the VFS.
I find it likely that we should keep some of the other -i flags in
this case as well, but I haven't seen that come up in practice yet so
it seems better to be conservative.
Justin Bogner [Thu, 12 Mar 2015 00:14:35 +0000 (00:14 +0000)]
Driver: Print the clang version and original command in crash scripts
When a crash report script doesn't work for a reproduction on your
machine for one reason or another, it can be really tricky to figure
out why not. The compiler version that crashed and the original
command line before stripping flags are very helpful when this comes
up.
Hal Finkel [Wed, 11 Mar 2015 19:14:15 +0000 (19:14 +0000)]
[PowerPC] ABI support for the QPX vector instruction set
Support for the QPX vector instruction set, used on the IBM BG/Q supercomputer,
has recently been added to the LLVM PowerPC backend. This vector instruction
set requires some ABI modifications because the ABI on the BG/Q expects
<4 x double> vectors to be provided with 32-byte stack alignment, and to be
handled as native vector types (similar to how Altivec vectors are handled on
mainline PPC systems). I've named this ABI variant elfv1-qpx, have made this
the default ABI when QPX is supported, and have updated the ABI handling code
to provide QPX vectors with the correct stack alignment and associated
register-assignment logic.
David Majnemer [Wed, 11 Mar 2015 18:36:39 +0000 (18:36 +0000)]
MS ABI: Implement copy-ctor closures, finish implementing throw
This adds support for copy-constructor closures. These are generated
when the C++ runtime has to call a copy-constructor with a particular
calling convention or with default arguments substituted in to the call.
Because the runtime has no mechanism to call the function with a
different calling convention or know-how to evaluate the default
arguments at run-time, we create a thunk which will do all the
appropriate work and package it in a way the runtime can use.
Richard Smith [Wed, 11 Mar 2015 18:21:02 +0000 (18:21 +0000)]
[modules] When merging the pattern of a class template definition into a prior
definition, be sure to update the definition data on all declarations, not just
the canonical one, since the pattern might not be in the list of pending
definitions (if it used to be canonical itself).
One-line fix by me; reduced testcase by Daniel Jasper!
Ed Schouten [Wed, 11 Mar 2015 08:46:01 +0000 (08:46 +0000)]
Fix up default header paths for CloudABI.
CloudABI is a pure cross compilation target. This means that we should
not add /usr/include and /usr/local/include. Instead, headers are stored
in $sysroot/$triple/include.
The method of going back to the sysroot (by using "../../..") is also
used in this function for some of the other environments (e.g., MinGW).
Ed Schouten [Wed, 11 Mar 2015 08:42:46 +0000 (08:42 +0000)]
Add target information for CloudABI on x86-64.
CloudABI can be identified by the __CloudABI__ preprocessor definition. The
system uses ELF executables.
CloudABI uses Unicode 7.0.0 for the encoding of wchar_t. As Unicode 7.0.0 is
synchronized with ISO/IEC 10646:2012 (released on 2012-06-01),
__STDC_ISO_10646__ is defined as 201206L.
projects / clang / log