The only useful loop unrolling flag to give realistically is
'-fno-unroll-loops'. The option to the backend is even called
'DisableUnrollLoops'. This is precisely the form that Clang *didn't*
support. We didn't recognize the flag, we didn't pass it to the CC1
layer, and even if we did we wouldn't use it. Clang only inspected the
positive form of the flag, and only did so to enable loop unrolling when
the optimization level wasn't high enough. This only occurs for an
optimization level that even has a chance of running the loop unroller
when optimizing for size.
This commit wires up the 'no' variant, and switches the code to actually
follow the standard flag pattern of using the last flag and allowing
a flag in either direction to override the default.
I think this is still wrong. I don't know why we disable the loop
unroller entirely *from Clang* when optimizing for size, as the loop
unrolling pass *already has special logic* for the case where the
function is attributed as optimized for size! We should really be
trusting that. Maybe in a follow-up patch, I don't really want to change
behavior here.
Summary:
UBSan was checking for alignment of the derived class on the pointer to
the base class, before converting. With some class hierarchies, this could
generate false positives.
DataFlowSanitizer is a generalised dynamic data flow analysis.
Unlike other Sanitizer tools, this tool is not designed to detect a
specific class of bugs on its own. Instead, it provides a generic
dynamic data flow analysis framework to be used by clients to help
detect application-specific issues within their own code.
[PCH] Fix a PCH serialization crash, with invalid code related to forward enum references.
The problem was that an enum without closing semicolon could be associated as a forward enum
in an erroneous declaration, leading to the identifier being associated with the enum decl but
without a declaration actually referencing it.
This resulted in not having it serialized before serializing the identifier that is associated with.
Also prevent the ASTUnit from querying the serialized DeclID for an invalid top-level decl; it may not
have been serialized.
Manuel Klimek [Wed, 7 Aug 2013 19:20:45 +0000 (19:20 +0000)]
Fixes a couple of bugs with the Allman brace breaking.
In particular, left braces after an enum declaration now occur on their
own line. Further, when short ifs/whiles are allowed these no longer
cause the left brace to be on the same line as the if/while when a
brace is included.
This field is just IsDefaulted && !IsDeleted; in all places it's used,
a simple check for isDefaulted() is superior anyway, and we were forgetting
to set it in a few cases.
Also eliminate CXXDestructorDecl::IsImplicitlyDefined, for the same reasons.
Daniel Jasper [Wed, 7 Aug 2013 05:34:02 +0000 (05:34 +0000)]
clang-format: Improve formatting of builder-type calls.
This removes a formatting choice that was added at one point, but is
not generally liked by users. Specifically, in builder-type calls, do
(easily) break if the object before the ./-> is either a field or a
parameter-less function call. I.e., don't break after "aa.aa.aa" or
"aa.aa.aa()". In general, these sequences in builder-type calls are
seen as a single entity and thus breaking them up is a bad idea.
ObjectiveC migration: tweak setting of lifetime attribute
on @property migration. Don't set unsafe_unretained
on non-object properties. Set 'retain' on strong
properties. Makecertain properties with specific
names unsafe_unretained as well.
Larisse Voufo [Tue, 6 Aug 2013 05:49:26 +0000 (05:49 +0000)]
Removed hack that was used to properly restore the nested name specifier of qualified variable template ids. It turns out that the current implementation was just not logical setup for it. This commit has made it so.
Richard Trieu [Tue, 6 Aug 2013 03:44:10 +0000 (03:44 +0000)]
Fix for PR16570: when comparing two function pointers, discard qualifiers when
comparing non-reference function parameters. The qualifiers don't matter for
comparisons.
Larisse Voufo [Tue, 6 Aug 2013 01:03:05 +0000 (01:03 +0000)]
Started implementing variable templates. Top level declarations should be fully supported, up to some limitations documented as FIXMEs or TODO. Static data member templates work very partially. Static data member templates of class templates need particular attention...
David Majnemer [Mon, 5 Aug 2013 22:43:06 +0000 (22:43 +0000)]
[ms-cxxabi] Properly mangle member pointers
There were three things missing from the original implementation:
- We would omit the 'E' qualifier for members int 64-bit mode.
- We would not exmaine the qualifiers in 'IsMember' mode.
- We didn't generate the correct backref to the base class.
Hans Wennborg [Mon, 5 Aug 2013 20:14:43 +0000 (20:14 +0000)]
lit.cfg: better check for MSYS
When running the tests under Cygwin using non-Cygwin python,
the platform would be Windows and there would be bash on the path,
so this check for MSYS would not work correctly.
Richard Smith [Mon, 5 Aug 2013 18:49:43 +0000 (18:49 +0000)]
Implement C++'s restrictions on the type of an expression passed to a vararg
function: it can't be 'void' and it can't be an initializer list. We give a
hard error for these rather than treating them as undefined behavior (we can
and probably should do the same for non-POD types in C++11, but as of this
change we don't).
Slightly rework the checking of variadic arguments in a function with a format
attribute to ensure that certain kinds of format string problem (non-literal
string, too many/too few arguments, ...) don't suppress this error.
Craig Topper [Mon, 5 Aug 2013 06:17:21 +0000 (06:17 +0000)]
Use a shuffle with undef elements instead of inserting 0s in the 128-bit to 256-bit casting intrinsics to improve performance. Thanks to Katya Romanova for identifying this issue.
David Majnemer [Mon, 5 Aug 2013 04:53:41 +0000 (04:53 +0000)]
Sema: Don't assume a nested name specifier holds a type
Sema::PerformObjectMemberConversion assumed that the Qualifier it was
given holds a type. However, the specifier could hold just a namespace.
In this case, we should ignore the qualifier and not attempt to cast to
it.
Hans Wennborg [Fri, 2 Aug 2013 22:24:50 +0000 (22:24 +0000)]
Re-commit r187637: "clang-cl: add more options"
> This adds a bunch of options to clang-cl. Notably, this includes
> all the options that get passed when doing a default build of a
> command-line project with msbuild.exe in Debug and Release modes,
> and I believe all flags from Reid's original patch.
The original commit was reverted in r187640 after it broke the Mac build.
This should now be fixed, by Clang r187668, LLVM r187675, and putting
a -- before %s in the test.
Manuel Klimek [Fri, 2 Aug 2013 21:24:09 +0000 (21:24 +0000)]
Fix crash when encountering alias templates in isDerivedFrom matches.
- pull out function to drill to the CXXRecordDecl from the type,
to allow recursive resolution
- make the analysis more robust by rather skipping values we don't
understand
Richard Smith [Fri, 2 Aug 2013 01:09:12 +0000 (01:09 +0000)]
When merging redeclaration chains across modules, if a declaration is visible
in one module but is only declared as a friend in another module, keep it
visible in the result of the merge.
This is incomplete on two axes:
1) Our handling of local extern declarations is basically broken (we put them
in the wrong decl context, and don't find them in redeclaration lookup, unless
they've previously been declared), and this results in them making friends
visible after a merge.
2) Eventually we'll need to mark that this has happened, and more carefully
check whether a declaration should be visible if it was only visible in some
of the modules in which it was declared. Fortunately it's rare for the
identifier namespace of a declaration to change along its redeclaration chain.
Hans Wennborg [Fri, 2 Aug 2013 00:30:15 +0000 (00:30 +0000)]
clang-cl: add more options
This adds a bunch of options to clang-cl. Notably, this includes
all the options that get passed when doing a default build of a
command-line project with msbuild.exe in Debug and Release modes,
and I believe all flags from Reid's original patch.
Jordan Rose [Thu, 1 Aug 2013 22:16:36 +0000 (22:16 +0000)]
[analyzer] Don't process autorelease counts in synthesized function bodies.
We process autorelease counts when we exit functions, but if there's an
issue in a synthesized body the report will get dropped. Just skip the
processing for now and let it get handled when the caller gets around to
processing autoreleases.
(This is still suboptimal: objects autoreleased in the caller context
should never be warned about when exiting a callee context, synthesized
or not.)
Jordan Rose [Thu, 1 Aug 2013 22:16:30 +0000 (22:16 +0000)]
[analyzer] Silently drop all reports within synthesized bodies.
Much of our diagnostic machinery is set up to assume that the report
end path location is valid. Moreover, the user may be quite confused
when something goes wrong in our BodyFarm-synthesized function bodies,
which may be simplified or modified from the real implementations.
Rather than try to make this all work somehow, just drop the report so
that we don't try to go on with an invalid source location.
Note that we still handle reports whose /paths/ go through invalid
locations, just not those that are reported in one.
We do have to be careful not to lose warnings because of this.
The impetus for this change was an autorelease being processed within
the synthesized body, and there may be other possible issues that are
worth reporting in some way. We'll take these as they come, however.
This unifies the unix and windows versions of FileManager::UniqueDirContainer
and FileManager::UniqueFileContainer by using UniqueID.
We cannot just replace "struct stat" with llvm::sys::fs::file_status, since we
want to be able to construct fake ones, and file_status has different members
on unix and windows.
What the patch does is:
* Record only the information that clang is actually using.
* Use llvm::sys::fs::status instead of stat and fstat.
* Use llvm::sys::fs::UniqueID
* Delete the old windows versions of UniqueDirContainer and
UniqueFileContainer since the "unix" one now works on windows too.
David Blaikie [Thu, 1 Aug 2013 20:57:40 +0000 (20:57 +0000)]
DebugInfo: Don't prefer declarations over definitions in -flimit-debug-info in C
Without an ODR, the -flimit-debug-info debug info size optimization of
emitting declarations for fully defined types when only a declaration is
needed by the TU, is incorrect. Emit the full definition whenever it's
available in non-C++.
David Blaikie [Thu, 1 Aug 2013 20:31:40 +0000 (20:31 +0000)]
DebugInfo: Emit template arguments for limited types used for context.
We emit definitions with no members when a nested type is
referenced/required (GCC does the same, to be fair) but failed to attach
the template arguments in such a case.
Tim Northover [Thu, 1 Aug 2013 09:23:19 +0000 (09:23 +0000)]
AArch64: initial NEON support
Patch by Ana Pazos
- Completed implementation of instruction formats:
AdvSIMD three same
AdvSIMD modified immediate
AdvSIMD scalar pairwise
- Completed implementation of instruction classes
(some of the instructions in these classes
belong to yet unfinished instruction formats):
Vector Arithmetic
Vector Immediate
Vector Pairwise Arithmetic
- Initial implementation of instruction formats:
AdvSIMD scalar two-reg misc
AdvSIMD scalar three same
- Intial implementation of instruction class:
Scalar Arithmetic
- Initial clang changes to support arm v8 intrinsics.
Note: no clang changes for scalar intrinsics function name mangling yet.
- Comprehensive test cases for added instructions
To verify auto codegen, encoding, decoding, diagnosis, intrinsics.
Craig Topper [Thu, 1 Aug 2013 06:42:40 +0000 (06:42 +0000)]
Fix to handle all non-power-of-2 vector sizes in the mask form of _builtin_shuffle_vector.
Previously a 2-bit mask was used to mask each element of a vec6 mask before doing the extracts instead of 3-bit mask necessary to cover 0-5. vec3 was the only non-power-of-2 that worked correctly because a +1 conditionally added before calculating floor(log2(elements)).
David Majnemer [Thu, 1 Aug 2013 06:13:59 +0000 (06:13 +0000)]
Sema: Diagnose explicitly bound unresolved member expressions decaying into pointers to function type
We would disallow the case where the overloaded member expression is
coming from an address-of operator but we wouldn't issue any diagnostics
when the overloaded member expression comes by way of a function to
pointer decay cast.
Clang's implementation of DR61 is now seemingly complete.
projects / clang / log