Nico Weber [Tue, 23 Dec 2014 22:55:34 +0000 (22:55 +0000)]
clang-cl: Various changes to /Zc: handling.
* /Zc:trigraphs and /Zc:trigraphs- are now honored
* /Zc:strictStrings is now honored
* /Zc:auto is now honored/ignored (clang does the Right Thing for this already)
Also add a dedicated test for the various /Zc: flags.
clang-cl doesn't always agree with cl.exe on the default values for /Zc flags.
For example, I think clang always behaves as if /Zc:inline is passed, and
warns if the user explicitly passes /Zc:inline-
Nico Weber [Mon, 22 Dec 2014 18:35:03 +0000 (18:35 +0000)]
Disable trigraphs in microsoft mode by default. Matches cl.exe.
The default value of Opts.Trigraphs now no longer depends solely on the
language input kind, so move the code out of setLangDefaults(). Also make
sure that Opts.MSVCCompat is set before the Trigraph code runs.
Nico Weber [Mon, 22 Dec 2014 18:13:07 +0000 (18:13 +0000)]
Rename test.cc files to test.cpp.
The lit.cfg files only add .cpp to suffixes, so these tests used to never run,
oops. (Also tweak to of these tests in minor ways to make the actually pass.)
Bob Wilson [Sun, 21 Dec 2014 07:00:00 +0000 (07:00 +0000)]
Reapply "Change -save-temps to emit unoptimized bitcode files."
This reapplies r224503 along with a fix for compiling Fortran by having the
clang driver invoke gcc (see r224546, where it was reverted). I have added
a testcase for that as well.
Original commit message:
It is often convenient to use -save-temps to collect the intermediate
results of a compilation, e.g., when triaging a bug report. Besides the
temporary files for preprocessed source and assembly code, this adds the
unoptimized bitcode files as well.
This adds a new BackendJobAction, which is mostly mechanical, to run after
the CompileJobAction. When not using -save-temps, the BackendJobAction is
combined into one job with the CompileJobAction, similar to the way the
integrated assembler is handled. I've implemented this entirely as a
driver change, so under the hood, it is just using -disable-llvm-optzns
to get the unoptimized bitcode.
Based in part on a patch by Steven Wu.
rdar://problem/18909437
Richard Trieu [Sat, 20 Dec 2014 03:03:32 +0000 (03:03 +0000)]
Fix a bunch of integer template argument problems in template type diffing.
Reverts most of the changes from r168005. Since template arguments have proper
conversions now, no extending of integers is needed. Further, since the
integers are the correct size now, use APSInt::operator== instead of
APSInt::hasSameValue since operator== will check the size and signness match.
Prior to one comparison of APSInt's, check that both are valid. Previous, one
could be uninitialized. Also changed APInt to APSInt in GetInt. This
occassionally produced a sign flip, which will now be caught by operator==.
Richard Trieu [Sat, 20 Dec 2014 02:42:08 +0000 (02:42 +0000)]
Fix for PR21758
When a non-type template argument expression needs a conversion to change it
into the argument type, preserve that information by remaking the
TemplateArgument with an expression that has those conversions. Also a small
fix to template type diffing to handle the extra conversions in some cases.
Aaron Ballman [Sat, 20 Dec 2014 01:54:07 +0000 (01:54 +0000)]
Removing an outdated FIXME; try block attributes are parsed with the rest of the statement attributes (as per the standard), and function-try-blocks may not have attributes. NFC.
Nico Weber [Fri, 19 Dec 2014 23:52:45 +0000 (23:52 +0000)]
Don't drop attributes when checking explicit specializations.
Consider a template class with attributes on a method, and an explicit
specialization of that method:
template <int>
struct A {
void foo() final;
};
template <>
void A<0>::foo() {}
In this example, the attribute is `final`, but it might also be an
__attribute__((visibility("foo"))), noreturn, inline, etc. clang's current
behavior is to strip all attributes, which for some attributes is wrong
(the snippet above allows a subclass of A<0> to override the final method, for
example) and for others disagrees with gcc.
So stop dropping attributes. r95845 added this code without a test case, and
r176728 added the code for dropping attributes on parameters (with tests, but
they still pass).
As an additional wrinkle, do drop dllimport and dllexport, since that's how
these two attributes work. (This is covered by existing tests.)
Fixes PR21942.
The approach is by Richard Smith, initial analysis and typing was done by me.
With this, clang also matches GCC and EDG on all attributes Richard tested.
Alexey Samsonov [Fri, 19 Dec 2014 18:41:43 +0000 (18:41 +0000)]
Allow to disable all sanitizers with "-fno-sanitize=all" option.
Summary:
This patch adds "all" sanitizer group. A shortcut "-fno-sanitize=all"
can be used to disable all sanitizers for a given source file.
"-fsanitize=all" option makes no sense, and will produce an error.
This group can also be useful when we add "-fsanitize-recover=<list>"
options (patch in http://reviews.llvm.org/D6302), as it would allow
to conveniently enable/disable recovery for all specified sanitizers.
Aaron Ballman [Fri, 19 Dec 2014 16:42:04 +0000 (16:42 +0000)]
Attributes accepting an EnumArgument are allowed to pass a string literal, or an identifier. VariadicEnumArguments now behave consistently instead of only accepting a string literal.
This change affects the only attribute accepting a variadic enumeration: callable_when.
[c Sema]. Patch fixes pointer-bool-conversion warning on C code
when source range is incorrect causing the warning to be
issued when it should not because expression is in a macro.
rdar://19256338
Reid Kleckner [Thu, 18 Dec 2014 23:07:04 +0000 (23:07 +0000)]
Revert "Change -save-temps to emit unoptimized bitcode files."
This reverts commit r224503.
It broke compilation of fortran through the Clang driver. Previously
`clang -c t.f` would invoke `gcc t.f` and `clang -cc1as`, but now it
tries to call `clang -cc1 t.f` which fails for obvious reasons.
Reid Kleckner [Thu, 18 Dec 2014 18:17:42 +0000 (18:17 +0000)]
Revert "Don't build invalid AST nodes during recovery"
This reverts commit r224451. It caused us to reject some valid existing
code.
This code appears to run in non-error cases as well as error cases. If
the scope of a DependentScopeDeclRefExpr is still incomplete it probably
means we still have more instantiation to do.
Yaron Keren [Thu, 18 Dec 2014 12:13:14 +0000 (12:13 +0000)]
Enabling this test again on mingw. The problem seems to happen when
two identical module.modulemap are available on the include path and
so should be fixed in the mingw driver include dies, when we'll have it.
Serge Pavlov [Thu, 18 Dec 2014 11:14:21 +0000 (11:14 +0000)]
Fixed warnings on redefine keywords and reserved ids.
Repared support for warnings -Wkeyword-macro and -Wreserved-id-macro.
The warning -Wkeyword-macro now is not issued in patterns that are used
in configuration scripts:
#define inline
also for 'const', 'extern' and 'static'. If macro repalcement is identical
to macro name, the warning also is not issued:
#define volatile volatile
And finally if macro replacement is also a keyword identical to the replaced
one but decorated with leading/trailing underscores:
David Majnemer [Thu, 18 Dec 2014 09:57:31 +0000 (09:57 +0000)]
Parse: Don't parse after the eof has been consumed
ParseCXXNonStaticMemberInitializer stashes away all the tokens for the
initializer and an additional EOF token to denote where the initializer
ends. However, it is possible for ParseLexedMemberInitializer to get
its hands on the "real" EOF token; since the two tokens are
indistinguishable, we end up consuming the EOF and descend into madness.
Instead, make it possible to tell which EOF token we are looking at.
Alexey Bataev [Thu, 18 Dec 2014 06:54:53 +0000 (06:54 +0000)]
Fix for PR21915: assert on multidimensional VLA in function arguments.
Fixed assertion on type checking for arguments and parameters on function call if arguments are pointers to VLA
Differential Revision: http://reviews.llvm.org/D6655
Bob Wilson [Thu, 18 Dec 2014 06:08:26 +0000 (06:08 +0000)]
Change -save-temps to emit unoptimized bitcode files.
It is often convenient to use -save-temps to collect the intermediate
results of a compilation, e.g., when triaging a bug report. Besides the
temporary files for preprocessed source and assembly code, this adds the
unoptimized bitcode files as well.
This adds a new BackendJobAction, which is mostly mechanical, to run after
the CompileJobAction. When not using -save-temps, the BackendJobAction is
combined into one job with the CompileJobAction, similar to the way the
integrated assembler is handled. I've implemented this entirely as a
driver change, so under the hood, it is just using -disable-llvm-optzns
to get the unoptimized bitcode.
Based in part on a patch by Steven Wu.
rdar://problem/18909437
Eric Christopher [Thu, 18 Dec 2014 02:08:55 +0000 (02:08 +0000)]
Make sure that arm-linux-gnu is still the apcs-gnu ABI when we
use clang -cc1 matching the front end and backend. Fix up a couple
of tests that were testing aapcs for arm-linux-gnu.
The test that removes the aapcs abi calling convention removes
them because the default triple matches what the backend uses
for the calling convention there and so it doesn't need to be
explicitly stated - see the code in TargetInfo.cpp.
CGDebugInfo: Use DIBuilder API for self-referencing DICompositeTypes
Use new `DIBuilder` API from LLVM r224482 to mutate `DICompositeType`s,
rather than changing them directly. This allows `DIBuilder` to track
otherwise orphaned cycles when `CollectContainingType()` creates a
self-reference.
Reid Kleckner [Thu, 18 Dec 2014 00:42:51 +0000 (00:42 +0000)]
Fix diagnostic for static methods referencing fields from using decls
Previously we thought the instance member was a function, not a field,
and we'd say something silly like:
t.cpp:4:27: error: call to non-static member function without an object argument
static int f() { return n; }
^
[Objective-C]. Modern property getters have side-effects.
So, place warning about property getter should not be used for side-effect
under its own group so warning can be turned off.
rdar://19137815
Justin Bogner [Wed, 17 Dec 2014 23:55:04 +0000 (23:55 +0000)]
InstrProf: Simplify/reduce state in CoverageMapping (NFC)
This state object makes things harder to reason about and isn't really
useful, since we can just emit the mappings before the state changes
rather than holding on to it.
Reid Kleckner [Wed, 17 Dec 2014 23:40:46 +0000 (23:40 +0000)]
Don't assume friended C++ method decls have qualifiers
There are a few cases where unqualified lookup can find C++ methods.
Unfortunately, none of them seem to have illegal access paths, so I
can't excercise the diagnostic source range code that I am changing
here.
Aaron Ballman [Wed, 17 Dec 2014 21:57:17 +0000 (21:57 +0000)]
Adding a -Wunused-value warning for expressions with side effects used in an unevaluated expression context, such as sizeof(), or decltype(). Also adds a similar warning when the expression passed to typeid() *is* evaluated, since it is equally likely that the user would expect the expression operand to be unevaluated in that case.
Richard Smith [Wed, 17 Dec 2014 20:42:37 +0000 (20:42 +0000)]
[c++1z] Fixes for generalized non-type template argument support: check for
exact type match for deduced template arguments, and be sure to produce correct
canonical TemplateArgument representations to enable correct redeclaration
matching.
Reid Kleckner [Wed, 17 Dec 2014 20:23:11 +0000 (20:23 +0000)]
Destroy the diagnostic client first in ~DiagnosticEngine
Add a comment and a test to ~DiagnosticEngine about the ordering
requirements on the teardown of DiagnosticConsumer. This could also be
accomplished by rearranging the fields of ~DiagnosticEngine, but I felt
that this was a better, more explicit solution.
This fixes PR21911, an issue that occurred after the unique_ptr
migration in r222193.
Yaron Keren [Wed, 17 Dec 2014 20:12:29 +0000 (20:12 +0000)]
This test does not pass for -target i686-pc-windows-gnu (-mingw32)
when clang is built with mingw-w64 4.9.1 or according to
http://llvm.org/PR20995 , mingw-w64 4.7.2 as well.
Reid Kleckner [Wed, 17 Dec 2014 19:34:15 +0000 (19:34 +0000)]
Don't build invalid AST nodes during recovery
A DependentScopeDeclRefExpr should always have a nested name specifier.
During template instantiation, if we found that the named context was
incomplete, we would previously build a DependentScopeDeclRefExpr with
an empty qualifier.
This error recovery path has been asserting for some time. The other
error codepaths use ExprError, so we can do the same.
For MSVC compatibility, add the `__emit' builtin. This is used in the Windows
SDK headers, and must therefore be implemented as a builtin rather than an
intrinsic.
The `__emit' builtin provides a mechanism to emit a 16-bit opcode instruction
into the stream. The value must be a compile time constant expression. No
guarantees are made about the CPU and memory states after the execution of the
instruction.
Due to the unchecked nature of the builtin, only support this on Windows on ARM.
Toma Tabacu [Wed, 17 Dec 2014 12:02:58 +0000 (12:02 +0000)]
[mips] Always clobber $1 for MIPS inline asm.
Summary:
Because GCC doesn't use $1 for code generation, inline assembly code can use $1 without having to add it to the clobbers list.
LLVM, on the other hand, does not shy away from using $1, and this can cause conflicts with inline assembly which assumes GCC-like code generation.
A solution to this problem is to make Clang automatically clobber $1 for all MIPS inline assembly.
This is not the optimal solution, but it seems like a necessary compromise, for now.
Anna Zaks [Wed, 17 Dec 2014 00:34:07 +0000 (00:34 +0000)]
[CallGraph] Make sure the edges are not missed due to re-declarations
A patch by Daniel DeFreez!
We were previously dropping edges on re-declarations. Store the
canonical declarations in the graph to ensure that different
references to the same function end up reflected with the same call graph
node.
(Note, this might lead to performance fluctuation because call graph
is used to determine the function analysis order.)
David Blaikie [Tue, 16 Dec 2014 22:49:17 +0000 (22:49 +0000)]
DebugInfo: Generalize debug info location handling
This is a more scalable (fixed in mostly one place, rather than many
places that will need constant improvement/maintenance) solution to
several commits I've made recently to increase source fidelity for
subexpressions.
This resetting had to be done at the DebugLoc level (not the
SourceLocation level) to preserve scoping information (if the resetting
was done with CGDebugInfo::EmitLocation, it would've caused the tail end
of an expression's codegen to end up in a potentially different scope
than the start, even though it was at the same source location). The
drawback to this is that it might leave CGDebugInfo out of sync. Ideally
CGDebugInfo shouldn't have a duplicate sense of the current
SourceLocation, but for now it seems it does... - I don't think I'm
going to tackle removing that just now.
I expect this'll probably cause some more buildbot fallout & I'll
investigate that as it comes up.
Also these sort of improvements might be starting to show a weakness/bug
in LLVM's line table handling: we don't correctly emit is_stmt for
statements, we just put it on every line table entry. This means one
statement split over multiple lines appears as multiple 'statements' and
two statements on one line (without column info) are treated as one
statement.
I don't think we have any IR representation of statements that would
help us distinguish these cases and identify the beginning of each
statement - so that might be something we need to add (possibly to the
lexical scope chain - a scope for each statement). This does cause some
problems for GDB and possibly other DWARF consumers.
Nick Lewycky [Tue, 16 Dec 2014 22:02:06 +0000 (22:02 +0000)]
Look at whether TransformTypos returned a different Expr instead of looking at the number of uncorrected typos before and after. Correcting one typo may produce an expression with another TypoExpr in it, leading to matching counts even though a typo was corrected.
Nick Lewycky [Tue, 16 Dec 2014 21:39:02 +0000 (21:39 +0000)]
Add a new flag, -fspell-checking-limit=<number> to control how many times we'll do spell checking. Note that spell checking will change the produced AST, so we don't automatically change this value when someone sets -ferror-limit=. With this, merge test typo-correction-pt2.cpp into typo-correction.cpp.
Remove Sema::UnqualifiedTyposCorrected, a cache of corrected typos. It would only cache typo corrections that didn't provide ValidateCandidate of which there were few left, and it had a bug when we had the same identifier spelled wrong twice. See the last two tests in typo-correction.cpp for cases this fires.
Nico Weber [Tue, 16 Dec 2014 21:16:10 +0000 (21:16 +0000)]
Move -Wkeyword-macro into -pedantic, remove -Wreserved-id-macro.
As discussed on the post-commit review thread for r224012, -Wkeyword-macro fires
mostly on headers trying to set up portable defines and doesn't find much bad
stuff in practice. But [macro.names]p2 does disallow defining or undefining
keywords, override and final, and alignas, so keep the warning but move it
into -pedantic.
-Wreserved-id-macro warns on
#define __need_size_t
which is more or less public api for glibc headers. Since this warning isn't
motivated by a standard, remove it.
(See also r223114 for a previous follow-up to r224012.)
Rafael Espindola [Tue, 16 Dec 2014 21:00:30 +0000 (21:00 +0000)]
Put static local variables of inline functions in the function comdat.
The variable (and the GV) is only ever used if the function is. Putting it
in the function's comdat make it easier for the linker to discard them.
The motivating example is
struct S {
static const int x;
};
// const int S::x = 42;
inline const int *f() {
static const int y = S::x;
return &y;
}
const int *g() { return f(); }
With S::x commented out, _ZZ1fvE1y is a variable with a guard variable
that is initialized by f.
Above the implicit copy assignment operator was inferred as host device but
there was only a host assignment copy defined which is an error in device
compilation mode.
Alexey Bataev [Tue, 16 Dec 2014 08:01:48 +0000 (08:01 +0000)]
Renamed RefersToEnclosingLocal bitfield to RefersToCapturedVariable.
Bitfield RefersToEnclosingLocal of Stmt::DeclRefExprBitfields renamed to RefersToCapturedVariable to reflect latest changes introduced in commit 224323. Also renamed method Expr::refersToEnclosingLocal() to Expr::refersToCapturedVariable() and comments for constant arguments.
No functional changes.
Alexey Bataev [Tue, 16 Dec 2014 07:00:22 +0000 (07:00 +0000)]
[OPENMP] Bugfix for processing of global variables in OpenMP regions.
Currently, if global variable is marked as a private OpenMP variable, the compiler crashes in debug version or generates incorrect code in release version. It happens because in the OpenMP region the original global variable is used instead of the generated private copy. It happens because currently globals variables are not captured in the OpenMP region.
This patch adds capturing of global variables iff private copy of the global variable must be used in the OpenMP region.
Differential Revision: http://reviews.llvm.org/D6259
David Majnemer [Tue, 16 Dec 2014 06:31:17 +0000 (06:31 +0000)]
Sema: Don't crash converting to bool from _Atomic
Turning our _Atomic L-value into an R-value removes its _Atomic-ness.
However, we didn't update our 'FromType' which made
ScalarTypeToBooleanCastKind think we were trying to pass it a
non-scalar.
David Majnemer [Tue, 16 Dec 2014 04:52:14 +0000 (04:52 +0000)]
AST: Fix the linkage of static vars in fn template specializations
We that static variables in function template specializations were
externally visible. The manglers assumed that externally visible static
variables were numbered in Sema. We would end up mangling static
variables in the same specialization with the same mangling number which
would give all of them the same name.
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