c: warn when an integer value comparison with an
integral expression have the obvious result.
Patch reviewed by John McCall off line.
// rdar://12202422
Daniel Jasper [Tue, 18 Sep 2012 14:17:42 +0000 (14:17 +0000)]
Fix isDerivedFrom matcher.
Without this patch, the isDerivedFrom matcher asserts in the
"assert(ClassDecl != NULL);" in the new test, as a
DependentTemplateSpecilizationType is not a sub-type of
TemplateSpecializationType and also does not offer getAsCXXRecordDecl().
I am not sure why this did not cause problems before. It is now (after
the changed implementation of isDerivedFrom) easier to write a matcher
that actually gets into this branch of the code.
Daniel Jasper [Tue, 18 Sep 2012 13:09:13 +0000 (13:09 +0000)]
Make all VariadicDynCast-Expr-matchers StatementMatchers
Having Expr-subclass-matchers being VariadicDynCast-Expr-matchers does
not provide additional type safety and just makes using them harder. In
the clang AST, expressions are always statements and an expression
matcher can be used anywhere, a statement matcher is expected. Any given
matcher definition still has at least one noun.
Richard Smith [Tue, 18 Sep 2012 00:52:05 +0000 (00:52 +0000)]
If a comma operator is followed by a token which unambiguously indicates the
start of a statement or the end of a compound-statement, diagnose the comma as
a typo for a semicolon. Patch by Ahmed Bougacha! Additional test cases and
minor refactoring by me.
Per discussion on cfe-dev, remove -Wunique-enums entirely. There
is no compelling argument that this is a generally useful warning,
and imposes a strong stylistic argument on code beyond what it was
intended to find warnings in.
objective-C: don't warn about class extension property's
missing 'assign' attribute as it is determined by its
overridden property in primary class. // rdar://12214070
Anna Zaks [Mon, 17 Sep 2012 19:13:56 +0000 (19:13 +0000)]
[analyzer] Teach the analyzer about implicit initialization of statics
in ObjCMethods.
Extend FunctionTextRegion to represent ObjC methods as well as
functions. Note, it is not clear what type ObjCMethod region should
return. Since the type of the FunctionText region is not currently used,
defer solving this issue.
Jordan Rose [Mon, 17 Sep 2012 17:54:30 +0000 (17:54 +0000)]
-Warc-retain-cycles: look through [^{...} copy] and Block_copy(^{...})
Retain cycles happen in the case where a block is persisted past its
life on the stack, and the way that occurs is by copying the block.
We should thus look through any explicit copies we see.
Note that Block_copy is actually a type-safe wrapper for _Block_copy,
which does all the real work.
Douglas Gregor [Sun, 16 Sep 2012 01:44:02 +0000 (01:44 +0000)]
Update the PCH internals documentation to cover chained precompiled
headers and modules in more detail. I'd still like to expand on some
of the modules-related issues further, but this is a decent start.
Richard Smith [Sat, 15 Sep 2012 06:09:58 +0000 (06:09 +0000)]
const _Atomic(T) is not an atomic type, so do not allow it as the type 'A' in
C11 7.17's atomic operations. GNU's __atomic_* builtins do allow const-qualified
atomics, though (!!) so don't restrict those.
In StringLiteral::setString make sure that we copy the number of
bytes of the buffer and not the size of the string, otherwise we
may overwrite the buffer if there is a mismatch between the size
of the string and the CharByteWidth, and assertions are disabled.
The bug where this could occur was fixed in r163931.
Related to rdar://12069503
Richard Smith [Fri, 14 Sep 2012 18:27:01 +0000 (18:27 +0000)]
Fix some dead stores which the static analyzer warned about. No functionality
change (the problematic cases in ParseDecl.cpp are currently impossible).
Richard Smith [Fri, 14 Sep 2012 18:21:10 +0000 (18:21 +0000)]
When diagnosing multiple mem-initializers in a delegating ctor, point to the delegating initializer, not to the first initializer. For good measure, also highlight the other initializer.
Douglas Gregor [Fri, 14 Sep 2012 04:20:37 +0000 (04:20 +0000)]
As we do with base and member initializers in a dependent class, delay
type checking for non-static data member initializers in a dependent
class, because our ASTs lose too much information to when
type-checking an initializer. Fixes <rdar://problem/11974632>,
although the result is still rather unsatisfactory.
Douglas Gregor [Thu, 13 Sep 2012 23:40:46 +0000 (23:40 +0000)]
When computing the decltype of an expression, consider Objective-C
ivar and property references as member accesses and produce the actual
type of the declaration. Fixes <rdar://problem/12031582>.
Douglas Gregor [Thu, 13 Sep 2012 21:56:43 +0000 (21:56 +0000)]
When we substitute into the type of a function based on the
TypeSourceInfo, we may have lost some adjustments made to the type of
that function due to declaration merging. Adjust the resulting type
correspondingly. Fixes PR12948 / <rdar://problem/11552434>.
Dmitri Gribenko [Thu, 13 Sep 2012 21:32:58 +0000 (21:32 +0000)]
Comment to XML conversion: we try not to emit empty <Discussion> elements, but
it is not possible to guarantee that without duplicating logic or buffering
<Discussion> element contents. So, allow empty <Discussion> elements in schema.
Richard Smith [Thu, 13 Sep 2012 21:18:54 +0000 (21:18 +0000)]
Implement C++11 [conv.prom]p4: an enumeration with a fixed underlying type has
integral promotions to both its underlying type and to its underlying type's
promoted type. This matters now that boolean conversions aren't permitted in
converted constant expressions (a la DR1407): an enumerator with a fixed
underlying type of bool still can be.
Douglas Gregor [Thu, 13 Sep 2012 21:01:57 +0000 (21:01 +0000)]
Don't perform template argument deduction against invalid templates;
it's likely to lead to a crash later on. Fixes PR12933 /
<rdar://problem/11525335>.
Dmitri Gribenko [Thu, 13 Sep 2012 20:36:01 +0000 (20:36 +0000)]
Comment parsing: handle \deprecated command. It is a block command, but it
should be fine to use it without further explanations in the attached
paragraph, so the warning about empty paragraph was turned off for it.
Douglas Gregor [Thu, 13 Sep 2012 20:16:20 +0000 (20:16 +0000)]
Promote the warning about extra qualification on a declaration from a
warning to an error. C++ bans it, and both GCC and EDG diagnose it as
an error. Microsoft allows it, so we still warn in Microsoft
mode. Fixes <rdar://problem/11135644>.
Richard Smith [Thu, 13 Sep 2012 18:37:50 +0000 (18:37 +0000)]
Make TextDiagnostic more robust against SourceLocations which point into the
middle of UTF-8 characters, and avoid walking to such positions when adjusting
column ranges for display. Fixes a couple of hangs when rendering diagnostics.
When warning about unsafe uses of dispatch_once, specially handle the
crazy case where dispatch_once gets redefined as a macro that calls
_dispatch_once (which calls the real dispatch_once). Users want to
see the warning in their own code.
Conditionally parse documentation comments in system headers by
passing -fretain-comments-from-system-headers. By default, the
compiler no longer parses such documentation comments, as they
can result in a noticeable compile time/PCH slowdown.
I debated whether or not this logic should be sunk into the CFG
itself. It's not clear if we should, as different analyses may
wish to have different policies. We can re-evaluate this in the
future.
Refactor logic in ExprEngine for detecting 'noreturn' methods
in NSException to a helper object in libAnalysis that can also
be used by Sema. Not sure if the predicate name 'isImplicitNoReturn'
is the best one, but we can massage that later.
Chad Rosier [Thu, 13 Sep 2012 00:06:55 +0000 (00:06 +0000)]
[ms-inline asm] Handle the enumeration of input and output expressions in a
more robust way to address a few FIXMEs.
The initial implementation, r163342, built the IR asm string and then tried to
patch things on the fly without enough context. Specifically, it didn't skip
mnemonics nor did it track with assembly instruction an expression was related
to. The new implementation patches the operands and then builds the final
IR string.
Eric Christopher [Wed, 12 Sep 2012 23:36:49 +0000 (23:36 +0000)]
Reapply:
Make clang emit a flag for DW_AT_object_pointer for the artificial
args where it should (implicit first arguments). FileCheck-ize a
test as well and update tests to take into account the object
pointer flag.
Richard Trieu [Wed, 12 Sep 2012 23:13:31 +0000 (23:13 +0000)]
Add two new functions to Qualifiers.
static Qualifiers removeCommonQualifiers(Qualifiers &L, Qualifiers &R)
Removes the common qualifiers from L and R and returns them in a new Qualifier.
This will be used in template diffing.
void removeQualifiers(Qualifiers Q)
Removes the qualifiers in Q from the current qualifier.
This replaces the current underlying implementation of operator- and
operator -= which only performed bit masking.
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