Douglas Gregor [Wed, 5 May 2010 20:15:55 +0000 (20:15 +0000)]
When we emit a non-constant initializer for a global variable of
reference type, make sure that the initializer we build is the
of the appropriate type for the *reference*, not for the thing that it
refers to. Fixes PR7050.
Douglas Gregor [Wed, 5 May 2010 15:38:32 +0000 (15:38 +0000)]
For thread-safe static initialization of local statics with
destructors, place the __cxa_atexit call after the __cxa_guard_release
call, mimicking GCC/LLVM-GCC behavior. Noticed while debugging
something related.
Sean Hunt [Wed, 5 May 2010 15:24:00 +0000 (15:24 +0000)]
Reapplying patch to change StmtNodes.def to StmtNodes.td, this time
with no whitespace. This will allow statements to be referred to in
attribute TableGen files.
Sean Hunt [Wed, 5 May 2010 15:23:54 +0000 (15:23 +0000)]
Revert r103072; I accidentally ended up deleting a bunch of trailing
whitespace which makes this patch unreadable. Will recommit without the
whitespace.
Douglas Gregor [Wed, 5 May 2010 05:58:24 +0000 (05:58 +0000)]
Support for 'template' as a disambiguator (PR7030)
ParseOptionalCXXScopeSpecifier() only annotates the subset of
template-ids which are not subject to lexical ambiguity. Add support
for the more general case in ParseUnqualifiedId() to handle cases
such as A::template B().
Chris Lattner [Wed, 5 May 2010 05:53:24 +0000 (05:53 +0000)]
add a new --print-diagnostic-categories option, which causes the driver to
print out all of the category numbers with their description. This is useful
for clients that want to map the numbers produced by
--fdiagnostics-show-category=id to their human readable string form. The
output is simple but utilitarian:
Douglas Gregor [Wed, 5 May 2010 05:51:00 +0000 (05:51 +0000)]
Reimplement code generation for copying fields in the
implicitly-generated copy constructor. Previously, Sema would perform
some checking and instantiation to determine which copy constructors,
etc., would be called, then CodeGen would attempt to figure out which
copy constructor to call... but would get it wrong, or poke at an
uninstantiated default argument, or fail in other ways.
The new scheme is similar to what we now do for the implicit
copy-assignment operator, where Sema performs all of the semantic
analysis and builds specific ASTs that look similar to the ASTs we'd
get from explicitly writing the copy constructor, so that CodeGen need
only do a direct translation.
However, it's not quite that simple because one cannot explicit write
elementwise copy-construction of an array. So, I've extended
CXXBaseOrMemberInitializer to contain a list of indexing variables
used to copy-construct the elements. For example, if we have:
struct A { A(const A&); };
struct B {
A array[2][3];
};
then we generate an implicit copy assignment operator for B that looks
something like this:
B::B(const B &other) : array[i0][i1](other.array[i0][i1]) { }
CodeGen will loop over the invented variables i0 and i1 to visit all
elements in the array, so that each element in the destination array
will be copy-constructed from the corresponding element in the source
array. Of course, if we're dealing with arrays of scalars or class
types with trivial copy-assignment operators, we just generate a
memcpy rather than a loop.
Fixes PR6928, PR5989, and PR6887. Boost.Regex now compiles and passes
all of its regression tests.
Conspicuously missing from this patch is handling for the exceptional
case, where we need to destruct those objects that we have
constructed. I'll address that case separately.
Ted Kremenek [Wed, 5 May 2010 00:55:23 +0000 (00:55 +0000)]
Rework clang_annotateTokens() to annotate tokens with information that more closely matches
clang_getCursor(). Tokens are now annotated with the cursor (for the matching AST element)
that most closely encompasses that token.
Chris Lattner [Tue, 4 May 2010 21:55:25 +0000 (21:55 +0000)]
add a new -fdiagnostics-show-category=none/id/name option, giving control
over choice of:
t.c:3:11: warning: conversion specifies type 'char *' but the argument has type 'int' [-Wformat]
t.c:3:11: warning: conversion specifies type 'char *' but the argument has type 'int' [-Wformat,1]
t.c:3:11: warning: conversion specifies type 'char *' but the argument has type 'int' [-Wformat,Format String]
John McCall [Tue, 4 May 2010 20:45:42 +0000 (20:45 +0000)]
Emit the globals, metadata, etc. associated with static variables even when
they're unreachable. This matters because (if they're POD, or if this is C)
the scope containing the variable might be reachable even if the variable
isn't. Fixes PR7044.
Chris Lattner [Tue, 4 May 2010 20:44:26 +0000 (20:44 +0000)]
add the ability to associate 'category' names with diagnostics
and diagnostic groups. This allows the compiler to group
diagnostics together (e.g. "Logic Warning",
"Format String Warning", etc) like the static analyzer does.
This is not exposed through anything in the compiler yet.
Douglas Gregor [Tue, 4 May 2010 17:13:42 +0000 (17:13 +0000)]
Introduce a limit on the depth of the macro instantiation backtrace
printed in a diagnostic, similar to the limit we already have on the
depth of the template instantiation backtrace. The macro instantiation
backtrace is limited to 10 "instantiated from:" diagnostics; when it's
longer than that, we'll show the first half, then say how many were
suppressed, then show the second half. The limit can be changed with
-fmacro-instantiation-limit=N, and turned off with N=0.
This eliminates a lot of note spew with libraries making use of the
Boost.Preprocess library.
Douglas Gregor [Tue, 4 May 2010 15:20:55 +0000 (15:20 +0000)]
When creating a call to a base subobject's operator= in an
implicitly-defined copy assignment operator, suppress the protected
access check. This eliminates the remaining failure in the
Boost.SmartPtr library (that was a product of the copy-assignment
generation rewrite) and, presumably, the Boost.TR1 library as well.
John McCall [Tue, 4 May 2010 01:53:42 +0000 (01:53 +0000)]
When inheriting a default argument expression, inherit the full expression,
not just the inner expression. This is important if the expression has any
temporaries. Fixes PR 7028.
Basically a symptom of really tragic method names.
Douglas Gregor [Mon, 3 May 2010 23:29:10 +0000 (23:29 +0000)]
When computing the template arguments for the instantiation of a
friend function template, be sure to adjust the computed template
argument lists based on the location of the definition of the function
template: it's possible that the definition we're instantiating with
and the template declaration that we found when creating the
specialization are in different contexts, which meant that we would
end up using the wrong template arguments for instantiation.
Fixes PR7013; all Boost.DynamicBitset tests now pass.
For the sake of Objective-c++ overload resolution,
treat argument types of objective-c pointer types
which only differ in their protocol qualifiers as
the same type (radar 7925668).
Douglas Gregor [Mon, 3 May 2010 20:22:41 +0000 (20:22 +0000)]
When instantiating a function-local variable definition, introduce the
mapping from the declaration in the template to the instantiated
declaration before transforming the initializer, in case some crazy
lunatic decides to use a variable in its own initializer. Fixes PR7016.
Ted Kremenek [Mon, 3 May 2010 20:16:35 +0000 (20:16 +0000)]
Workaround: Don't add ObjCMethodDecls to the vector of TopLevelDecls since they don't go in
the DeclContext for the translation unit. This is to workaround a fundamental issue in how
ObjC decls (within an @implementation) are parsed before the ObjCContainerDecl is available.
Douglas Gregor [Mon, 3 May 2010 18:51:14 +0000 (18:51 +0000)]
Diagnose unused exception parameters under a different warning group
(-Wunused-exception-parameter) than normal variables, since it's more
common to name and then ignore an exception parameter. This warning is
neither enabled by default nor by -Wall. Fixes <rdar://problem/7931045>.
Douglas Gregor [Mon, 3 May 2010 18:24:37 +0000 (18:24 +0000)]
Complain when we try to initialize an object of Objective-C class type
(which is ill-formed) with an initializer list. Also, change the
fallback from an assertion to a generic error message, which is far
friendlier. Fixes <rdar://problem/7730948>.
Do not issue warning on unimplemented property in the class, if it
conforms to a protocol as one of its super classes does. This is because
conforming super class will implement the property. This implements
new warning rules for unimplemented properties (radar 7884086).
Douglas Gregor [Mon, 3 May 2010 15:32:18 +0000 (15:32 +0000)]
When instantiating a member function declared via a typedef, don't try
to enter the instantiated parameter declarations into the local
instantiation scope; they can't be referenced anyway. Fixes PR7022.
Douglas Gregor [Sat, 1 May 2010 20:49:11 +0000 (20:49 +0000)]
Complete reimplementation of the synthesis for implicitly-defined copy
assignment operators.
Previously, Sema provided type-checking and template instantiation for
copy assignment operators, then CodeGen would synthesize the actual
body of the copy constructor. Unfortunately, the two were not in sync,
and CodeGen might pick a copy-assignment operator that is different
from what Sema chose, leading to strange failures, e.g., link-time
failures when CodeGen called a copy-assignment operator that was not
instantiation, run-time failures when copy-assignment operators were
overloaded for const/non-const references and the wrong one was
picked, and run-time failures when by-value copy-assignment operators
did not have their arguments properly copy-initialized.
This implementation synthesizes the implicitly-defined copy assignment
operator bodies in Sema, so that the resulting ASTs encode exactly
what CodeGen needs to do; there is no longer any special code in
CodeGen to synthesize copy-assignment operators. The synthesis of the
body is relatively simple, and we generate one of three different
kinds of copy statements for each base or member:
- For a class subobject, call the appropriate copy-assignment
operator, after overload resolution has determined what that is.
- For an array of scalar types or an array of class types that have
trivial copy assignment operators, construct a call to
__builtin_memcpy.
- For an array of class types with non-trivial copy assignment
operators, synthesize a (possibly nested!) for loop whose inner
statement calls the copy constructor.
- For a scalar type, use built-in assignment.
This patch fixes at least a few tests cases in Boost.Spirit that were
failing because CodeGen picked the wrong copy-assignment operator
(leading to link-time failures), and I suspect a number of undiagnosed
problems will also go away with this change.
Some of the diagnostics we had previously have gotten worse with this
change, since we're going through generic code for our
type-checking. I will improve this in a subsequent patch.
Douglas Gregor [Sat, 1 May 2010 15:04:51 +0000 (15:04 +0000)]
Added an RAII object that helps set up/tear down the Sema context
information required to implicitly define a C++ special member
function. Use it rather than explicitly setting CurContext on entry
and exit, which is fragile.
Use this RAII object for the implicitly-defined default constructor,
copy constructor, copy assignment operator, and destructor.
John McCall [Sat, 1 May 2010 00:40:08 +0000 (00:40 +0000)]
It turns out that basically every caller to RequireCompleteDeclContext
already knows what context it's looking in. Just pass that context in
instead of (questionably) recalculating it.
Douglas Gregor [Fri, 30 Apr 2010 21:46:38 +0000 (21:46 +0000)]
After substituting a template argument for a non-type template
parameter with pointer-to-member type, we may have to perform a
qualification conversion, since the pointee type of the parameter
might be more qualified than the pointee type of the argument we form
from the declaration. Fixes PR6986.
Douglas Gregor [Fri, 30 Apr 2010 18:55:50 +0000 (18:55 +0000)]
Clean up our handling of local instantiation scopes, which keep track
of the mapping from local declarations to their instantiated
counterparts during template instantiation. Previously, we tried to do
some unholy merging of local instantiation scopes that involved
storing a single hash table along with an "undo" list on the
side... which was ugly, and never handled function parameters
properly.
Now, we just keep separate hash tables for each local instantiation
scope, and "combining" two scopes means that we'll look in each of the
combined hash tables. The combined scope stack is rarely deep, and
this makes it easy to avoid the "undo" issues we were hitting. Also,
I've simplified the logic for function parameters: if we're declaring
a function and we need the function parameters to live longer, we just
push them back into the local instantiation scope where we need them.
Add calling convention related attributes to related declaration. Mark attributes invalid on type related checking so to add them to declarations only when everything is ok.
projects / clang / log