Clang's support for weakref is now better than llvm-gcc's :-)
We don't introduce a new symbol and we correctly mark undefined references weak only if there is no
definition or regular undefined references in the same file.
Douglas Gregor [Wed, 3 Mar 2010 22:53:40 +0000 (22:53 +0000)]
Implement disambiguation of base class members via a
nested-name-specifier. For example, this allows member access in
diamond-shaped hierarchies like:
struct Base {
void Foo();
int Member;
};
struct D1 : public Base {};
struct D2 : public Base {};
struct Derived : public D1, public D2 { }
void Test(Derived d) {
d.Member = 17; // error: ambiguous cast from Derived to Base
d.D1::Member = 17; // error: okay, modify D1's Base's Member
}
Fixes PR5820 and <rdar://problem/7535045>. Also, eliminate some
redundancy between Sema::PerformObjectMemberConversion() and
Sema::PerformObjectArgumentInitialization() -- the latter now calls
the former.
Implements mangling of local class names to
fix a code gen crash. This is WIP as not
all ABI cases are covered (there is a FIXME to
this effect). Fixes radar 7696748.
Douglas Gregor [Wed, 3 Mar 2010 04:38:46 +0000 (04:38 +0000)]
Implement name hiding for names found through virtual base subobjects
that are hidden by other derived base subobjects reached along a
lookup path that does *not* pass through the hiding subobject (C++
[class.member.lookup]p6). Fixes PR6462.
John McCall [Wed, 3 Mar 2010 04:15:11 +0000 (04:15 +0000)]
Add proper target hooks for __builtin_extract_return_address and
__builtin_frob_return_address. The implementations for both are
still trivial in the default case.
Ted Kremenek [Wed, 3 Mar 2010 01:17:41 +0000 (01:17 +0000)]
Fix an algorithmic bug in LiveVariables pointed out by Zhongxing.
If an initializer in a DeclStmt references the declared variable, that
extends the liveness of that variable.
Ted Kremenek [Wed, 3 Mar 2010 01:02:48 +0000 (01:02 +0000)]
Make getClangRevision() check that SVN_VERSION is an empty string
(even if it is defined). This fixes the issue of this function
returning '0' when SVN_VERSION is defined to be "".
John McCall [Tue, 2 Mar 2010 23:09:38 +0000 (23:09 +0000)]
Suppress implicit member redeclarations arising from explicit instantiation
declarations after the member has been explicitly specialized. We already
did this after explicit instantiation definitions; not doing it for
declarations meant that subsequent definitions would see a previous
member declaration with specialization kind "explicit instantiation decl",
which would then happily get overridden.
Ted Kremenek [Tue, 2 Mar 2010 21:43:54 +0000 (21:43 +0000)]
[CFG]
After discussion with Zhongxing, don't force the initializer of DeclStmts to be
block-level expressions.
This led to some interesting fallout:
[UninitializedValues]
Always visit the initializer of DeclStmts (do not assume they are block-level expressions).
[BasicStore]
With initializers of DeclStmts no longer block-level expressions, this causes self-referencing initializers (e.g. 'int x = x') to no longer cause the initialized variable to be live before the DeclStmt. While this is correct, it caused BasicStore::RemoveDeadBindings() to prune off the values of these variables from the initial store (where they are set to uninitialized). The fix is to back-port some (and only some) of the lazy-binding logic from RegionStore to
BasicStore. Now the default values of local variables are determined lazily as opposed
to explicitly initialized.
Douglas Gregor [Tue, 2 Mar 2010 17:18:33 +0000 (17:18 +0000)]
Use CXXTemporaryObjectExpr for explicitly-constructed temporaries. We
used to do this, but it got lost when we switched functional-style
cast syntax over to using the new initialization code. Fixes PR6457.
Zhongxing Xu [Tue, 2 Mar 2010 10:08:30 +0000 (10:08 +0000)]
Register all parameters even if they didn't occur in the function body.
We may query their liveness because they are added to store when passing
argument values.
John McCall [Tue, 2 Mar 2010 03:50:12 +0000 (03:50 +0000)]
Inspired by seeing "MIPS" go by in the commits, I've gone ahead and
implemented a (codegen) target hook for __builtin_extend_pointer.
I'm also making it return a uint64_t instead of an unsigned word; this
comports with typical usage (i.e. the one use I know of).
I don't know if any of the existing targets requires this hook to be
set (other than x86 and x86_64, which I know do not).
John McCall [Tue, 2 Mar 2010 02:31:24 +0000 (02:31 +0000)]
After much consultation aimed at figuring out what this builtin actually
does, document the results and then implement __builtin_extend_pointer for
platforms where it's a no-op.
Douglas Gregor [Tue, 2 Mar 2010 01:29:43 +0000 (01:29 +0000)]
Fix an amusing typo that completely the re-introduction of parameters
for the purposes of parsing default arguments. In effect, we would
re-introduce the parameter with a default argument N times (where N is
the number of parameters preceding the parameter with a default
argument). This showed up when a defaulted parameter of a member
function of a local class shadowed a parameter of the enclosing
function. Fixes PR6383.
Douglas Gregor [Mon, 1 Mar 2010 23:49:23 +0000 (23:49 +0000)]
When we're parsing template names as part of base-specifiers, we are
*not* entering the context of the nested-name-specifier. This was
causing us to look into an uninstantiated template that we shouldn't
look into. Fixes PR6376.
John McCall [Mon, 1 Mar 2010 23:49:17 +0000 (23:49 +0000)]
Split out types that are non-canonical unless dependent as their own
category. Use this in a few places to eliminate unnecessary TST cases and
do some future-proofing. Provide terrible manglings for typeof. Mangle
decltype with some hope of accuracy.
Our manglings for some of the cases covered in the testcase are different
from gcc's, which I've raised as an issue with the ABI list.
Douglas Gregor [Mon, 1 Mar 2010 23:15:13 +0000 (23:15 +0000)]
Keep an explicit stack of function and block scopes, each element of
which has the label map, switch statement stack, etc. Previously, we
had a single set of maps in Sema (for the function) along with a stack
of block scopes. However, this lead to funky behavior with nested
functions, e.g., in the member functions of local classes.
The explicit-stack approach is far cleaner, and we retain a 1-element
cache so that we're not malloc/free'ing every time we enter a
function. Fixes PR6382.
Also, tweaked the unused-variable warning suppression logic to look at
errors within a given Scope rather than within a given function. The
prior code wasn't looking at the right number-of-errors count when
dealing with blocks, since the block's count would be deallocated
before we got to ActOnPopScope. This approach works with nested
blocks/functions, and gives tighter error recovery.
Fix the lookup of names used in a friend declaration to not attempt to
re-declare them. This fixes PR6317. Also add the beginnings of an interesting
test case for p1 of [class.friend] which also covers PR6317.
Chris Lattner [Mon, 1 Mar 2010 20:56:44 +0000 (20:56 +0000)]
avoid issues with the new scope protector. Previously we'd error
with "address taken of label in protected scope, jump to it would have unknown effect on scope"
Douglas Gregor [Mon, 1 Mar 2010 19:00:07 +0000 (19:00 +0000)]
When instantiating a function-scoped enum, make sure that it and its
enumeration constants get placed into the local instantiation hash
table. Fixes PR6375.
Douglas Gregor [Mon, 1 Mar 2010 18:27:54 +0000 (18:27 +0000)]
Robustify instantiation of templates when there are errors in the
template definition. Do this both by being more tolerant of errors in
our asserts and by not dropping a variable declaration completely when
its initializer is ill-formed. Fixes the crash-on-invalid in PR6375,
but not the original issue.
John McCall [Mon, 1 Mar 2010 18:20:46 +0000 (18:20 +0000)]
Don't infinite-loop if TryAnnotateCXXScopeToken fails to annotate but doesn't
signal an error. This can happen even when the current token is '::' if
this is a ::new or ::delete expression.
This was an oversight in my recent parser refactor; fixes PR 5825.
Douglas Gregor [Mon, 1 Mar 2010 15:56:25 +0000 (15:56 +0000)]
When looking for the instantiated declaration that corresponds to a
given declaration in a template, make sure that the context we're
searching through is complete. Fixes PR6376.
Douglas Gregor [Mon, 1 Mar 2010 01:04:55 +0000 (01:04 +0000)]
Don't warn about case-value conversions from a negative value to a
larger unsigned value, since this is implementation-defined
behavior. (We previously suppressed this warning when converting from
a signed value to an unsigned value of the same size).
Chris Lattner [Sun, 28 Feb 2010 18:18:36 +0000 (18:18 +0000)]
Implement PR6423 by using one token of lookahead to disambiguate
an *almost* always incorrect case. This only does the lookahead
in the insanely unlikely case, so it shouldn't impact performance.
On this testcase:
struct foo {
}
typedef int x;
Before:
t.c:3:9: error: cannot combine with previous 'struct' declaration specifier
typedef int x;
^
John McCall [Sun, 28 Feb 2010 13:00:19 +0000 (13:00 +0000)]
Support constant-evaluation of __builtin_nans* as well as the correct constant
evaluation of __builtin_nan*. Most of the work to make this work is in LLVM.
Fixes <rdar://problem/7696712> and part of PR 5255.
projects / clang / log