Devang Patel [Wed, 15 Jun 2011 17:57:08 +0000 (17:57 +0000)]
Do not emit stoppoint before emitting debug info for parameters.
- llvm.dbg.declare already receives line number information from ParmDecl
- Additional extra stoppoint messes up gdb's understanding of where function body starts.
Douglas Gregor [Wed, 15 Jun 2011 16:02:29 +0000 (16:02 +0000)]
Eliminate a 'default' case in template argument deduction, where we
were just punting on template argument deduction for a number of type
nodes. Most of them, obviously, didn't matter.
As a consequence of this, make extended vector types (via the
ext_vector_type attribute) actually work properly for several
important cases:
- If the attribute appears in a type-id (i.e, not attached to a
typedef), actually build a proper vector type
- Build ExtVectorType whenever the size is constant; previously, we
were building DependentSizedExtVectorType when the size was constant
but the type was dependent, which makes no sense at all.
- Teach template argument deduction to handle
ExtVectorType/DependentSizedExtVectorType.
Douglas Gregor [Wed, 15 Jun 2011 14:20:42 +0000 (14:20 +0000)]
When performing substitution of default template template parameters
before the template parameters have acquired a proper context (e.g.,
because the enclosing context has yet to be built), provide empty
parameter lists for all outer template parameter scopes to inhibit any
substitution for those template parameters. Fixes PR9643 /
<rdar://problem/9251019>.
Jordy Rose [Wed, 15 Jun 2011 05:52:56 +0000 (05:52 +0000)]
[analyzer] Revise CStringChecker's modelling of strcpy() and strcat():
- (bounded copies) Be more conservative about how much is being copied.
- (str(n)cat) If we can't compute the exact final length of an append operation, we can still lower-bound it.
- (stpcpy) Fix the conjured return value at the end to actually be returned.
This requires these supporting changes:
- C string metadata symbols are still live even when buried in a SymExpr.
- "Hypothetical" C string lengths, to represent a value that /will/ be passed to setCStringLength() if all goes well. (The idea is to allow for temporary constrainable symbols that may end up becoming permanent.)
- The 'checkAdditionOverflow' helper makes sure that the two strings being appended in a strcat don't overflow size_t. This should never *actually* happen; the real effect is to keep the final string length from "wrapping around" in the constraint manager.
This doesn't actually test the "bounded" operations (strncpy and strncat) because they can leave strings unterminated. Next on the list!
Douglas Gregor [Wed, 15 Jun 2011 05:45:11 +0000 (05:45 +0000)]
Don't add redundant FormatAttr, ConstAttr, or NoThrowAttr attributes,
either imlicitly (for builtins) or explicitly (due to multiple
specification of the same attributes). Fixes <rdar://problem/9612060>.
Jordy Rose [Wed, 15 Jun 2011 05:14:03 +0000 (05:14 +0000)]
[analyzer] If a C string length is UnknownVal, clear any existing length binding. No tests yet because the only thing that sets string length is strcpy(), and that needs some work anyway.
Jordy Rose [Wed, 15 Jun 2011 04:55:49 +0000 (04:55 +0000)]
[analyzer] When performing a binary operation on symbolic operands, we convert the symbol values to a common type. But in a relational operation, the result is an 'int' or 'bool', which may not be the appropriate type to convert the operands to. In these cases, use the left-hand operand's type as the conversion type.
There's no associated test for this because fully-constrained symbolic values are evaluated ahead of time in normal expressions. This can only come up in checker-constructed expressions (like the ones in an upcoming patch to CStringChecker).
Douglas Gregor [Wed, 15 Jun 2011 03:23:34 +0000 (03:23 +0000)]
Properly implement C++0x [stmt.dcl]p3, which requires a scope to be
protected in the case where a variable is being initialized by a
trivial default constructor but has a non-trivial destructor.
Ted Kremenek [Wed, 15 Jun 2011 00:54:52 +0000 (00:54 +0000)]
Sema: show shift result in hexadecimal
Change the output for -Wshift-overflow and
-Wshift-sign-overflow to an unsigned hexadecimal. It makes
more sense for looking at bits than a signed decimal does.
Also, change the diagnostic's wording from "overrides"
to "sets".
This uses a new optional argument in APInt::toString()
that adds the '0x' prefix to hexademical numbers.
Chris Lattner [Tue, 14 Jun 2011 18:19:37 +0000 (18:19 +0000)]
revert r133003 and fix the bug properly: the issue was that ## in a token
lexer is not a paste operator, it is a normal token. This fixes a conformance
issue shown here:
http://p99.gforge.inria.fr/c99-conformance/c99-conformance-clang-2.9.html
Douglas Gregor [Tue, 14 Jun 2011 16:42:44 +0000 (16:42 +0000)]
When profiling FunctionProtoTypes, don't canonicalize the expression
in a noexcept exception specification because it isn't part of the
canonical type. This ensures that we keep the exact expression written
in the noexcept exception specification, rather than accidentally
"adopting" a previously-written and canonically "equivalent" function
prototype. Fixes PR10087.
Chris Lattner [Tue, 14 Jun 2011 06:38:10 +0000 (06:38 +0000)]
when compiling in a GNU mode (e.g. gnu99) treat VLAs with a size that can be folded to a constant
as constant size arrays. This has slightly different semantics in some insane cases, but allows
us to accept some constructs that GCC does. Continue to be pedantic in -std=c99 and other
modes. This addressed rdar://8733881 - error "variable-sized object may not be initialized"; g++ accepts same code
Eli Friedman [Tue, 14 Jun 2011 01:37:52 +0000 (01:37 +0000)]
The LLVM IR representation of byval arguments has a rather strange property: if the alignment of an argument to a call is less than the specified byval alignment for that argument, there is no way to specify the alignment of the implied copy. Therefore, we must ensure that the alignment of the argument is at least the byval alignment. To do this, we have to mess with the alignment of relevant alloca's in some cases, and insert a copy that conceptually shouldn't be necessary in some cases.
This patch tries relatively hard to avoid creating an extra copy if it can be avoided (see test3 in the included testcase), but it is not possible to avoid in some cases (like test2 in the included testcase).
Richard Smith [Sun, 12 Jun 2011 11:43:46 +0000 (11:43 +0000)]
Don't assert on initialized typedef declarations in classes:
struct {
typedef int A = 0;
};
According to the C++11 standard, this is not ill-formed, but does not have any ascribed meaning. We can't reasonably accept it, so treat it as ill-formed.
Also switch C++ from an incorrect 'fields can only be initialized in constructors' diagnostic for this case to C's 'illegal initializer (only variables can be initialized)'
Douglas Gregor [Sat, 11 Jun 2011 01:09:30 +0000 (01:09 +0000)]
Implement Objective-C Related Result Type semantics.
Related result types apply Cocoa conventions to the type of message
sends and property accesses to Objective-C methods that are known to
always return objects whose type is the same as the type of the
receiving class (or a subclass thereof), such as +alloc and
-init. This tightens up static type safety for Objective-C, so that we
now diagnose mistakes like this:
t.m:4:10: warning: incompatible pointer types initializing 'NSSet *'
with an
expression of type 'NSArray *' [-Wincompatible-pointer-types]
NSSet *array = [[NSArray alloc] init];
^ ~~~~~~~~~~~~~~~~~~~~~~
/System/Library/Frameworks/Foundation.framework/Headers/NSObject.h:72:1:
note:
instance method 'init' is assumed to return an instance of its
receiver
type ('NSArray *')
- (id)init;
^
It also means that we get decent type inference when writing code in
Objective-C++0x:
auto array = [[NSMutableArray alloc] initWithObjects:@"one", @"two",nil];
// ^ now infers NSMutableArray* rather than id
Eli Friedman [Fri, 10 Jun 2011 21:53:06 +0000 (21:53 +0000)]
PR10120: Make CodeGenModule::getVTableLinkage use NamedDecl::getLinkage to determine whether the vtable should be externally visible, instead of a rough approximation of it which messes up with templates.
While I'm here, zap the other user of isInAnonymousNamespace outside of Decl.cpp.
Sean Hunt [Fri, 10 Jun 2011 09:24:41 +0000 (09:24 +0000)]
Implement caching of copy assignment operator lookup.
I believe, upon, careful review, that this code causes us to incorrectly
handle exception specifications of copy assignment operators in C++03
mode. However, we currently do not seem to properly implement the subtle
distinction between copying of members and bases made by implicit copy
constructors and assignment operators in C++03 - namely that they are
limited in their overload selection - in all cases. As such, I feel that
committing this code is correct pending a careful review of our
implementation of these semantics.
Jordy Rose [Fri, 10 Jun 2011 08:49:37 +0000 (08:49 +0000)]
[analyzer] PR8962 again. Ban ParenExprs (and friends) from block-level expressions (by calling IgnoreParens before adding expressions to blocks). Undo 132769 (LiveVariables' local IgnoreParens), since it's no longer necessary.
Also, have Environment stop looking through NoOp casts; it didn't match the behavior of LiveVariables. And once that's gone, the whole cast block of that switch is unnecessary.
Richard Trieu [Fri, 10 Jun 2011 03:11:26 +0000 (03:11 +0000)]
Made changes to how 'struct'/'class' mismatches are handled in -Wmismatched-tags.
- Removed fix-it hints from template instaniations since changes to the
templates are rarely helpful.
- Changed the caret in template instaniations from the class/struct name to the
class/struct keyword, matching the other warnings.
- Do not offer fix-it hints when multiple declarations disagree. Warnings are
still given.
- Once a definition is found, offer a fix-it hint to all previous declarations
with wrong tag.
- Declarations that disagree with a previous definition will get a fix-it hint
to change the declaration.
Fix a regression in the two-phase lookup diagnostics that switching the
namespace set algorithm (re-)introduced. We may not have seen the 'std'
namespace, but we should still suggested associated namespaces. Easy
fix, but a bit annoying to test.
Nick Lewycky [Tue, 7 Jun 2011 06:07:12 +0000 (06:07 +0000)]
The macros defined by the language standard are still available even when the
-undef flag is passed in. Also __ASSEMBLER__ with -x assembler-with-cpp. (Don't
ask.)
Douglas Gregor [Tue, 7 Jun 2011 02:21:18 +0000 (02:21 +0000)]
Downgrade the warning about the use of typedefs for class template
specializations within an explicit instantiation to default to off
(enabled by -pedantic). Nobody else seem to implement C++
[temp.explicit]p3. Fixes PR10093.
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