Minor pass-sensitivity improvement:
if we know that 'len != 0' and know that 'i == 0' then we know that
'i < len' must evaluate to true and cannot evaluate to false
Steve Naroff [Tue, 16 Sep 2008 23:11:46 +0000 (23:11 +0000)]
Remove support for BlockExprExpr. For example...
^(expression) or ^(int arg1, float arg2)(expression)
...is no longer supported.
All block literals now require a compound statement.
Steve Naroff [Tue, 16 Sep 2008 22:25:10 +0000 (22:25 +0000)]
Sema::ActOnBlockReturnStmt(): Need to perform the UsualUnaryConversions on the return type.
Sema::CheckReturnStackAddr(): Make sure we skip over implicit casts.
Added some more test cases...
ProgramPoint now takes the space of two pointers instead of one. This change was
motivated because it became clear that the number of subclasses of ProgramPoint
would expand and we ran out of bits to represent a pointer variant. As a plus of
this change, BlockEdge program points can now be represented explicitly without
using a cache of CFGBlock* pairs in CFG.
Daniel Dunbar [Fri, 12 Sep 2008 18:39:42 +0000 (18:39 +0000)]
Round out object size checking builtins (fprintf ones disabled as we
have no mapping to FILE*). We are also missing printf format
attributes for the printf style ones.
Daniel Dunbar [Fri, 12 Sep 2008 18:10:20 +0000 (18:10 +0000)]
Add --suppress-system-warnings (on by default, use =0 to disable)
- For investigating warnings in system headers / builtins.
- Currently also enables the behavior that allows silent redefinition
of types in system headers. Conceptually these are separate but I
didn't feel it was worth two options (or changing LangOptions).
Daniel Dunbar [Thu, 11 Sep 2008 23:12:46 +0000 (23:12 +0000)]
Iterate on sema for :? in Objective-C:
- Follow C99 behavior of using other operand type when one of
operands is a null pointer constant.
- Fix overenthusiastic devolving of any Objective-C types to id:
o If either operand has an Objective-C object type then:
- If both operands are interfaces and either operand can be
assigned to the other, use that type as the composite type.
- Otherwise, if either type is id, use id as the composite type.
- Otherwise, warn about incompatible types and use id as the
composite type.
- Return handling of qualified idea to separate test following
general pointer type checking.
o Upgraded from old code to allow devolving to id (without warning,
which matches GCC).
- <rdar://problem/6212771>
Add test case for issues fixed above, XFAIL though because it exposed
a new issue in property handling.
Echo stderr/stdout from clang subprocess to both the stderr of ccc-analyzer and
to an output file. This way users can both see the output of 'clang' as well as
enable background logging of files that clang encounters problems on.
Steve Naroff [Thu, 11 Sep 2008 15:29:03 +0000 (15:29 +0000)]
Fix <rdar://problem/6210791> clang ObjC rewriter: @try / @catch block with no @finally does not call objc_exception_try_exit.
Need a couple tweaks to RewriteObjCTryStmt(). Need to deal with implicit finally clauses (to make sure objc_exception_try_exit is called). Also fixed a related bug where we need to generate an implicit @catch else clause (to again make sure objc_exception_try_exit is called).
Daniel Dunbar [Thu, 11 Sep 2008 01:48:57 +0000 (01:48 +0000)]
Use ABIArgInfo for decisions about function arguments (not just return
value).
- Added ABIArgInfo::ByVal (mostly supported) and ABIArgInfo::Expand
(asserted out).
- Added classifyArgumentType which currently just uses
ABIArgInfo::Default or ByVal. This nearly matches old behavior, but
we now set ByVal in a few situations we may have left it off before
(on complex, for example).
Fold Parser::ParseTag into Parser::ParseEnumSpecifier, as suggested in this post:
http://lists.cs.uiuc.edu/pipermail/cfe-dev/2008-September/002721.html
Daniel Dunbar [Thu, 11 Sep 2008 00:04:36 +0000 (00:04 +0000)]
Bug fix, apply default argument promotion in message sends for which
no method declaration was found.
- This was allowing arrays to pass "by value" among other things.
Add assert in CodeGen that arguments cannot have array type.
Daniel Dunbar [Wed, 10 Sep 2008 07:04:09 +0000 (07:04 +0000)]
Implement ABIArgType::Coerce support.
- As a test, enable basic usage for some common x86-32 cases. This
increases our x86-32 compliance (on other targets our compliance
will just be broken in a different way).
Daniel Dunbar [Wed, 10 Sep 2008 04:01:49 +0000 (04:01 +0000)]
Move FunctionType conversion into CGCall.cpp:
- Added CodeGenTypes::GetFunctionType, taking a CGFunctionInfo.
- Updated Obj-C runtimes to use this instead of rolling the
llvm::FunctionType by hand.
- Killed CodeGenTypes::{ConvertReturnType, DecodeArgumentTypes}.
Add ABIArgInfo class to encapsulate ABI decision of how to lower types
to LLVM.
- Will move to target sometime soon.
Daniel Dunbar [Wed, 10 Sep 2008 00:41:16 +0000 (00:41 +0000)]
Tweak CGCall functions again:
- Realized these functions will eventually need access to more data,
moved to CodeGenModule. Eventually they should probably live
together in some other helper class.
Add new 'CXXConditionDeclExpr' expression node used for a 'condition' declaration, e.g: "if (int x=0) {...}".
It is a subclass of DeclRefExpr and the main difference is that CXXConditionDeclExpr owns the declaration that it references.
Make IdentifierResolver::isDeclInScope regard declarations of a parent 'control' scope as part of the current scope.
The 'control' scope is the 'condition' scope of if/switch/while statements and the scope that contains the for-init-statement and 'condition' of a for statement.
e.g:
if (int x = 0 /*'control' scope*/) {
// x will be regarded as part of this substatement scope.
} else {
// and as part of this substatement scope too.
}
Implement parser support for the 'condition' part of C++ selection-statements and iteration-statements (if/switch/while/for).
Add new 'ActOnCXXConditionDeclarationExpr' action, called when the 'condition' is a declaration instead of an expression.
Steve Naroff [Tue, 9 Sep 2008 14:32:20 +0000 (14:32 +0000)]
Tweak implementation for allowing ObjC builtin type redefinitions.
- Replace string comparisons with pre-defined idents.
- Avoid calling isBuiltinObjCType() to avoid two checks.
- Remove isBuiltinObjCType(), since it was only used in Sema::MergeTypeDefDecl().
- Have Sema::MergeTypeDefDecl() set the new type.
This is a moidified version of an patch by David Chisnall.
Daniel Dunbar [Tue, 9 Sep 2008 01:06:48 +0000 (01:06 +0000)]
Change CodeGen to emit calls using (RValue,Type) list:
- Add CodeGenFunction::EmitAnyExprToTemp
o Like EmitAnyExpr, but emits aggregates to a temporary location if
none is available. Seems like this should be simpler (even aside
from using first class aggregates).
- Killed CodeGenFunction::EmitCallArg (just append the pair)
- Conversion of RValues to actual call arguments is now isolated in
CodeGenFunction::EmitCall.
Daniel Dunbar [Mon, 8 Sep 2008 23:44:31 +0000 (23:44 +0000)]
Fix a number of issues w.r.t. emission of global for functions and
aliases.
- Attributes specific to a definition are only set when the
definition is seen.
- Alias generation is delayed until the end of the module; necessary
since the alias may reference forward.
- Fixes: PR2743, <rdr://6140807&6094512>
- Improves: <rdr://6095112> (added XFAIL)
Daniel Dunbar [Mon, 8 Sep 2008 21:33:45 +0000 (21:33 +0000)]
Refactor parameter attribute handling:
- Add CGCall.h for dealing with ABI issues related to calls.
- Add CGFunctionInfo and CGCallInfo for capturing ABI relevant
information about functions and calls.
- Isolate LLVM parameter attribute handling inside CGCall.cpp
skip test if llvm-gcc is requires but not found on the path.
someone with llvm-gcc installed please test if the Codegen/function-attributes.c test isn't skip in your system. thanks.
Eli Friedman [Sat, 6 Sep 2008 01:37:51 +0000 (01:37 +0000)]
Per PR2773, define __USER_LABEL_PREFIX__ for x86-32 Linux and Windows.
If you're on some other platform, the correct definition for this macro
would be appreciated; to find the correct definition, just run the
following command:
Change struct forward declarations and definitions to use unique RecordDecls, as opposed to creating a single RecordDecl and reusing it.
This change effects both RecordDecls and CXXRecordDecls, but does not effect EnumDecls (yet).
The motivation of this patch is as follows:
- Capture more source information, necessary for refactoring/rewriting clients.
- Pave the way to resolve ownership issues with RecordDecls with the forthcoming
addition of DeclGroups.
Current caveats:
- Until DeclGroups are in place, we will leak RecordDecls not explicitly
referenced by the AST. For example:
typedef struct { ... } x;
The RecordDecl for the struct will be leaked because the TypedefDecl doesn't
refer to it. This will be solved with DeclGroups.
- This patch also (temporarily) breaks CodeGen. More below.
High-level changes:
- As before, TagType still refers to a TagDecl, but it doesn't own it. When
a struct/union/class is first referenced, a RecordType and RecordDecl are
created for it, and the RecordType refers to that RecordDecl. Later, if
a new RecordDecl is created, the pointer to a RecordDecl in RecordType is
updated to point to the RecordDecl that defines the struct/union/class.
- TagDecl and RecordDecl now how a method 'getDefinition()' to return the
TagDecl*/RecordDecl* that refers to the TagDecl* that defines a particular
enum/struct/class/union. This is useful from going from a RecordDecl* that
defines a forward declaration to the RecordDecl* that provides the actual
definition. Note that this also works for EnumDecls, except that in this case
there is no distinction between forward declarations and definitions (yet).
- Clients should no longer assume that 'isDefinition()' returns true from a
RecordDecl if the corresponding struct/union/class has been defined.
isDefinition() only returns true if a particular RecordDecl is the defining
Decl. Use 'getDefinition()' instead to determine if a struct has been defined.
- The main changes to Sema happen in ActOnTag. To make the changes more
incremental, I split off the processing of enums and structs et al into two
code paths. Enums use the original code path (which is in ActOnTag) and
structs use the ActOnTagStruct. Eventually the two code paths will be merged,
but the idea was to preserve the original logic both for comparison and not to
change the logic for both enums and structs all at once.
- There is NO CHAINING of RecordDecls for the same RecordType. All RecordDecls
that correspond to the same type simply have a pointer to that type. If we
need to figure out what are all the RecordDecls for a given type we can build
a backmap.
- The diff in CXXRecordDecl.[cpp,h] is actually very small; it just mimics the
changes to RecordDecl. For some reason 'svn' marks the entire file as changed.
Why is CodeGen broken:
- Codegen assumes that there is an equivalence between RecordDecl* and
RecordType*. This was true before because we only created one RecordDecl* for
a given RecordType*, but it is no longer true. I believe this shouldn't be too
hard to change, but the patch was big enough as it is.
I have tested this patch on both the clang test suite, and by running the static analyzer over Postgresql and a large Apple-internal project (mix of Objective-C and C).
projects / clang / log