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2009-02-28Fix invalid VLAs/VMs in Sema::ActOnVariableDeclarator, so that the variable ↵Anders Carlsson
will have the right type by the time the initializer is checked. This ensures that code like int a[(int)(1.0 / 1.0) = { 1 } will work. Eli, please review. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@65725 91177308-0d34-0410-b5e6-96231b3b80d8
2009-02-28Fix <rdar://problem/6451399> problems with labels and blocks.Steve Naroff
- Move the 'LabelMap' from Sema to Scope. To avoid layering problems, the second element is now a 'StmtTy *', which makes the LabelMap a bit more verbose to deal with. - Add 'ActiveScope' to Sema. Managed by ActOnStartOfFunctionDef(), ObjCActOnStartOfMethodDef(), ActOnBlockStmtExpr(). - Changed ActOnLabelStmt(), ActOnGotoStmt(), ActOnAddrLabel(), and ActOnFinishFunctionBody() to use the new ActiveScope. - Added FIXME to workaround in ActOnFinishFunctionBody() (for dealing with C++ nested functions). git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@65694 91177308-0d34-0410-b5e6-96231b3b80d8
2009-02-28Check a few more kinds of declarations that make a scope.Eli Friedman
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@65680 91177308-0d34-0410-b5e6-96231b3b80d8
2009-02-28Start of checking for gotos which jump to an illegal destination. Eli Friedman
As far as I know, this catches all cases of jumping into the scope of a variable with a variably modified type (excluding statement expressions) in C. This is missing some stuff we probably want to check (other kinds of variably modified declarations, statement expressions, indirect gotos/addresses of labels in a scope, ObjC @try/@finally, cleanup attribute), the diagnostics aren't very good, and it's not particularly efficient, but it's a decent start. This patch is a slightly modified version of the patch I attached to PR3259, and it fixes that bug. I was sort of planning on improving it, but I think it's okay as-is, especially since it looks like CodeGen doesn't have any use for this sort of data structure. The only significant change I can think of from the version I attached to PR3259 is that this version skips running the checking code when a function doesn't contain any labels. This patch doesn't cover case statements, which also need similar checking; I'm not sure how we should deal with that. Extending the goto checking to also check case statements wouldn't be too hard; it's just a matter of keeping track of the scope of the closest switch and checking that the scope of every case is the same as the scope of the switch. That said, it would likely be a performance hit to run this check on every function (it's an extra pass over the entire function), so we probably want some other solution. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@65678 91177308-0d34-0410-b5e6-96231b3b80d8
2009-02-28Fix obvious shortcoming in the implementations of Evaluate for Eli Friedman
integer __real__ and __imag__. Not sure how I missed this. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@65677 91177308-0d34-0410-b5e6-96231b3b80d8
2009-02-27upgrade various 'implicit int' warnings from an ext-warn to warning when notChris Lattner
in C89 mode. This makes it enabled by default instead of only enabled with -pedantic. Clang defaults to c99 mode, so people will see this more often than with GCC, but they can always use -std=c89 if they really want c89. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@65647 91177308-0d34-0410-b5e6-96231b3b80d8
2009-02-27When checking printf-arguments for functions with '__attribute__ ((format ↵Ted Kremenek
(printf, X, Y)))' set HasVAListArg to true when 'Y' is 0 (i.e., ignore the data arguments). This fixes <rdar://problem/6623513>. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@65642 91177308-0d34-0410-b5e6-96231b3b80d8
2009-02-27Oops, Ted beat me to it. I'll just play angry god and remove his version!Daniel Dunbar
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@65638 91177308-0d34-0410-b5e6-96231b3b80d8
2009-02-27Add coverage of "member of anonymous union redeclares ..." diagnostic.Daniel Dunbar
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@65637 91177308-0d34-0410-b5e6-96231b3b80d8
2009-02-27Add test case for PR 3675.Ted Kremenek
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@65635 91177308-0d34-0410-b5e6-96231b3b80d8
2009-02-27Change the AST generated for offsetof a bit so that it looks like a Eli Friedman
normal expression, and change Evaluate and IRGen to evaluate it like a normal expression. This simplifies the code significantly, and fixes PR3396. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@65622 91177308-0d34-0410-b5e6-96231b3b80d8
2009-02-27Some additional ICE tests.Eli Friedman
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@65614 91177308-0d34-0410-b5e6-96231b3b80d8
2009-02-26rename testChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@65587 91177308-0d34-0410-b5e6-96231b3b80d8
2009-02-26ok, not as broken as I thought, just confusing. This allows Chris Lattner
initialization of wchar_t arrays with wide strings, and generalizes wchar_size.c to work on all targets. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@65586 91177308-0d34-0410-b5e6-96231b3b80d8
2009-02-26Fix for PR3663/3669: use TryToFixInvalidVariablyModifiedType for Eli Friedman
variable declarations where applicable. Also, a few fixes to TryToFixInvalidVariablyModifiedType for issues that this exposed. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@65500 91177308-0d34-0410-b5e6-96231b3b80d8
2009-02-25Use CheckAssignmentConstraints for checking the cleanup attr function. Fixes ↵Anders Carlsson
PR3656. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@65461 91177308-0d34-0410-b5e6-96231b3b80d8
2009-02-25C99 DR #316 implies that the function parameter types that are knownDouglas Gregor
only from a function definition (that does not have a prototype) are only used to determine the compatible with other declarations of that same function. In particular, when referencing the function we pretend as if it does not have a prototype. Implement this behavior, which fixes PR3626. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@65460 91177308-0d34-0410-b5e6-96231b3b80d8
2009-02-24When we're declaring an object or function with linkage, teach nameDouglas Gregor
lookup to skip over names without linkage. This finishes <rdar://problem/6127293>. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@65386 91177308-0d34-0410-b5e6-96231b3b80d8
2009-02-24Extend the implicit declaration and checking against out-of-scopeDouglas Gregor
external declarations to also support external variable declarations. Unified the code for these two cases into two new subroutines. Note that we fail to diagnose cases like the one Neil pointed out, where a visible non-external declaration hides an external declaration by the same name. That will require some reshuffling of name lookup. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@65385 91177308-0d34-0410-b5e6-96231b3b80d8
2009-02-24In C, when we see a function declaration within a local scope, exportDouglas Gregor
that declaration to global scope so that it can be found from other scopes. This allows us to diagnose redeclaration errors for external declarations across scopes. We also warn when name lookup finds such an out-of-scope declaration. This is part of <rdar://problem/6127293>; we'll also need to do the same thing for variables. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@65373 91177308-0d34-0410-b5e6-96231b3b80d8
2009-02-24Improve merging of function declarations. Specifically:Douglas Gregor
- When we are declaring a function in local scope, we can merge with a visible declaration from an outer scope if that declaration refers to an entity with linkage. This behavior now works in C++ and properly ignores entities without linkage. - Diagnose the use of "static" on a function declaration in local scope. - Diagnose the declaration of a static function after a non-static declaration of the same function. - Propagate the storage specifier to a function declaration from a prior declaration (PR3425) - Don't name-mangle "main" git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@65360 91177308-0d34-0410-b5e6-96231b3b80d8
2009-02-23fix rdar://6611778, a redefinition of an interface was causing anChris Lattner
assertion when the ivars and method list was reset into the existing interface. To fix this, mark decls as invalid when they are redefined, and don't insert ivars/methods into invalid decls. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@65340 91177308-0d34-0410-b5e6-96231b3b80d8
2009-02-23A few small improvements to Evaluate for stuff I noted in FIXMEs.Eli Friedman
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@65305 91177308-0d34-0410-b5e6-96231b3b80d8
2009-02-22Fix test to be legal on 64-bit systems.Eli Friedman
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@65270 91177308-0d34-0410-b5e6-96231b3b80d8
2009-02-22Throw the switch to exclusively use Evaluate (along with the small Eli Friedman
helper isConstantInitializer) to check whether an initializer is constant. This passes tests, but it's possible that it'll cause regressions with real-world code. Future work: 1. The diagnostics obtained this way are lower quality at the moment; some work both here and in Evaluate is needed for accurate diagnostics. 2. We probably need some extra code when we're in -pedantic mode so we can strictly enforce the rules in C99 6.6p7. 3. Dead code cleanup (this should wait until after 2, because we might want to re-use some of the code). git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@65265 91177308-0d34-0410-b5e6-96231b3b80d8
2009-02-22Fix for PR3433: map __alignof__ to preferred alignment. (This was Eli Friedman
partially done in r65258.) git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@65260 91177308-0d34-0410-b5e6-96231b3b80d8
2009-02-22Improvements to ASTContext::getDeclAlignInBytes; fixes the testcase in Eli Friedman
PR3254 and part of PR3433. The isICE changes are necessary to keep the computed results consistent with Evaluate. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@65258 91177308-0d34-0410-b5e6-96231b3b80d8
2009-02-22Sanity fix for PR3642: if we're treating a diagnostic as an error, it's Eli Friedman
required to actually be an error for correctness. The attached testcase now gives an error instead of mysteriously crashing. Now, it's possible we actually want to support the given usage, but I haven't looked at the relevant code closely. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@65253 91177308-0d34-0410-b5e6-96231b3b80d8
2009-02-21Force arch for these test cases.Daniel Dunbar
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@65252 91177308-0d34-0410-b5e6-96231b3b80d8
2009-02-21Evaluation of unary deref could call integer evaluator on non-integralDaniel Dunbar
expr; hilarity ensued. - PR3640. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@65234 91177308-0d34-0410-b5e6-96231b3b80d8
2009-02-20Always try to fold array sizes, and warn if we could fold something that ↵Anders Carlsson
isn't an ICE. This makes us compatible with GCC. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@65140 91177308-0d34-0410-b5e6-96231b3b80d8
2009-02-20Add support for * (unary dereference) operator to ExprConstant.Eli Friedman
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@65105 91177308-0d34-0410-b5e6-96231b3b80d8
2009-02-20Suppress constant initializer checking when the declaration isn't valid. Eli Friedman
This prevents emitting diagnostics which are almost certainly useless. (Note that the test is checking that we emit only one diagnostic.) git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@65101 91177308-0d34-0410-b5e6-96231b3b80d8
2009-02-19Fix a long standard problem with clang retaining "too much" sugar Chris Lattner
information about types. We often print diagnostics where we say "foo_t" is bad, but the user doesn't know how foo_t is declared (because it is a typedef). Fix this by expanding sugar when present in a diagnostic (and not one of a few special cases, like vectors). Before: t.m:5:2: error: invalid operands to binary expression ('typeof(P)' and 'typeof(F)') MAX(P, F); ^~~~~~~~~ t.m:1:78: note: instantiated from: #define MAX(A,B) ({ __typeof__(A) __a = (A); __typeof__(B) __b = (B); __a < __b ? __b : __a; }) ^ After: t.m:5:2: error: invalid operands to binary expression ('typeof(P)' (aka 'struct mystruct') and 'typeof(F)' (aka 'float')) MAX(P, F); ^~~~~~~~~ t.m:1:78: note: instantiated from: #define MAX(A,B) ({ __typeof__(A) __a = (A); __typeof__(B) __b = (B); __a < __b ? __b : __a; }) ^ git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@65081 91177308-0d34-0410-b5e6-96231b3b80d8
2009-02-19Arguments to unordered comparison builtins may need implicit casts.Daniel Dunbar
- <rdar://problem/6094103> sema fails to promote type arguments to __builtin_isgreater (and friends) git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@65059 91177308-0d34-0410-b5e6-96231b3b80d8
2009-02-19Add sema support for the noinline attribute.Anders Carlsson
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@65055 91177308-0d34-0410-b5e6-96231b3b80d8
2009-02-19fix test caseZhongxing Xu
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@65037 91177308-0d34-0410-b5e6-96231b3b80d8
2009-02-19Emit the correct diagnostics when we constant fold an array size to a ↵Anders Carlsson
negative value. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@65023 91177308-0d34-0410-b5e6-96231b3b80d8
2009-02-19Make sure to check the value of the constant expression, as suggested by Daniel.Anders Carlsson
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@65021 91177308-0d34-0410-b5e6-96231b3b80d8
2009-02-19Handle the GNU void* and function pointer arithmetic extensions for constant ↵Anders Carlsson
expressions as well. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@65013 91177308-0d34-0410-b5e6-96231b3b80d8
2009-02-19Make error-message check platform-agnosticDouglas Gregor
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@64985 91177308-0d34-0410-b5e6-96231b3b80d8
2009-02-18Downgrade the "excess elements in initializer" errors to warnings *inDouglas Gregor
C*. They're required errors in C++. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@64964 91177308-0d34-0410-b5e6-96231b3b80d8
2009-02-18Return true on errors, return true on errors, return true on errorsDouglas Gregor
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@64957 91177308-0d34-0410-b5e6-96231b3b80d8
2009-02-18Downgrade complaints about calling unavailable functions to a warningDouglas Gregor
(as GCC does), except when we've performed overload resolution and found an unavailable function: in this case, we actually error. Merge the checking of unavailable functions with the checking for deprecated functions. This unifies a bit of code, and makes sure that we're checking for unavailable functions in the right places. Also, this check can cause an error. We may, eventually, want an option to make "unavailable" warnings into errors. Implement much of the logic needed for C++0x deleted functions, which are effectively the same as "unavailable" functions (but always cause an error when referenced). However, we don't have the syntax to specify deleted functions yet :) git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@64955 91177308-0d34-0410-b5e6-96231b3b80d8
2009-02-18__attribute__((aligned)) was being ignored!Daniel Dunbar
This knocks out another 8 gcc/compat/i386 & x86_64 failures. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@64947 91177308-0d34-0410-b5e6-96231b3b80d8
2009-02-18use the full spelling of a string literal token so that trigraphsChris Lattner
and escaped newlines don't throw off the offset computation. On this testcase: printf("abc\ def" "%*d", (unsigned) 1, 1); Before: t.m:5:5: warning: field width should have type 'int', but argument has type 'unsigned int' def" ^ after: t.m:6:12: warning: field width should have type 'int', but argument has type 'unsigned int' "%*d", (unsigned) 1, 1); ^ ~~~~~~~~~~~~ git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@64930 91177308-0d34-0410-b5e6-96231b3b80d8
2009-02-18add c testcase for string literal diagnostic improvement.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@64929 91177308-0d34-0410-b5e6-96231b3b80d8
2009-02-18Allow "overloadable" functions in C to be declared as variadic withoutDouglas Gregor
any named parameters, e.g., this is accepted in C: void f(...) __attribute__((overloadable)); although this would be rejected: void f(...); To do this, moved the checking of the "ellipsis without any named arguments" condition from the parser into Sema (where it belongs anyway). git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@64902 91177308-0d34-0410-b5e6-96231b3b80d8
2009-02-18Don't allow calls to functions marked "unavailable". There's more workDouglas Gregor
to do in this area, since there are other places that reference FunctionDecls. Don't allow "overloadable" functions (in C) to be declared without a prototype. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@64897 91177308-0d34-0410-b5e6-96231b3b80d8
2009-02-18Fix test on platforms where size_t != unsigned long.Eli Friedman
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@64867 91177308-0d34-0410-b5e6-96231b3b80d8
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