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path: root/lib/AST/ExprConstant.cpp
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2010-04-29Teach __builtin_offsetof to compute the offsets of members of baseDouglas Gregor
classes, since we only warn (not error) on offsetof() for non-POD types. We store the base path within the OffsetOfExpr itself, then evaluate the offsets within the constant evaluator. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@102571 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-28Completely reimplement __builtin_offsetof, based on a patch by RobertoDouglas Gregor
Amadini. This change introduces a new expression node type, OffsetOfExpr, that describes __builtin_offsetof. Previously, __builtin_offsetof was implemented using a unary operator whose subexpression involved various synthesized array-subscript and member-reference expressions, which was ugly and made it very hard to instantiate as a template. OffsetOfExpr represents the AST more faithfully, with proper type source information and a more compact representation. OffsetOfExpr also has support for dependent __builtin_offsetof expressions; it can be value-dependent, but will never be type-dependent (like sizeof or alignof). This commit introduces template instantiation for __builtin_offsetof as well. There are two major caveats to this patch: 1) CodeGen cannot handle the case where __builtin_offsetof is not a constant expression, so it produces an error. So, to avoid regressing in C, we retain the old UnaryOperator-based __builtin_offsetof implementation in C while using the shiny new OffsetOfExpr implementation in C++. The old implementation can go away once we have proper CodeGen support for this case, which we expect won't cause much trouble in C++. 2) __builtin_offsetof doesn't work well with non-POD class types, particularly when the designated field is found within a base class. I will address this in a subsequent patch. Fixes PR5880 and a bunch of assertions when building Boost.Python tests. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@102542 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-26Introduce Type::isStructureOrClassType(), which does the obviousDouglas Gregor
thing. Audit all uses of Type::isStructure(), changing those calls to isStructureOrClassType() as needed (which is alsmost everywhere). Fixes the remaining failure in Boost.Utility/Swap. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@102386 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-20remove some extraneous qualifiers.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@101912 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-13Teach HasSideEffect about InitListExprs. Not havingChris Lattner
this caused us to codegen dead globals like this: struct foo { int a; int b; }; static struct foo fooarray[] = { {1, 2}, {4}, }; git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@101150 91177308-0d34-0410-b5e6-96231b3b80d8
2010-03-20Evaluate: Fix a subtle bug in the pointer evaluator in which we would do anDaniel Dunbar
expression computation in the wrong bit-width, and end up generating a totally bogus array reference (_g0+8589934546). - This showed up on Prolangs/cdecl. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@99042 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-28Support constant-evaluation of __builtin_nans* as well as the correct constantJohn McCall
evaluation of __builtin_nan*. Most of the work to make this work is in LLVM. Fixes <rdar://problem/7696712> and part of PR 5255. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@97383 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-13Fix for PR6274: teach constant folding to evaluate __builtin_expect.Eli Friedman
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@96054 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-03Don't try to fold DeclRefExprs that point to ParmVarDecls. This had the ↵Anders Carlsson
side-effect of always folding the expression to the default argument of the parameter. For example: void f(int a = 10) { return a; } would always return 10, regardless of the passed in argument. This fixes another 600 test failures. We're now down to only 137 failures! git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@95262 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-01In C++, an initializer on a variable doesn't necessarily mean it's the ↵Sebastian Redl
definition. With that in mind, rename getDefinition to getAnyInitializer (to distinguish it from getInit) and reimplement it in terms of isThisDeclarationADefinition. Update all code to use this new function. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@94999 91177308-0d34-0410-b5e6-96231b3b80d8
2010-01-27Change the return type of ASTContext::getDeclAlignInBytes() to CharUnits and,Ken Dyck
now that the "InBytes" part of the name is implied by the return type, rename it to getDeclAlign(). git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@94681 91177308-0d34-0410-b5e6-96231b3b80d8
2010-01-23Created __builtin___NSStringMakeConstantString() builtin, which generates ↵David Chisnall
constant Objective-C strings. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@94274 91177308-0d34-0410-b5e6-96231b3b80d8
2010-01-19Update and move around comments.Eric Christopher
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@93942 91177308-0d34-0410-b5e6-96231b3b80d8
2010-01-15Convert the type of the LValue offset variable in APValue to CharUnits, movingKen Dyck
the LValue-related methods of APValue out of line to avoid header file leaching. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@93512 91177308-0d34-0410-b5e6-96231b3b80d8
2010-01-11Roll out ASTContext::getTypeSizeInChars(), replacing instances ofKen Dyck
"ASTContext::getTypeSize() / 8". Replace [u]int64_t variables with CharUnits ones as appropriate. Also rename RawType, fromRaw(), and getRaw() in CharUnits to QuantityType, fromQuantity(), and getQuantity() for clarity. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@93153 91177308-0d34-0410-b5e6-96231b3b80d8
2010-01-05Add Expr::EvaluateAsBooleanCondition(), which does unprincipled folding toJohn McCall
try to evaluate an expression as a constant boolean condition. This has the same intended semantics as used in folding conditional operators. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@92805 91177308-0d34-0410-b5e6-96231b3b80d8
2010-01-03__builtin_object_size(ptr, type) returns -1 for type = {0,1} if there are ↵Benjamin Kramer
any side-effects. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@92453 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-27Fix PointerExprEvaluator::VisitCastExpr so it doesn't misfold C++ casts whichEli Friedman
it doesn't know how to fold, like derived-to-base casts. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@92173 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-25Remove some dead variables clang-analyzer found.Benjamin Kramer
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@92162 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-23Update for the intrinsic changes in llvm: the object size intrinsicEric Christopher
only takes a boolean second argument now. Update tests accordingly. Currently the builtin still accepts the full range for compatibility. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@91983 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-11Use StringRef.getAsInteger instead of temporary string + strtol. No intended ↵Benjamin Kramer
functionality change. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@91118 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-10Clean up enum constants so that they're finally sane. Fixes PR3173 and aEli Friedman
recently introduced crash. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@91070 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-04Fix for PR5447: teach Evaluate to deal with floating-point conditionals.Eli Friedman
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@90521 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-03Add recursion guards to ice-checking and evaluation for declrefs, so weEli Friedman
don't infinitely recurse for cases we can't evaluate. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@90480 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-28Remove VISIBILITY_HIDDEN from lib/AST.Benjamin Kramer
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@90043 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-24Teach Evaluate to handle member expressions referring to enum constants andEli Friedman
static member constants. No significant visible difference at the moment because it conservatively assumes the base has side effects. I'm planning to use this for CodeGen. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@89738 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-23Intercept sizeof and alignof references before they get into ASTContext ↵Sebastian Redl
methods. This fixes a crash when writing sizeof(Incomplete&), and lets ASTContext's methods do the right thing for CodeGen, which fixes PR5590. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@89668 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-16Add constant evaluation for comma operator with floating-point operand. FixesEli Friedman
PR5449. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@88885 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-05Added support for static variables which requireFariborz Jahanian
initialization before main. Fixes pr5396. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@86145 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-03Refine volatile handling, specifically, we must have the canonicalMike Stump
type to look at the volatile specifier. I found these all from just hand auditing the code. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@85967 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-03silence a warning.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@85931 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-01When determining whether a reference to a static data member is anDouglas Gregor
integral constant expression, make sure to find where the initializer was provided---inside or outside the class definition---since that can affect whether we have an integral constant expression (and, we need to see the initializer itself). git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@85741 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-29Fix one more bug with __builtin_object_size.Mike Stump
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@85538 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-29Fix some issues Daniel pointed out.Mike Stump
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@85526 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-29optimize out some ifdefs.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@85453 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-28Implement clang support for indirect branch and address of labelChris Lattner
using the new LLVM support for this. This is temporarily hiding behind horrible and ugly #ifdefs until the time when the optimizer is stable (hopefully a week or so). Until then, lets make it "opt in" :) git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@85446 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-28Refine __builtin_object_size. Don't try and get a size for thingsMike Stump
that don't have sizes. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@85435 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-27__builtin_object_size refinements. Ensure we handle expressions withMike Stump
side-effects up front, as when we switch to the llvm intrinsic call for __builtin_object_size later, it will have two evaluations. We also finish off the intrinsic version of the code so we can just turn it on once llvm has the intrinsic. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@85324 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-26__builtin_object_size refinements. Also handle stack based objects. WIP.Mike Stump
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@85174 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-26__builtin_object_size refinements. When we run out of object, be sureMike Stump
to clamp at 0 bytes left. WIP. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@85157 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-26Be sure to zero-extend. And refactor.Mike Stump
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@85140 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-26__builtin_object_size refinements. WIP.Mike Stump
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@85136 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-03Ignore No-op casts when evaluating lvalue expressions. Fixes PR5122.Anders Carlsson
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@83267 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-24Refactor the representation of qualifiers to bring ExtQualType out of theJohn McCall
Type hierarchy. Demote 'volatile' to extended-qualifier status. Audit our use of qualifiers and fix a few places that weren't dealing with qualifiers quite right; many more remain. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@82705 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-23implement support for __builtin_eh_return_data_regno on x86-32 and x86-64.Chris Lattner
This implements PR5034 and rdar://6836445. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@82614 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-21Change all the Type::getAsFoo() methods to specializations of Type::getAs().John McCall
Several of the existing methods were identical to their respective specializations, and so have been removed entirely. Several more 'leaf' optimizations were introduced. The getAsFoo() methods which imposed extra conditions, like getAsObjCInterfacePointerType(), have been left in place. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@82501 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-15Codegen support for nullptr from C++0x.Anders Carlsson
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@81835 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-13Add utility to evaluate lvalues which are an offset relative to a stack Eli Friedman
location. Patch by Enea Zaffanella. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@81672 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-09Remove tabs, and whitespace cleanups.Mike Stump
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@81346 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-29Get rid of mostly-unused, buggy method.Eli Friedman
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@80432 91177308-0d34-0410-b5e6-96231b3b80d8
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