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SemaChecking.cpp
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Richard Smith authored* In C++, never create a FunctionNoProtoType for a builtin (fixes C++1z crasher from r289754). * Fix type of __sync_synchronize to be a no-parameter function rather than a varargs function. This matches GCC. * Fix type of vfprintf to match its actual type. We gave it a wrong type due to PR4290 (apparently autoconf generates invalid code and expects compilers to choke it down or it miscompiles the program; the relevant error in clang was downgraded to a warning in r122744 to fix other occurrences of this autoconf brokenness, so we don't need this workaround any more). * Turn off vararg argument checking for __noop, since it's not *really* a varargs function. Alternatively we could add custom type checking for it and synthesize parameter types matching the actual arguments in each call, but that seemed like overkill. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@290146 91177308-0d34-0410-b5e6-96231b3b80d8
Richard Smith authored* In C++, never create a FunctionNoProtoType for a builtin (fixes C++1z crasher from r289754). * Fix type of __sync_synchronize to be a no-parameter function rather than a varargs function. This matches GCC. * Fix type of vfprintf to match its actual type. We gave it a wrong type due to PR4290 (apparently autoconf generates invalid code and expects compilers to choke it down or it miscompiles the program; the relevant error in clang was downgraded to a warning in r122744 to fix other occurrences of this autoconf brokenness, so we don't need this workaround any more). * Turn off vararg argument checking for __noop, since it's not *really* a varargs function. Alternatively we could add custom type checking for it and synthesize parameter types matching the actual arguments in each call, but that seemed like overkill. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@290146 91177308-0d34-0410-b5e6-96231b3b80d8
SemaChecking.cpp 436.85 KiB
//===--- SemaChecking.cpp - Extra Semantic Checking -----------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements extra semantic analysis beyond what is enforced
// by the C type system.
//
//===----------------------------------------------------------------------===//
#include "clang/AST/ASTContext.h"
#include "clang/AST/CharUnits.h"
#include "clang/AST/DeclCXX.h"
#include "clang/AST/DeclObjC.h"
#include "clang/AST/EvaluatedExprVisitor.h"
#include "clang/AST/Expr.h"
#include "clang/AST/ExprCXX.h"
#include "clang/AST/ExprObjC.h"
#include "clang/AST/ExprOpenMP.h"
#include "clang/AST/StmtCXX.h"
#include "clang/AST/StmtObjC.h"
#include "clang/Analysis/Analyses/FormatString.h"
#include "clang/Basic/CharInfo.h"
#include "clang/Basic/TargetBuiltins.h"
#include "clang/Basic/TargetInfo.h"
#include "clang/Lex/Lexer.h" // TODO: Extract static functions to fix layering.
#include "clang/Sema/Initialization.h"
#include "clang/Sema/Lookup.h"
#include "clang/Sema/ScopeInfo.h"
#include "clang/Sema/Sema.h"
#include "clang/Sema/SemaInternal.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/SmallBitVector.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/Support/ConvertUTF.h"
#include "llvm/Support/Format.h"
#include "llvm/Support/Locale.h"
#include "llvm/Support/raw_ostream.h"
using namespace clang;
using namespace sema;
SourceLocation Sema::getLocationOfStringLiteralByte(const StringLiteral *SL,
unsigned ByteNo) const {
return SL->getLocationOfByte(ByteNo, getSourceManager(), LangOpts,
Context.getTargetInfo());
}
/// Checks that a call expression's argument count is the desired number.
/// This is useful when doing custom type-checking. Returns true on error.
static bool checkArgCount(Sema &S, CallExpr *call, unsigned desiredArgCount) {
unsigned argCount = call->getNumArgs();
if (argCount == desiredArgCount) return false;
if (argCount < desiredArgCount)
return S.Diag(call->getLocEnd(), diag::err_typecheck_call_too_few_args)
<< 0 /*function call*/ << desiredArgCount << argCount
<< call->getSourceRange();
// Highlight all the excess arguments.
SourceRange range(call->getArg(desiredArgCount)->getLocStart(),
call->getArg(argCount - 1)->getLocEnd());
return S.Diag(range.getBegin(), diag::err_typecheck_call_too_many_args)
<< 0 /*function call*/ << desiredArgCount << argCount
<< call->getArg(1)->getSourceRange();