#include "clang/AST/ExprCXX.h"
#include "clang/AST/GlobalDecl.h"
#include "clang/AST/RecordLayout.h"
#include "clang/AST/TypeLoc.h"
#include "clang/Basic/TargetInfo.h"
#include "clang/Lex/Preprocessor.h"
#include "clang/Sema/Initialization.h"
#include "clang/Sema/Lookup.h"
#include "clang/Sema/Scope.h"
#include "clang/Sema/ScopeInfo.h"
#include "clang/Sema/SemaInternal.h"
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/StringSet.h"
#include "llvm/MC/MCParser/MCAsmParser.h"
#include <optional>

Functions
static void	removeLValueToRValueCast (Expr *E)
	Remove the upper-level LValueToRValue cast from an expression.

static void	emitAndFixInvalidAsmCastLValue (const Expr LVal, Expr BadArgument, Sema &S)
	Emit a warning about usage of "noop"-like casts for lvalues (GNU extension) and fix the argument with removing LValueToRValue cast from the expression.

static bool	CheckAsmLValue (Expr *E, Sema &S)
	CheckAsmLValue - GNU C has an extremely ugly extension whereby they silently ignore "noop" casts in places where an lvalue is required by an inline asm.

static bool	isOperandMentioned (unsigned OpNo, ArrayRef< GCCAsmStmt::AsmStringPiece > AsmStrPieces)
	isOperandMentioned - Return true if the specified operand # is mentioned anywhere in the decomposed asm string.

static bool	CheckNakedParmReference (Expr *E, Sema &S)

static bool	checkExprMemoryConstraintCompat (Sema &S, Expr *E, TargetInfo::ConstraintInfo &Info, bool is_input_expr)
	Returns true if given expression is not compatible with inline assembly's memory constraint; false otherwise.

static StringRef	extractRegisterName (const Expr *Expression, const TargetInfo &Target)

static SourceLocation	getClobberConflictLocation (MultiExprArg Exprs, StringLiteral Constraints, StringLiteral Clobbers, int NumClobbers, unsigned NumLabels, const TargetInfo &Target, ASTContext &Cont)

Function Documentation

◆ CheckAsmLValue()

static bool CheckAsmLValue	(	Expr *	E,
		Sema &	S
	)

static

CheckAsmLValue - GNU C has an extremely ugly extension whereby they silently ignore "noop" casts in places where an lvalue is required by an inline asm.

We emulate this behavior when -fheinous-gnu-extensions is specified, but provide a strong guidance to not use it.

This method checks to see if the argument is an acceptable l-value and returns false if it is a case we can handle.

Definition at line 91 of file SemaStmtAsm.cpp.

References clang::Sema::Context, E, emitAndFixInvalidAsmCastLValue(), clang::Expr::IgnoreParenNoopCasts(), clang::Expr::isLValue(), and clang::Expr::isTypeDependent().

Referenced by clang::Sema::ActOnGCCAsmStmt().

◆ checkExprMemoryConstraintCompat()

static bool checkExprMemoryConstraintCompat	(	Sema &	S,
		Expr *	E,
		TargetInfo::ConstraintInfo &	Info,
		bool	is_input_expr
	)

static

Returns true if given expression is not compatible with inline assembly's memory constraint; false otherwise.

Definition at line 163 of file SemaStmtAsm.cpp.

References clang::SemaBase::Diag(), E, clang::Stmt::getBeginLoc(), clang::TargetInfo::ConstraintInfo::getConstraintStr(), clang::Stmt::getSourceRange(), clang::Expr::refersToBitField(), clang::Expr::refersToGlobalRegisterVar(), and clang::Expr::refersToVectorElement().

Referenced by clang::Sema::ActOnGCCAsmStmt().

◆ CheckNakedParmReference()

static bool CheckNakedParmReference	(	Expr *	E,
		Sema &	S
	)

static

Definition at line 130 of file SemaStmtAsm.cpp.

References clang::Stmt::children(), clang::Sema::CurContext, clang::SemaBase::Diag(), E, clang::Func, and clang::Stmt::getBeginLoc().

Referenced by clang::Sema::ActOnGCCAsmStmt(), and clang::Sema::LookupInlineAsmIdentifier().

◆ emitAndFixInvalidAsmCastLValue()

static void emitAndFixInvalidAsmCastLValue	(	const Expr *	LVal,
		Expr *	BadArgument,
		Sema &	S
	)

static

Emit a warning about usage of "noop"-like casts for lvalues (GNU extension) and fix the argument with removing LValueToRValue cast from the expression.

Definition at line 72 of file SemaStmtAsm.cpp.

References clang::SemaBase::Diag(), clang::Stmt::getBeginLoc(), clang::Sema::getLangOpts(), clang::Stmt::getSourceRange(), and removeLValueToRValueCast().

Referenced by clang::Sema::ActOnGCCAsmStmt(), and CheckAsmLValue().

◆ extractRegisterName()

static StringRef extractRegisterName	(	const Expr *	Expression,
		const TargetInfo &	Target
	)

static

Definition at line 194 of file SemaStmtAsm.cpp.

References clang::Decl::getAttr(), clang::VarDecl::getStorageClass(), clang::SC_Register, and Variable.

Referenced by getClobberConflictLocation().

◆ getClobberConflictLocation()

static SourceLocation getClobberConflictLocation	(	MultiExprArg	Exprs,
		StringLiteral **	Constraints,
		StringLiteral **	Clobbers,
		int	NumClobbers,
		unsigned	NumLabels,
		const TargetInfo &	Target,
		ASTContext &	Cont
	)