#include "CodeGenFunction.h"
#include "CGDebugInfo.h"
#include "CodeGenModule.h"
#include "TargetInfo.h"
#include "clang/AST/StmtVisitor.h"
#include "clang/Basic/PrettyStackTrace.h"
#include "clang/Basic/TargetInfo.h"
#include "clang/Sema/LoopHint.h"
#include "clang/Sema/SemaDiagnostic.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/IR/CallSite.h"
#include "llvm/IR/DataLayout.h"
#include "llvm/IR/InlineAsm.h"
#include "llvm/IR/Intrinsics.h"
#include "clang/AST/StmtNodes.inc"

Include dependency graph for CGStmt.cpp:

Defines
#define	STMT(Type, Base)
#define	ABSTRACT_STMT(Op)
#define	EXPR(Type, Base) case Stmt::Type##Class:
Enumerations
enum	CSFC_Result { CSFC_Failure, CSFC_FallThrough, CSFC_Success }
Functions
static CSFC_Result	CollectStatementsForCase (const Stmt S, const SwitchCase Case, bool &FoundCase, SmallVectorImpl< const Stmt * > &ResultStmts)
static bool	FindCaseStatementsForValue (const SwitchStmt &S, const llvm::APSInt &ConstantCondValue, SmallVectorImpl< const Stmt * > &ResultStmts, ASTContext &C, const SwitchCase *&ResultCase)
static std::string	SimplifyConstraint (const char Constraint, const TargetInfo &Target, SmallVectorImpl< TargetInfo::ConstraintInfo > OutCons=nullptr)
static std::string	AddVariableConstraints (const std::string &Constraint, const Expr &AsmExpr, const TargetInfo &Target, CodeGenModule &CGM, const AsmStmt &Stmt)
static llvm::MDNode *	getAsmSrcLocInfo (const StringLiteral *Str, CodeGenFunction &CGF)

Define Documentation

#define ABSTRACT_STMT ( Op )

#define EXPR	(	Type,
		Base
	)	case Stmt::Type##Class:

#define STMT	(	Type,
		Base
	)

Enumeration Type Documentation

enum CSFC_Result

CollectStatementsForCase - Given the body of a 'switch' statement and a constant value that is being switched on, see if we can dead code eliminate the body of the switch to a simple series of statements to emit. Basically, on a switch (5) we want to find these statements: case 5: printf(...); <-- ++i; <-- break;

and add them to the ResultStmts vector. If it is unsafe to do this transformation (for example, one of the elided statements contains a label that might be jumped to), return CSFC_Failure. If we handled it and 'S' should include statements after it (e.g. the printf() line is a substmt of the case) then return CSFC_FallThrough. If we handled it and found a break statement, then return CSFC_Success.

If Case is non-null, then we are looking for the specified case, checking that nothing we jump over contains labels. If Case is null, then we found the case and are looking for the break.

If the recursive walk actually finds our Case, then we set FoundCase to true.

Enumerator:

CSFC_Failure
CSFC_FallThrough
CSFC_Success

Definition at line 1326 of file CGStmt.cpp.

Function Documentation

static std::string AddVariableConstraints	(	const std::string &	Constraint,
		const Expr &	AsmExpr,
		const TargetInfo &	Target,
		CodeGenModule &	CGM,
		const AsmStmt &	Stmt
	)		`[static]`

AddVariableConstraints - Look at AsmExpr and if it is a variable declared as using a particular register add that as a constraint that will be used in this asm stmt.

Definition at line 1688 of file CGStmt.cpp.

References clang::CodeGen::CodeGenModule::ErrorUnsupported(), clang::Decl::getAttr(), clang::DeclRefExpr::getDecl(), clang::TargetInfo::getNormalizedGCCRegisterName(), clang::VarDecl::getStorageClass(), clang::TargetInfo::isValidGCCRegisterName(), clang::SC_Register, and clang::TargetInfo::validateOutputConstraint().

Referenced by clang::CodeGen::CodeGenFunction::EmitAsmStmt().

static CSFC_Result CollectStatementsForCase	(	const Stmt *	S,
		const SwitchCase *	Case,
		bool &	FoundCase,
		SmallVectorImpl< const Stmt * > &	ResultStmts
	)		`[static]`

Definition at line 1327 of file CGStmt.cpp.

References clang::CodeGen::CodeGenFunction::containsBreak(), clang::CodeGen::CodeGenFunction::ContainsLabel(), CSFC_Failure, CSFC_FallThrough, and CSFC_Success.

Referenced by FindCaseStatementsForValue().

static bool FindCaseStatementsForValue	(	const SwitchStmt &	S,
		const llvm::APSInt &	ConstantCondValue,
		SmallVectorImpl< const Stmt * > &	ResultStmts,
		ASTContext &	C,
		const SwitchCase *&	ResultCase
	)		`[static]`

FindCaseStatementsForValue - Find the case statement being jumped to and then invoke CollectStatementsForCase to find the list of statements to emit for a switch on constant. See the comment above CollectStatementsForCase for more details.

Definition at line 1453 of file CGStmt.cpp.

References CollectStatementsForCase(), clang::CodeGen::CodeGenFunction::ContainsLabel(), CSFC_Failure, clang::Expr::EvaluateKnownConstInt(), clang::SwitchStmt::getBody(), clang::CaseStmt::getLHS(), clang::SwitchCase::getNextSwitchCase(), clang::CaseStmt::getRHS(), and clang::SwitchStmt::getSwitchCaseList().

Referenced by clang::CodeGen::CodeGenFunction::EmitSwitchStmt().

static llvm::MDNode* getAsmSrcLocInfo	(	const StringLiteral *	Str,
		CodeGenFunction &	CGF
	)		`[static]`

getAsmSrcLocInfo - Return the !srcloc metadata node to attach to an inline asm call instruction. The !srcloc MDNode contains a list of constant integers which are the source locations of the start of each line in the asm.

Definition at line 1767 of file CGStmt.cpp.

References clang::CodeGen::CodeGenFunction::CGM, clang::CodeGen::CodeGenModule::getContext(), clang::CodeGen::CodeGenModule::getLangOpts(), clang::CodeGen::CodeGenFunction::getLLVMContext(), clang::StringLiteral::getLocationOfByte(), clang::StringLiteral::getLocStart(), clang::SourceLocation::getRawEncoding(), clang::ASTContext::getSourceManager(), clang::StringLiteral::getString(), clang::CodeGen::CodeGenFunction::getTarget(), clang::CodeGen::CodeGenTypeCache::Int32Ty, and SM.

Referenced by clang::CodeGen::CodeGenFunction::EmitAsmStmt().

static std::string SimplifyConstraint	(	const char *	Constraint,
		const TargetInfo &	Target,
		SmallVectorImpl< TargetInfo::ConstraintInfo > *	OutCons = `nullptr`
	)		`[static]`

Definition at line 1639 of file CGStmt.cpp.

References clang::TargetInfo::convertConstraint(), and clang::TargetInfo::resolveSymbolicName().

Referenced by clang::CodeGen::CodeGenFunction::EmitAsmStmt().

Defines

Enumerations

Functions

Define Documentation

Enumeration Type Documentation

Function Documentation