CIRGenExprScalar.cpp File Reference

#include "CIRGenFunction.h"
#include "CIRGenValue.h"
#include "clang/AST/Expr.h"
#include "clang/AST/StmtVisitor.h"
#include "clang/CIR/MissingFeatures.h"
#include "mlir/IR/Location.h"
#include "mlir/IR/Value.h"
#include <cassert>
#include <utility>

Go to the source code of this file.

Macros
#define	HANDLEBINOP(OP)
#define	VISITCOMP(CODE)
#define	HANDLE_BINOP(OP)
#define	COMPOUND_OP(Op)

Functions
static bool	mustVisitNullValue (const Expr *e)
static std::optional< QualType >	getUnwidenedIntegerType (const ASTContext &astContext, const Expr *e)
	If e is a widened promoted integer, get its base (unpromoted) type.
static bool	isWidenedIntegerOp (const ASTContext &astContext, const Expr *e)
	Check if e is a widened promoted integer.
static bool	canElideOverflowCheck (const ASTContext &astContext, const BinOpInfo &op)
	Check if we can skip the overflow check for Op.
static mlir::Value	emitPointerArithmetic (CIRGenFunction &cgf, const BinOpInfo &op, bool isSubtraction)
	Emit pointer + index arithmetic.
static bool	isCheapEnoughToEvaluateUnconditionally (const Expr *e, CIRGenFunction &cgf)
	Return true if the specified expression is cheap enough and side-effect-free enough to evaluate unconditionally instead of conditionally.

Macro Definition Documentation

COMPOUND_OP

#define COMPOUND_OP

(

Op

)

Value:

  case BO_##Op##Assign:                                                        \
    return emitter.emitCompoundAssignLValue(e, &ScalarExprEmitter::emit##Op,   \
                                            result)

Referenced by clang::CodeGen::CodeGenFunction::EmitCompoundAssignmentLValue(), and clang::CIRGen::CIRGenFunction::emitCompoundAssignmentLValue().

HANDLE_BINOP

#define HANDLE_BINOP

(

OP

)

Value:

  case BO_##OP:                                                                \
    return emit##OP(emitBinOps(bo, promotionType));

HANDLEBINOP

#define HANDLEBINOP

(

OP

)

Value:

  mlir::Value VisitBin##OP(const BinaryOperator *e) {                          \
    QualType promotionTy = getPromotionType(e->getType());                     \
    auto result = emit##OP(emitBinOps(e, promotionTy));                        \
    if (result && !promotionTy.isNull())                                       \
      result = emitUnPromotedValue(result, e->getType());                      \
    return result;                                                             \
  }                                                                            \
  mlir::Value VisitBin##OP##Assign(const CompoundAssignOperator *e) {          \
    return emitCompoundAssign(e, &ScalarExprEmitter::emit##OP);                \
  }

Definition at line 909 of file CIRGenExprScalar.cpp.

VISITCOMP

#define VISITCOMP

(

CODE

)

Value:

  mlir::Value VisitBin##CODE(const BinaryOperator *E) { return emitCmp(E); }

Definition at line 1012 of file CIRGenExprScalar.cpp.

Function Documentation

canElideOverflowCheck()

bool canElideOverflowCheck ( const ASTContext & astContext, const BinOpInfo & op )

static

Check if we can skip the overflow check for Op.

Definition at line 1464 of file CIRGenExprScalar.cpp.

References clang::cast(), clang::Expr::getType(), clang::ASTContext::getTypeSize(), getUnwidenedIntegerType(), clang::isa(), and clang::Type::isUnsignedIntegerType().

emitPointerArithmetic()

mlir::Value emitPointerArithmetic ( CIRGenFunction & cgf, const BinOpInfo & op, bool isSubtraction )

static

Emit pointer + index arithmetic.

Definition at line 1508 of file CIRGenExprScalar.cpp.

References clang::cast(), clang::CIRGen::CIRGenFunction::cgm, cir::CIRBaseBuilderTy::createIntToPtr(), clang::CIRGen::CIRGenBuilderTy::createNeg(), clang::CIRGen::CIRGenModule::errorNYI(), clang::ast_matchers::expr, clang::Type::getAs(), clang::ASTContext::getAsVariableArrayType(), clang::CIRGen::CIRGenFunction::getBuilder(), clang::CIRGen::CIRGenFunction::getContext(), clang::Expr::getExprLoc(), clang::CIRGen::CIRGenFunction::getLoc(), clang::Expr::getType(), clang::Type::isFunctionType(), clang::BinaryOperator::isNullPointerArithmeticExtension(), clang::Type::isVoidType(), clang::ast_matchers::pointerType, and cir::MissingFeatures::sanitizers().

Referenced by EmitPointerWithAlignment().

getUnwidenedIntegerType()

std::optional< QualType > getUnwidenedIntegerType ( const ASTContext & astContext, const Expr * e )

static

If e is a widened promoted integer, get its base (unpromoted) type.

Definition at line 1444 of file CIRGenExprScalar.cpp.

References clang::Expr::getType(), clang::ASTContext::getTypeSize(), clang::Expr::IgnoreImpCasts(), and clang::ASTContext::isPromotableIntegerType().

Referenced by canElideOverflowCheck(), and isWidenedIntegerOp().

isCheapEnoughToEvaluateUnconditionally()

bool isCheapEnoughToEvaluateUnconditionally ( const Expr * e, CIRGenFunction & cgf )

static

Return true if the specified expression is cheap enough and side-effect-free enough to evaluate unconditionally instead of conditionally.

This is used to convert control flow into selects in some cases. TODO(cir): can be shared with LLVM codegen.

Definition at line 2259 of file CIRGenExprScalar.cpp.

References clang::CIRGen::CIRGenFunction::getContext(), clang::Expr::IgnoreParens(), and clang::Expr::isEvaluatable().

isWidenedIntegerOp()

bool isWidenedIntegerOp ( const ASTContext & astContext, const Expr * e )

static

Check if e is a widened promoted integer.

Definition at line 1458 of file CIRGenExprScalar.cpp.

References getUnwidenedIntegerType().

mustVisitNullValue()

bool mustVisitNullValue ( const Expr * e )

static

Definition at line 1433 of file CIRGenExprScalar.cpp.

References clang::Expr::getType(), clang::isa(), and clang::Type::isNullPtrType().