llvm-project/clang/lib/AST/Stmt.cpp

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//===--- Stmt.cpp - Statement AST Node Implementation ---------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
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//
//===----------------------------------------------------------------------===//
//
// This file implements the Stmt class and statement subclasses.
//
//===----------------------------------------------------------------------===//
#include "clang/AST/Stmt.h"
#include "clang/AST/ExprCXX.h"
#include "clang/AST/ExprObjC.h"
#include "clang/AST/StmtVisitor.h"
#include "clang/Basic/IdentifierTable.h"
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using namespace clang;
static struct StmtClassNameTable {
const char *Name;
unsigned Counter;
unsigned Size;
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} StmtClassInfo[Stmt::lastExprConstant+1];
static StmtClassNameTable &getStmtInfoTableEntry(Stmt::StmtClass E) {
static bool Initialized = false;
if (Initialized)
return StmtClassInfo[E];
// Intialize the table on the first use.
Initialized = true;
#define STMT(N, CLASS, PARENT) \
StmtClassInfo[N].Name = #CLASS; \
StmtClassInfo[N].Size = sizeof(CLASS);
#include "clang/AST/StmtNodes.def"
return StmtClassInfo[E];
}
const char *Stmt::getStmtClassName() const {
return getStmtInfoTableEntry(sClass).Name;
}
void Stmt::DestroyChildren(ASTContext& C) {
for (child_iterator I = child_begin(), E = child_end(); I !=E; ++I)
if (Stmt* Child = *I) Child->Destroy(C);
}
void Stmt::Destroy(ASTContext& C) {
DestroyChildren(C);
// FIXME: Eventually all Stmts should be allocated with the allocator
// in ASTContext, just like with Decls.
// this->~Stmt();
delete this;
}
void DeclStmt::Destroy(ASTContext& C) {
TheDecl->Destroy(C);
delete this;
}
void Stmt::PrintStats() {
// Ensure the table is primed.
getStmtInfoTableEntry(Stmt::NullStmtClass);
unsigned sum = 0;
fprintf(stderr, "*** Stmt/Expr Stats:\n");
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for (int i = 0; i != Stmt::lastExprConstant+1; i++) {
if (StmtClassInfo[i].Name == 0) continue;
sum += StmtClassInfo[i].Counter;
}
fprintf(stderr, " %d stmts/exprs total.\n", sum);
sum = 0;
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for (int i = 0; i != Stmt::lastExprConstant+1; i++) {
if (StmtClassInfo[i].Name == 0) continue;
fprintf(stderr, " %d %s, %d each (%d bytes)\n",
StmtClassInfo[i].Counter, StmtClassInfo[i].Name,
StmtClassInfo[i].Size,
StmtClassInfo[i].Counter*StmtClassInfo[i].Size);
sum += StmtClassInfo[i].Counter*StmtClassInfo[i].Size;
}
fprintf(stderr, "Total bytes = %d\n", sum);
}
void Stmt::addStmtClass(StmtClass s) {
++getStmtInfoTableEntry(s).Counter;
}
static bool StatSwitch = false;
bool Stmt::CollectingStats(bool enable) {
if (enable) StatSwitch = true;
return StatSwitch;
}
const char *LabelStmt::getName() const {
return getID()->getName();
}
// This is defined here to avoid polluting Stmt.h with importing Expr.h
SourceRange ReturnStmt::getSourceRange() const {
if (RetExpr)
return SourceRange(RetLoc, RetExpr->getLocEnd());
else
return SourceRange(RetLoc);
}
bool Stmt::hasImplicitControlFlow() const {
switch (sClass) {
default:
return false;
case CallExprClass:
case ConditionalOperatorClass:
case ChooseExprClass:
case StmtExprClass:
case DeclStmtClass:
return true;
case Stmt::BinaryOperatorClass: {
const BinaryOperator* B = cast<BinaryOperator>(this);
if (B->isLogicalOp() || B->getOpcode() == BinaryOperator::Comma)
return true;
else
return false;
}
}
}
//===----------------------------------------------------------------------===//
// Constructors
//===----------------------------------------------------------------------===//
AsmStmt::AsmStmt(SourceLocation asmloc, bool issimple, bool isvolatile,
unsigned numoutputs, unsigned numinputs,
std::string *names, StringLiteral **constraints,
Expr **exprs, StringLiteral *asmstr, unsigned numclobbers,
StringLiteral **clobbers, SourceLocation rparenloc)
: Stmt(AsmStmtClass), AsmLoc(asmloc), RParenLoc(rparenloc), AsmStr(asmstr)
, IsSimple(issimple), IsVolatile(isvolatile)
, NumOutputs(numoutputs), NumInputs(numinputs) {
for (unsigned i = 0, e = numinputs + numoutputs; i != e; i++) {
Names.push_back(names[i]);
Exprs.push_back(exprs[i]);
Constraints.push_back(constraints[i]);
}
for (unsigned i = 0; i != numclobbers; i++)
Clobbers.push_back(clobbers[i]);
}
ObjCForCollectionStmt::ObjCForCollectionStmt(Stmt *Elem, Expr *Collect,
Stmt *Body, SourceLocation FCL,
SourceLocation RPL)
: Stmt(ObjCForCollectionStmtClass) {
SubExprs[ELEM] = Elem;
SubExprs[COLLECTION] = reinterpret_cast<Stmt*>(Collect);
SubExprs[BODY] = Body;
ForLoc = FCL;
RParenLoc = RPL;
}
ObjCAtCatchStmt::ObjCAtCatchStmt(SourceLocation atCatchLoc,
SourceLocation rparenloc,
Stmt *catchVarStmtDecl, Stmt *atCatchStmt,
Stmt *atCatchList)
: Stmt(ObjCAtCatchStmtClass) {
SubExprs[SELECTOR] = catchVarStmtDecl;
SubExprs[BODY] = atCatchStmt;
SubExprs[NEXT_CATCH] = NULL;
if (atCatchList) {
ObjCAtCatchStmt *AtCatchList = static_cast<ObjCAtCatchStmt*>(atCatchList);
while (ObjCAtCatchStmt* NextCatch = AtCatchList->getNextCatchStmt())
AtCatchList = NextCatch;
AtCatchList->SubExprs[NEXT_CATCH] = this;
}
AtCatchLoc = atCatchLoc;
RParenLoc = rparenloc;
}
//===----------------------------------------------------------------------===//
// Child Iterators for iterating over subexpressions/substatements
//===----------------------------------------------------------------------===//
// DeclStmt
Stmt::child_iterator DeclStmt::child_begin() { return getDecl(); }
Stmt::child_iterator DeclStmt::child_end() { return child_iterator(); }
DeclStmt::decl_iterator& DeclStmt::decl_iterator::operator++() {
D = D->getNextDeclarator();
return *this;
}
// NullStmt
Stmt::child_iterator NullStmt::child_begin() { return child_iterator(); }
Stmt::child_iterator NullStmt::child_end() { return child_iterator(); }
// CompoundStmt
Stmt::child_iterator CompoundStmt::child_begin() { return &Body[0]; }
Stmt::child_iterator CompoundStmt::child_end() { return &Body[0]+Body.size(); }
// CaseStmt
Stmt::child_iterator CaseStmt::child_begin() { return &SubExprs[0]; }
Stmt::child_iterator CaseStmt::child_end() { return &SubExprs[END_EXPR]; }
// DefaultStmt
Stmt::child_iterator DefaultStmt::child_begin() { return &SubStmt; }
Stmt::child_iterator DefaultStmt::child_end() { return &SubStmt+1; }
// LabelStmt
Stmt::child_iterator LabelStmt::child_begin() { return &SubStmt; }
Stmt::child_iterator LabelStmt::child_end() { return &SubStmt+1; }
// IfStmt
Stmt::child_iterator IfStmt::child_begin() { return &SubExprs[0]; }
Stmt::child_iterator IfStmt::child_end() { return &SubExprs[0]+END_EXPR; }
// SwitchStmt
Stmt::child_iterator SwitchStmt::child_begin() { return &SubExprs[0]; }
Stmt::child_iterator SwitchStmt::child_end() { return &SubExprs[0]+END_EXPR; }
// WhileStmt
Stmt::child_iterator WhileStmt::child_begin() { return &SubExprs[0]; }
Stmt::child_iterator WhileStmt::child_end() { return &SubExprs[0]+END_EXPR; }
// DoStmt
Stmt::child_iterator DoStmt::child_begin() { return &SubExprs[0]; }
Stmt::child_iterator DoStmt::child_end() { return &SubExprs[0]+END_EXPR; }
// ForStmt
Stmt::child_iterator ForStmt::child_begin() { return &SubExprs[0]; }
Stmt::child_iterator ForStmt::child_end() { return &SubExprs[0]+END_EXPR; }
// ObjCForCollectionStmt
Stmt::child_iterator ObjCForCollectionStmt::child_begin() {
return &SubExprs[0];
}
Stmt::child_iterator ObjCForCollectionStmt::child_end() {
return &SubExprs[0]+END_EXPR;
}
// GotoStmt
Stmt::child_iterator GotoStmt::child_begin() { return child_iterator(); }
Stmt::child_iterator GotoStmt::child_end() { return child_iterator(); }
// IndirectGotoStmt
Expr* IndirectGotoStmt::getTarget() { return cast<Expr>(Target); }
const Expr* IndirectGotoStmt::getTarget() const { return cast<Expr>(Target); }
Stmt::child_iterator IndirectGotoStmt::child_begin() { return &Target; }
Stmt::child_iterator IndirectGotoStmt::child_end() { return &Target+1; }
// ContinueStmt
Stmt::child_iterator ContinueStmt::child_begin() { return child_iterator(); }
Stmt::child_iterator ContinueStmt::child_end() { return child_iterator(); }
// BreakStmt
Stmt::child_iterator BreakStmt::child_begin() { return child_iterator(); }
Stmt::child_iterator BreakStmt::child_end() { return child_iterator(); }
// ReturnStmt
const Expr* ReturnStmt::getRetValue() const {
return cast_or_null<Expr>(RetExpr);
}
Expr* ReturnStmt::getRetValue() {
return cast_or_null<Expr>(RetExpr);
}
Stmt::child_iterator ReturnStmt::child_begin() {
return &RetExpr;
}
Stmt::child_iterator ReturnStmt::child_end() {
return RetExpr ? &RetExpr+1 : &RetExpr;
}
// AsmStmt
Stmt::child_iterator AsmStmt::child_begin() { return child_iterator(); }
Stmt::child_iterator AsmStmt::child_end() { return child_iterator(); }
// ObjCAtCatchStmt
Stmt::child_iterator ObjCAtCatchStmt::child_begin() { return &SubExprs[0]; }
Stmt::child_iterator ObjCAtCatchStmt::child_end() {
return &SubExprs[0]+END_EXPR;
}
// ObjCAtFinallyStmt
Stmt::child_iterator ObjCAtFinallyStmt::child_begin() { return &AtFinallyStmt; }
Stmt::child_iterator ObjCAtFinallyStmt::child_end() { return &AtFinallyStmt+1; }
// ObjCAtTryStmt
Stmt::child_iterator ObjCAtTryStmt::child_begin() { return &SubStmts[0]; }
Stmt::child_iterator ObjCAtTryStmt::child_end() {
return &SubStmts[0]+END_EXPR;
}
// ObjCAtThrowStmt
Stmt::child_iterator ObjCAtThrowStmt::child_begin() {
return &Throw;
}
Stmt::child_iterator ObjCAtThrowStmt::child_end() {
return &Throw+1;
}
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// ObjCAtSynchronizedStmt
Stmt::child_iterator ObjCAtSynchronizedStmt::child_begin() {
return &SubStmts[0];
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}
Stmt::child_iterator ObjCAtSynchronizedStmt::child_end() {
return &SubStmts[0]+END_EXPR;
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}