C++ (Cpp) CodeGenFunction::EmitARCRetainScalarExpr Examples

Example #1

File: CGObjCRuntime.cpp Project: asdlei00/freebsd

void CGObjCRuntime::EmitAtSynchronizedStmt(CodeGenFunction &CGF,
                                           const ObjCAtSynchronizedStmt &S,
                                           llvm::Function *syncEnterFn,
                                           llvm::Function *syncExitFn) {
  CodeGenFunction::RunCleanupsScope cleanups(CGF);

  // Evaluate the lock operand.  This is guaranteed to dominate the
  // ARC release and lock-release cleanups.
  const Expr *lockExpr = S.getSynchExpr();
  llvm::Value *lock;
  if (CGF.getLangOptions().ObjCAutoRefCount) {
    lock = CGF.EmitARCRetainScalarExpr(lockExpr);
    lock = CGF.EmitObjCConsumeObject(lockExpr->getType(), lock);
  } else {
    lock = CGF.EmitScalarExpr(lockExpr);
  }
  lock = CGF.Builder.CreateBitCast(lock, CGF.VoidPtrTy);

  // Acquire the lock.
  CGF.Builder.CreateCall(syncEnterFn, lock)->setDoesNotThrow();

  // Register an all-paths cleanup to release the lock.
  CGF.EHStack.pushCleanup<CallSyncExit>(NormalAndEHCleanup, syncExitFn, lock);

  // Emit the body of the statement.
  CGF.EmitStmt(S.getSynchBody());
}