File: dynamic_cast-no-rtti.cpp

package info (click to toggle)
swiftlang 6.0.3-2
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid, trixie
  • size: 2,519,992 kB
  • sloc: cpp: 9,107,863; ansic: 2,040,022; asm: 1,135,751; python: 296,500; objc: 82,456; f90: 60,502; lisp: 34,951; pascal: 19,946; sh: 18,133; perl: 7,482; ml: 4,937; javascript: 4,117; makefile: 3,840; awk: 3,535; xml: 914; fortran: 619; cs: 573; ruby: 573
file content (26 lines) | stat: -rw-r--r-- 694 bytes parent folder | download | duplicates (14) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
 
// RUN: %clang_cc1 -emit-llvm %s -verify -fno-rtti -triple %itanium_abi_triple -o - | FileCheck %s
// expected-no-diagnostics

struct A {
  virtual ~A(){};
};

struct B : public A {
  B() : A() {}
};

// An upcast can be resolved statically and can be used with -fno-rtti, iff it
// does not use runtime support.
A *upcast(B *b) {
  return dynamic_cast<A *>(b);
// CHECK-LABEL: define {{.*}}ptr @_Z6upcastP1B
// CHECK-NOT: call {{.*}}ptr @__dynamic_cast
}

// A NoOp dynamic_cast can be used with -fno-rtti iff it does not use
// runtime support.
B *samecast(B *b) {
  return dynamic_cast<B *>(b);
// CHECK-LABEL: define {{.*}}ptr @_Z8samecastP1B
// CHECK-NOT: call {{.*}}ptr @__dynamic_cast
}