File: thunk-returning-memptr.cpp

package info (click to toggle)
llvm-toolchain-11 1%3A11.0.1-2~deb10u1
  • links: PTS, VCS
  • area: main
  • in suites: buster
  • size: 995,836 kB
  • sloc: cpp: 4,767,656; ansic: 760,916; asm: 477,436; python: 170,940; objc: 69,804; lisp: 29,914; sh: 23,855; f90: 18,173; pascal: 7,551; perl: 7,471; ml: 5,603; awk: 3,489; makefile: 2,573; xml: 915; cs: 573; fortran: 503; javascript: 452
file content (27 lines) | stat: -rw-r--r-- 667 bytes parent folder | download | duplicates (2) 
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
27
 
// RUN: %clang_cc1 -triple=i686 -emit-llvm -o - %s | FileCheck %s


struct X;
typedef void (X::*memptr)();

struct A {
  virtual memptr f();
};

struct B {
  virtual memptr f();
};

struct C : A, B {
  C();
  memptr f() override __attribute__((noinline)) { return nullptr; };
};

C::C() {}

// Make sure the member pointer is returned from the thunk via the return slot.
// Because of the tail call, the return value cannot be copied into a local
// alloca. (PR39901)

// CHECK-LABEL: define linkonce_odr void @_ZThn4_N1C1fEv({ i32, i32 }* noalias sret align 4 %agg.result, %struct.C* %this)
// CHECK: tail call void @_ZN1C1fEv({ i32, i32 }* sret align 4 %agg.result