File: virtual-function-call.cpp

package info (click to toggle)
llvm-toolchain-16 1%3A16.0.6-15~deb12u1
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 1,634,792 kB
  • sloc: cpp: 6,179,261; ansic: 1,216,205; asm: 741,319; python: 196,614; objc: 75,325; f90: 49,640; lisp: 32,396; pascal: 12,286; sh: 9,394; perl: 7,442; ml: 5,494; awk: 3,523; makefile: 2,723; javascript: 1,206; xml: 886; fortran: 581; cs: 573
file content (20 lines) | stat: -rw-r--r-- 593 bytes parent folder | download | duplicates (5) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
 
// Check that we call llvm.load.relative() on a vtable function call.

// RUN: %clang_cc1 %s -triple=aarch64-unknown-fuchsia -O3 -S -o - -emit-llvm | FileCheck %s

// CHECK:      define{{.*}} void @_Z5A_fooP1A(ptr noundef %a) local_unnamed_addr
// CHECK-NEXT: entry:
// CHECK-NEXT:   %vtable = load ptr, ptr %a
// CHECK-NEXT:   [[func_ptr:%[0-9]+]] = tail call ptr @llvm.load.relative.i32(ptr %vtable, i32 0)
// CHECK-NEXT:   tail call void [[func_ptr]](ptr {{[^,]*}} %a)
// CHECK-NEXT:   ret void
// CHECK-NEXT: }

class A {
public:
  virtual void foo();
};

void A_foo(A *a) {
  a->foo();
}