clang/test/CodeGenCXX/member-function-pointer-calls.cpp

   1 // RUN: %clang_cc1 %s -triple=x86_64-apple-darwin10 -emit-llvm -O3 -o - | FileCheck %s
   2 /// Check that we pass the member pointers indirectly for MinGW64
   3 // RUN: %clang_cc1 %s -triple=x86_64-windows-gnu -emit-llvm -o - | FileCheck %s -check-prefix MINGW64
   4 /// We should be able to optimize calls via the indirectly passed member pointers
   5 // RUN: %clang_cc1 %s -triple=x86_64-windows-gnu -emit-llvm -O3 -o - | FileCheck %s
   6 struct A {
   7   virtual int vf1() { return 1; }
   8   virtual int vf2() { return 2; }
   9 };
  10
  11 int f(A* a, int (A::*fp)()) {
  12   return (a->*fp)();
  13 }
  14
  15 // CHECK-LABEL: define{{.*}} i32 @_Z2g1v()
  16 // CHECK-NOT: }
  17 // CHECK: ret i32 1
  18 // MINGW64-LABEL: define dso_local noundef i32 @_Z2g1v()
  19 // MINGW64: call noundef i32 @_Z1fP1AMS_FivE(ptr noundef %{{.*}}, ptr noundef %{{.*}})
  20 int g1() {
  21   A a;
  22   return f(&a, &A::vf1);
  23 }
  24
  25 // CHECK-LABEL: define{{.*}} i32 @_Z2g2v()
  26 // CHECK-NOT: }
  27 // CHECK: ret i32 2
  28 // MINGW64-LABEL: define dso_local noundef i32 @_Z2g2v()
  29 // MINGW64: call noundef i32 @_Z1fP1AMS_FivE(ptr noundef %{{.*}}, ptr noundef %{{.*}})
  30 int g2() {
  31   A a;
  32   return f(&a, &A::vf2);
  33 }