test/FrontendC++/x86-64-abi-sret-vs-2word-struct-param.cpp

   1 // RUN: %llvmgxx -S -emit-llvm %s -o - | grep byval | count 2
   2 // XTARGET: x86
   3 // PR4242
   4 // (PR 4242 bug is on 64-bit only, test passes on x86-32 as well)
   5
   6 struct S {
   7     void* data[3];
   8 };
   9
  10 struct T {
  11     void* data[2];
  12 };
  13
  14 extern "C" S fail(int, int, int, int, T t, void* p) {
  15     S s;
  16     s.data[0] = t.data[0];
  17     s.data[1] = t.data[1];
  18     s.data[2] = p;
  19     return s;
  20 }
  21
  22 extern "C" S* succeed(S* sret, int, int, int, int, T t, void* p) {
  23     sret->data[0] = t.data[0];
  24     sret->data[1] = t.data[1];
  25     sret->data[2] = p;
  26     return sret;
  27 }