clang/test/CodeGen/sret.c

   1 // RUN: %clang_cc1 %s -Wno-strict-prototypes -emit-llvm -o - | FileCheck %s
   2
   3 struct abc {
   4  long a;
   5  long b;
   6  long c;
   7  long d;
   8  long e;
   9 };
  10
  11 struct abc foo1(void);
  12 // CHECK-DAG: declare {{.*}} @foo1(ptr dead_on_unwind writable sret(%struct.abc)
  13 struct abc foo2();
  14 // CHECK-DAG: declare {{.*}} @foo2(ptr dead_on_unwind writable sret(%struct.abc)
  15 struct abc foo3(void){}
  16 // CHECK-DAG: define {{.*}} @foo3(ptr dead_on_unwind noalias writable sret(%struct.abc)
  17
  18 void bar(void) {
  19   struct abc dummy1 = foo1();
  20   // CHECK-DAG: call {{.*}} @foo1(ptr dead_on_unwind writable sret(%struct.abc)
  21   struct abc dummy2 = foo2();
  22   // CHECK-DAG: call {{.*}} @foo2(ptr dead_on_unwind writable sret(%struct.abc)
  23 }