1 // RUN: %clang_cc1 -triple mips64-linux-gnu -S -o - -emit-llvm %s | FileCheck %s 2 // 3 // Transparent unions are passed according to the calling convention rules of 4 // the first member. In this case, it is as if it were a void pointer so we 5 // do not have the inreg attribute we would normally have for unions. 6 // 7 // This comes up in glibc's wait() function and matters for the big-endian N32 8 // case where pointers are promoted to i64 and a non-transparent union would be 9 // passed in the upper 32-bits of an i64. 10 11 union either_pointer { 12 void *void_ptr; 13 int *int_ptr; 14 } __attribute__((transparent_union)); 15 16 extern void foo(union either_pointer p); 17 18 int data; 19 20 void bar(void) { 21 return foo(&data); 22 } 23 24 // CHECK-LABEL: define void @bar() 25 // CHECK: call void @foo(i8* %{{[0-9]+}}) 26 27 // CHECK: declare void @foo(i8*) 28
