Hello,
The struct below is not initialized when using brace-initialization. This seems to be the same issue as reported here https://community.intel.com/t5/Intel-C-Compiler/Aggregate-initialization-bug-with-nested-struct/m-p/1271801. The members a through d should be initialized as int{} to 0. I assume it's related to the non-default constructor of Q, the values are uninitialized also with an std::vector member as in the linked post. The struct seems to be correctly zero initialized if there are no user-provided constructors.
Compiler version
cl6x --help TMS320C6x C/C++ Compiler v8.3.10 Tools Copyright (c) 1996-2018 Texas Instruments Incorporated
Compilation flags. Observed at O1/2/3
-qq -mv6600 --relaxed_ansi --define=SOC_TDA3XX --keep_unneeded_statics --diag_wrap=off --display_error_number --diag_suppress=556 --diag_suppress=2458 --mem_model:data=far --wchar_t=16 --fp_reassoc=off --float_operations_allowed=all --ramfunc=off --emit_warnings_as_errors -O3 --opt_for_speed=4 -DNDEBUG --symdebug:none --c++14
Code
#include <xdc/runtime/System.h>
#include <array>
class Q
{
public:
Q() : member{5} {}
int member;
};
struct A
{
int a;
int b;
int c;
int d;
};
struct B
{
A a;
Q q;
};
void modifyStack()
{
std::array<int, 16> values{};
for (int i = 0; i < values.size(); ++i)
{
values[i] = i;
}
}
void initializeAndPrint()
{
// Aggregate initialization with {}. dcl.init.aggr/7
// The members a,b,c,d are not initialized.
// The class member is initialized through default constructor.
B b{};
System_printf("b.a.a: %d\n", b.a.a);
System_printf("b.a.b: %d\n", b.a.b);
System_printf("b.a.c: %d\n", b.a.c);
System_printf("b.a.d: %d\n", b.a.d);
System_printf("b.q.member: %d\n", b.q.member);
}
void init()
{
modifyStack();
initializeAndPrint();
}Output
b.a.a: 12 b.a.b: 13 b.a.c: 14 b.a.d: 15 b.q.member: 5
