[EXT_EP-8756] Internal error when passing a temporary array of objects - Software Issue Report (SIR)

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Product:
Code Generation Tools
Internal ID:
CODEGEN-4298
Found In Release:

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ARM_18.1.0.LTS
C2000_22.6.0.LTS
ARM_18.12.0.LTS
C2000_21.6.0.LTS
ARM_20.2.0.LTS
C2000_20.2.0.LTS

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ARM_18.1.0.LTS C2000_22.6.0.LTS ARM_18.12.0.LTS C2000_21.6.0.LTS ARM_20.2.0.LTS C2000_20.2.0.LTS
Release Notes:

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The following example code exhibits an internal compiler error caused by passing a temporary C array as an argument to a function taking an rvalue reference to an array:

struct S {
    int m;
    S(int i=1) : m(i) {}
    operator int() { return m; }
    int operator +(const S& r) { return m+r.m; }
};

int f00(S (&&r)[3]) { return r[0] + r[1] + r[2]; }

int main(void) {
        int g;
        S a(97), b(2), c(1);
        g = f00({a, b, c});
}

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The following example code exhibits an internal compiler error caused by passing a temporary C array as an argument to a function taking an rvalue reference to an array: struct S {     int m;     S(int i=1) : m(i) {}     operator int() { return m; }     int operator +(const S& r) { return m+r.m; } }; int f00(S (&&r)[3]) { return r[0] + r[1] + r[2]; } int main(void) {         int g;         S a(97), b(2), c(1);         g = f00({a, b, c}); }

The following code will crash the compiler during the code generator's decomposition pass:

#include <initializer_list>
#include <stdio.h>
struct S {
int m;
S(int i=1) : m {}
operator int()

{ return m; }

int operator +(const S& r)

{ return m+r.m; }

};
int f00(S (&&r)[3])

{ return r[0] + r[1] + r[2]; }

int main(void)
{
int x, g;
x = 100;
g = f00(

{97, 2 }

);
if (g != x)
printf("Got %d instead of %d", g, x);
return (2);
}
when compiled with:

> armcl -mv7m4 --abi=eabi -g --cpp_default -c test.cpp
Removing the debug option will make the decomp crash go away.