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/* { dg-do compile { target { musttail && { c || c++11 } } } } */
/* { dg-options "-Wextra" } */
int foo (int, void *);
int bar (int, int *);
struct S { int a, b, c; };
struct T { int d; struct S e; };
int
baz (int x, void *y)
{
[[gnu::musttail]] return bar (2, &x); /* { dg-warning "address of parameter 'x' passed to 'musttail' call argument" } */
}
int
qux (int x, void *y)
{
__label__ lab;
lab:;
if (*(int *) y == 1)
[[gnu::musttail]] return foo (1, &&lab); /* { dg-warning "address of label passed to 'musttail' call argument" } */
if (x == 1)
[[gnu::musttail]] return foo (3, 0);
else if (x == 2)
{
{
int a = 42;
bar (4, &a);
}
[[gnu::musttail]] return bar (5, 0);
}
else if (x == 3)
{
int a = 42;
bar (4, &a);
[[gnu::musttail]] return bar (6, 0); /* { dg-warning "address of automatic variable 'a' can escape to 'musttail' call" } */
}
else if (x == 4)
{
int a = 42;
[[gnu::musttail]] return bar (7, &a); /* { dg-warning "address of automatic variable 'a' passed to 'musttail' call argument" } */
}
else if (x == 5)
{
struct T b;
[[gnu::musttail]] return bar (8, &b.e.b); /* { dg-warning "address of automatic variable 'b' passed to 'musttail' call argument" } */
}
else if (x == 6)
{
struct T b;
bar (9, &b.e.a);
[[gnu::musttail]] return bar (10, 0); /* { dg-warning "address of automatic variable 'b' can escape to 'musttail' call" } */
}
else if (x == 7)
{
{
struct T b;
bar (9, &b.e.a);
}
[[gnu::musttail]] return bar (11, 0);
}
else if (x == 8)
{
{
int a = 42;
bar (4, &a);
}
[[gnu::musttail]] return foo (12, 0);
}
else if (x == 9)
{
int a = 42;
bar (4, &a);
[[gnu::musttail]] return foo (13, 0); /* { dg-warning "address of automatic variable 'a' can escape to 'musttail' call" } */
}
else if (x == 10)
{
int a = 42;
[[gnu::musttail]] return foo (14, &a); /* { dg-warning "address of automatic variable 'a' passed to 'musttail' call argument" } */
}
else if (x == 11)
{
struct T b;
[[gnu::musttail]] return foo (15, &b.e.b); /* { dg-warning "address of automatic variable 'b' passed to 'musttail' call argument" } */
}
else if (x == 12)
{
struct T b;
bar (9, &b.e.a);
[[gnu::musttail]] return foo (16, 0); /* { dg-warning "address of automatic variable 'b' can escape to 'musttail' call" } */
}
else if (x == 13)
{
{
struct T b;
bar (9, &b.e.a);
}
[[gnu::musttail]] return foo (17, 0);
}
return 0;
}
int
corge (int x, void *y)
{
if (*(int *) y == 1)
bar (18, &x);
[[gnu::musttail]] return bar (2, 0); /* { dg-warning "address of parameter 'x' can escape to 'musttail' call" } */
}
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