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/* { dg-do run } */
/* { dg-options "-O -fdump-tree-forwprop1" } */
struct Value
{
double value;
Value(double value_) : value (value_) {}
operator double() const { return value; }
Value& operator=(double other) { value = other; }
};
struct Ref
{
const Value& m;
Ref(const Value& m_) : m(m_) {}
operator double() const { return m; }
};
struct Diff
{
const Ref lhs, rhs;
Diff(const Value& lhs_, const Value& rhs_) : lhs(lhs_), rhs(rhs_) {}
operator double() const { return lhs - rhs; }
};
extern "C" void abort (void);
int main(int argc, char *argv[])
{
Value I(1), m(4);
for(int a = 0; a < 1000; a++)
m = Diff (I, m);
if (!(m / 4 == I))
abort ();
return 0;
}
/* Check that we forward propagated
D.2182_13 = (struct Ref *) &D.2137.lhs;
to
D.2182_13->lhs.m ={v} &I;
yielding
D.2137.lhs.m ={v} &I; */
/* { dg-final { scan-tree-dump-times "D\\\.....\\\..hs\\\.m =" 2 "forwprop1" } } */
/* { dg-final { cleanup-tree-dump "forwprop1" } } */
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