Reduced test case:
typedef __uint128_t vint128_t __attribute__((vector_size(16)));
vint128_t z;
int x, y;
void fn2(void);
void fn1(void)
{
vint128_t c;
y = 1000;
for (; y; y--) {
c = c ^ x;
z -= c;
z ^= x;
c = c ^ x;
}
fn2();
}
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https://bugs.launchpad.net/bugs/1673434
Title:
gcc 5.4.0-6ubuntu1~16.04.4 internal compiler error: in
simplify_binary_operation_1, at simplify-rtx.c:3619
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