[Bug target/15492] floating-point arguments are loaded too early to x87 stack

[ubizjak at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=15492

--- Comment #13 from Uroš Bizjak <ubizjak at gmail dot com> ---
Recent gcc generates:

testcase from Comment #0:

double test (double a, double b)
{
        return a*a + b*b;
}

        fldl    4(%esp)
        fmul    %st(0), %st
        fldl    12(%esp)
        fmul    %st(0), %st
        faddp   %st, %st(1)
        ret

first testcase from Comment #3:

double test1 (double a, int x, double b, int y, double c)
{
        return sin (c) + tan (b) * sqrt (a) + x * fabs (b) + y;
}

        fldl    28(%esp)
        fsin
        fldl    16(%esp)
        fptan
        fstp    %st(0)
        fldl    4(%esp)
        fsqrt
        fldl    16(%esp)
        fabs
        fimull  12(%esp)
        fiaddl  24(%esp)
        faddp   %st, %st(3)
        fmulp   %st, %st(1)
        faddp   %st, %st(1)
        ret

second testcase from comment #3:

double test1 (double y, double x)
{
        return atan2(x, y);
}

        fldl    12(%esp)
        fldl    4(%esp)
        fpatan
        ret