Exception for bug329 (missed optimization)

\[x \geq 0\]

Math

\[\tan^{-1} \left(\frac{y}{x}\right) \]

FPCore

(FPCore (x y) :precision binary64 (atan (/ y x)))

C

double code(double x, double y) {
	return atan((y / x));
}

Fortran

real(8) function code(x, y)
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    code = atan((y / x))
end function

Java

public static double code(double x, double y) {
	return Math.atan((y / x));
}

Python

def code(x, y):
	return math.atan((y / x))

Julia

function code(x, y)
	return atan(Float64(y / x))
end

MATLAB

function tmp = code(x, y)
	tmp = atan((y / x));
end

Wolfram

code[x_, y_] := N[ArcTan[N[(y / x), $MachinePrecision]], $MachinePrecision]

Reproduce

Please include this information when filing a bug report:

herbie shell --seed 2023241 
(FPCore (x y)
  :name "bug329 (missed optimization)"
  :precision binary64
  :pre (>= x 0.0)

  :herbie-target
  (atan2 y x)

  (atan (/ y x)))

Backtrace

match: no matching clause for 'ival		L	C
compile-progs	/home/nightlies/herbie/arb-support/src/programs.rkt	122	0
make-search-func	/home/nightlies/herbie/arb-support/src/ground-truth.rkt	20	0
sample-points	/home/nightlies/herbie/arb-support/src/ground-truth.rkt	64	0
setup-context!	/home/nightlies/herbie/arb-support/src/mainloop.rkt	293	0
get-alternatives/report	/home/nightlies/herbie/arb-support/src/sandbox.rkt	148	0
(unnamed)	/home/nightlies/herbie/arb-support/src/sandbox.rkt	247	6
(unnamed)	/usr/share/racket/pkgs/profile-lib/main.rkt	40	10
profile-thunk	/usr/share/racket/pkgs/profile-lib/main.rkt	9	0
(unnamed)	/usr/share/racket/collects/racket/engine.rkt	42	24