Add some tests for numeric BIFs

1 files changed, 217 insertions, 0 deletions

diff --git a/lib/hipe/test/basic_SUITE_data/basic_num_bif.erl b/lib/hipe/test/basic_SUITE_data/basic_num_bif.erl
new file mode 100644
index 0000000000..807c4b0d0d
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+++ b/lib/hipe/test/basic_SUITE_data/basic_num_bif.erl
@@ -0,0 +1,217 @@
+%%% -*- erlang-indent-level: 2 -*-
+%%%-------------------------------------------------------------------
+%%% File	: basic_num_bif.erl
+%%% Description : Taken from the compiler test suite
+%%%-------------------------------------------------------------------
+-module(basic_num_bif).
+
+-export([test/0]).
+
+%% Tests optimization of the BIFs:
+%% 	abs/1
+%%	float/1
+%%	float_to_list/1
+%%	integer_to_list/1
+%%	list_to_float/1
+%%	list_to_integer/1
+%%	round/1
+%%	trunc/1
+
+test() -> 
+  Funs = [fun t_abs/0, fun t_float/0,
+	  fun t_float_to_list/0, fun t_integer_to_list/0,
+	  fun t_list_to_float_safe/0, fun t_list_to_float_risky/0,
+	  fun t_list_to_integer/0, fun t_round/0, fun t_trunc/0],
+  lists:foreach(fun (F) -> ok = F() end, Funs).
+
+t_abs() ->
+  %% Floats.
+  5.5 = abs(5.5),
+  0.0 = abs(0.0),
+  100.0 = abs(-100.0),
+  %% Integers.
+  5 = abs(5),
+  0 = abs(0),
+  100 = abs(-100),
+  %% The largest smallnum. OTP-3190.
+  X = (1 bsl 27) - 1,
+  X = abs(X),
+  X = abs(X-1)+1,
+  X = abs(X+1)-1,
+  X = abs(-X),
+  X = abs(-X-1)-1,
+  X = abs(-X+1)+1,
+  %% Bignums.
+  BigNum = 13984792374983749,
+  BigNum = abs(BigNum),
+  BigNum = abs(-BigNum),
+  ok.
+
+t_float() ->
+  0.0 = float(0),
+  2.5 = float(2.5),
+  0.0 = float(0.0),
+  -100.55 = float(-100.55),
+  42.0 = float(42),
+  -100.0 = float(-100),
+  %% Bignums.
+  4294967305.0 = float(4294967305),
+  -4294967305.0 = float(-4294967305),
+  %% Extremely big bignums.
+  Big = list_to_integer(lists:duplicate(2000, $1)),
+  {'EXIT', {badarg, _}} = (catch float(Big)),
+  ok.
+
+%% Tests float_to_list/1.
+
+t_float_to_list() ->
+  test_ftl("0.0e+0", 0.0),
+  test_ftl("2.5e+1", 25.0),
+  test_ftl("2.5e+0", 2.5),
+  test_ftl("2.5e-1", 0.25),
+  test_ftl("-3.5e+17", -350.0e15),
+  ok.
+
+test_ftl(Expect, Float) ->
+  %% No on the next line -- we want the line number from t_float_to_list.
+  Expect = remove_zeros(lists:reverse(float_to_list(Float)), []).
+
+%% Removes any non-significant zeros in a floating point number.
+%% Example: 2.500000e+01 -> 2.5e+1
+
+remove_zeros([$+, $e|Rest], [$0, X|Result]) ->
+  remove_zeros([$+, $e|Rest], [X|Result]);
+remove_zeros([$-, $e|Rest], [$0, X|Result]) ->
+  remove_zeros([$-, $e|Rest], [X|Result]);
+remove_zeros([$0, $.|Rest], [$e|Result]) ->
+  remove_zeros(Rest, [$., $0, $e|Result]);
+remove_zeros([$0|Rest], [$e|Result]) ->
+  remove_zeros(Rest, [$e|Result]);
+remove_zeros([Char|Rest], Result) ->
+  remove_zeros(Rest, [Char|Result]);
+remove_zeros([], Result) ->
+  Result.
+
+%% Tests integer_to_list/1.
+
+t_integer_to_list() ->
+  "0" = integer_to_list(0),
+  "42" = integer_to_list(42),
+  "-42" = integer_to_list(-42),
+  "-42" = integer_to_list(-42),
+  "32768" = integer_to_list(32768),
+  "268435455" = integer_to_list(268435455),
+  "-268435455" = integer_to_list(-268435455),
+  "123456932798748738738" = integer_to_list(123456932798748738738),
+  Big_List = lists:duplicate(2000, $1),
+  Big = list_to_integer(Big_List),
+  Big_List = integer_to_list(Big),
+  ok.
+
+%% Tests list_to_float/1.
+
+t_list_to_float_safe() ->
+  0.0 = list_to_float("0.0"),
+  0.0 = list_to_float("-0.0"),
+  0.5 = list_to_float("0.5"),
+  -0.5 = list_to_float("-0.5"),
+  100.0 = list_to_float("1.0e2"),
+  127.5 = list_to_float("127.5"),
+  -199.5 = list_to_float("-199.5"),
+  ok.
+
+%% This might crash the emulator...
+%% (Known to crash the Unix version of Erlang 4.4.1)
+
+t_list_to_float_risky() ->
+  Many_Ones = lists:duplicate(25000, $1),
+  _ = list_to_float("2."++Many_Ones),
+  {'EXIT', {badarg, _}} = (catch list_to_float("2"++Many_Ones)),
+  ok.
+
+%% Tests list_to_integer/1.
+
+t_list_to_integer() ->
+  0 = list_to_integer("0"),
+  0 = list_to_integer("00"),
+  0 = list_to_integer("-0"),
+  1 = list_to_integer("1"),
+  -1 = list_to_integer("-1"),
+  42 = list_to_integer("42"),
+  -12 = list_to_integer("-12"),
+  32768 = list_to_integer("32768"),
+  268435455 = list_to_integer("268435455"),
+  -268435455 = list_to_integer("-268435455"),
+  %% Bignums.
+  123456932798748738738 = list_to_integer("123456932798748738738"),
+  _ = list_to_integer(lists:duplicate(2000, $1)),
+  ok.
+
+%% Tests round/1.
+
+t_round() ->
+  0 = round(0.0),
+  0 = round(0.4),
+  1 = round(0.5),
+  0 = round(-0.4),
+  -1 = round(-0.5),
+  255 = round(255.3),
+  256 = round(255.6),
+  -1033 = round(-1033.3),
+  -1034 = round(-1033.6),
+  %% OTP-3722:
+  X = (1 bsl 27) - 1,
+  MX = -X,
+  MXm1 = -X-1,
+  MXp1 = -X+1,
+  F = X + 0.0,
+  X = round(F),
+  X = round(F+1)-1,
+  X = round(F-1)+1,
+  MX = round(-F),
+  MXm1 = round(-F-1),
+  MXp1 = round(-F+1),
+  X = round(F+0.1),
+  X = round(F+1+0.1)-1,
+  X = round(F-1+0.1)+1,
+  MX = round(-F+0.1),
+  MXm1 = round(-F-1+0.1),
+  MXp1 = round(-F+1+0.1),
+  X = round(F-0.1),
+  X = round(F+1-0.1)-1,
+  X = round(F-1-0.1)+1,
+  MX = round(-F-0.1),
+  MXm1 = round(-F-1-0.1),
+  MXp1 = round(-F+1-0.1),
+  0.5 = abs(round(F+0.5)-(F+0.5)),
+  0.5 = abs(round(F-0.5)-(F-0.5)),
+  0.5 = abs(round(-F-0.5)-(-F-0.5)),
+  0.5 = abs(round(-F+0.5)-(-F+0.5)),
+  %% Bignums.
+  4294967296 = round(4294967296.1),
+  4294967297 = round(4294967296.9),
+  -4294967296 = -round(4294967296.1),
+  -4294967297 = -round(4294967296.9),
+  ok.
+
+t_trunc() ->
+  0 = trunc(0.0),
+  5 = trunc(5.3333),
+  -10 = trunc(-10.978987),
+  %% The largest smallnum, converted to float (OTP-3722):
+  X = (1 bsl 27) - 1,
+  F = X + 0.0,
+  %%  io:format("X = ~p/~w/~w, F = ~p/~w/~w, trunc(F) = ~p/~w/~w~n",
+  %%	      [X, X, binary_to_list(term_to_binary(X)),
+  %%	       F, F, binary_to_list(term_to_binary(F)),
+  %%	       trunc(F), trunc(F), binary_to_list(term_to_binary(trunc(F)))]),
+  X = trunc(F),
+  X = trunc(F+1)-1,
+  X = trunc(F-1)+1,
+  X = -trunc(-F),
+  X = -trunc(-F-1)-1,
+  X = -trunc(-F+1)+1,
+  %% Bignums.
+  4294967305 = trunc(4294967305.7),
+  -4294967305 = trunc(-4294967305.7),
+  ok.