From f7fd259f27bce0058d996af6287e6bb81d12ea47 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Bj=C3=B6rn=20Gustavsson?= Date: Tue, 15 Sep 2015 16:50:19 +0200 Subject: sys_core_fold: Extend the list of BIFs that return integers Knowing that a BIF returns an integer makes it possible to replace '==' with the cheaper '=:=' test. --- lib/compiler/src/sys_core_fold.erl | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'lib/compiler/src') diff --git a/lib/compiler/src/sys_core_fold.erl b/lib/compiler/src/sys_core_fold.erl index 27d023d067..0a16776bd4 100644 --- a/lib/compiler/src/sys_core_fold.erl +++ b/lib/compiler/src/sys_core_fold.erl @@ -2793,12 +2793,18 @@ extract_type_1(Expr, Sub) -> true -> bool end. +returns_integer('band', [_,_]) -> true; +returns_integer('bnot', [_]) -> true; +returns_integer('bor', [_,_]) -> true; +returns_integer('bxor', [_,_]) -> true; returns_integer(bit_size, [_]) -> true; returns_integer('bsl', [_,_]) -> true; returns_integer('bsr', [_,_]) -> true; returns_integer(byte_size, [_]) -> true; +returns_integer('div', [_,_]) -> true; returns_integer(length, [_]) -> true; returns_integer('rem', [_,_]) -> true; +returns_integer('round', [_]) -> true; returns_integer(size, [_]) -> true; returns_integer(tuple_size, [_]) -> true; returns_integer(trunc, [_]) -> true; -- cgit v1.2.3