Unbox floor/ceiling and trigonometric functions where possible

* libguile/intrinsics.c (scm_atan1): New intrinsic, wrapping scm_atan.
  (scm_bootstrap_intrinsics): Add new intrinsics.
* libguile/intrinsics.h (scm_t_f64_from_f64_f64_intrinsic): New
  intrinsic type.
  (SCM_FOR_ALL_VM_INTRINSICS): Add intrinsics for floor, ceiling, sin,
  cos, tan, asin, acos, atan, and their unboxed counterparts.
* libguile/jit.c (sp_f64_operand): New helper.
  (compile_call_f64_from_f64, compile_call_f64_from_f64_f64): Call out
  to intrinsics.
* libguile/vm-engine.c (call-f64<-f64-f64): New opcode.
* module/language/cps/effects-analysis.scm: Add new intrinsics.
* module/language/cps/reify-primitives.scm (compute-known-primitives):
  Add new intrinsics.
* module/language/cps/slot-allocation.scm (compute-var-representations):
  Add 'f64 slot types for the new unboxed intrinsics.
* module/language/cps/specialize-numbers.scm (specialize-operations):
  Support unboxing the new intrinsics.
* module/language/cps/types.scm: Define type inferrers for the new
  intrinsics.
* module/language/tree-il/cps-primitives.scm: Define CPS translations
  for the new intrinsics.
* module/language/tree-il/primitives.scm (*interesting-primitive-names*):
  (*effect-free-primitives*, atan): Define primitive resolvers.
* module/system/vm/assembler.scm: Export assemblers for the new
  intrinsics.
  (define-f64<-f64-f64-intrinsic): New helper.

module/language/cps/reify-primitives.scm

@@ -1,6 +1,6 @@
 ;;; Continuation-passing style (CPS) intermediate language (IL)
 
-;; Copyright (C) 2013, 2014, 2015, 2017, 2018 Free Software Foundation, Inc.
+;; Copyright (C) 2013-2019 Free Software Foundation, Inc.
 
 ;;;; This library is free software; you can redistribute it and/or
 ;;;; modify it under the terms of the GNU Lesser General Public
@@ -316,8 +316,26 @@
       mod
       sqrt
       abs
+      floor
+      ceiling
+      sin
+      cos
+      tan
+      asin
+      acos
+      atan
+      atan2
       fsqrt
       fabs
+      ffloor
+      fceiling
+      fsin
+      fcos
+      ftan
+      fasin
+      facos
+      fatan
+      fatan2
       logand
       logior
       logxor