[nvptx] Add type arg to TARGET_LIBC_HAS_FUNCTION

GCC has a target hook TARGET_LIBC_HAS_FUNCTION, which tells the compiler
which functions it can expect to be present in libc.

The default target hook does not include the sincos functions.

The nvptx port of newlib does include sincos and sincosf, but not sincosl.

The target hook TARGET_LIBC_HAS_FUNCTION does not distinguish between sincos,
sincosf and sincosl, so if we enable it for the sincos functions, then for
test.c:
...
long double x, a, b;
int main (void) {
  x = 0.5;
  a = sinl (x);
  b = cosl (x);
  printf ("a: %f\n", (double)a);
  printf ("b: %f\n", (double)b);
  return 0;
}
...
we introduce a regression:
...
$ gcc test.c -lm -O2
unresolved symbol sincosl
collect2: error: ld returned 1 exit status
...

Add a type argument to target hook TARGET_LIBC_HAS_FUNCTION_TYPE, and use it
in nvptx_libc_has_function_type to enable sincos and sincosf, but not sincosl.

Build and reg-tested on x86_64-linux.

Build and tested on nvptx.

gcc/ChangeLog:

2020-09-28  Tobias Burnus  <tobias@codesourcery.com>
	    Tom de Vries  <tdevries@suse.de>

	* builtins.c (expand_builtin_cexpi, fold_builtin_sincos): Update
	targetm.libc_has_function call.
	* builtins.def (DEF_C94_BUILTIN, DEF_C99_BUILTIN, DEF_C11_BUILTIN):
	(DEF_C2X_BUILTIN, DEF_C99_COMPL_BUILTIN, DEF_C99_C90RES_BUILTIN):
	Same.
	* config/darwin-protos.h (darwin_libc_has_function): Update prototype.
	* config/darwin.c (darwin_libc_has_function): Add arg.
	* config/linux-protos.h (linux_libc_has_function): Update prototype.
	* config/linux.c (linux_libc_has_function): Add arg.
	* config/i386/i386.c (ix86_libc_has_function): Update
	targetm.libc_has_function call.
	* config/nvptx/nvptx.c (nvptx_libc_has_function): New function.
	(TARGET_LIBC_HAS_FUNCTION): Redefine to nvptx_libc_has_function.
	* convert.c (convert_to_integer_1): Update targetm.libc_has_function
	call.
	* match.pd: Same.
	* target.def (libc_has_function): Add arg.
	* doc/tm.texi: Regenerate.
	* targhooks.c (default_libc_has_function, gnu_libc_has_function)
	(no_c99_libc_has_function): Add arg.
	* targhooks.h (default_libc_has_function, no_c99_libc_has_function)
	(gnu_libc_has_function): Update prototype.
	* tree-ssa-math-opts.c (pass_cse_sincos::execute): Update
	targetm.libc_has_function call.

gcc/fortran/ChangeLog:

2020-09-30  Tom de Vries  <tdevries@suse.de>

	* f95-lang.c (gfc_init_builtin_functions):  Update
	targetm.libc_has_function call.

1 files changed, 6 insertions, 3 deletions

diff --git a/gcc/targhooks.c b/gcc/targhooks.c
index da4805d..5d94fce 100644
--- a/gcc/targhooks.c
+++ b/gcc/targhooks.c
@@ -1641,7 +1641,8 @@ default_have_conditional_execution (void)
 /* By default we assume that c99 functions are present at the runtime,
    but sincos is not.  */
 bool
-default_libc_has_function (enum function_class fn_class)
+default_libc_has_function (enum function_class fn_class,
+			   tree type ATTRIBUTE_UNUSED)
 {
   if (fn_class == function_c94
       || fn_class == function_c99_misc
@@ -1660,13 +1661,15 @@ default_libc_has_fast_function (int fcode ATTRIBUTE_UNUSED)
 }
 
 bool
-gnu_libc_has_function (enum function_class fn_class ATTRIBUTE_UNUSED)
+gnu_libc_has_function (enum function_class fn_class ATTRIBUTE_UNUSED,
+		       tree type ATTRIBUTE_UNUSED)
 {
   return true;
 }
 
 bool
-no_c99_libc_has_function (enum function_class fn_class ATTRIBUTE_UNUSED)
+no_c99_libc_has_function (enum function_class fn_class ATTRIBUTE_UNUSED,
+			  tree type ATTRIBUTE_UNUSED)
 {
   return false;
 }