libgomp: Use void (*) (void *) rather than void (*)() for host_fn type [PR114216]

For the type of the target callbacks we use elsehwere void (*) (void *) and
IMHO should use that for the reverse offload fallback as well (where the actual
callback is emitted using the same code as for host fallback or device kernel
entry routines), even when it is also ok to use void (*) () before C23 and
we aren't building libgomp with C23 yet.  On some arches perhaps void (*) ()
could result in worse code generation because calls in that case like casts
to unprototyped functions need to sometimes pass argument in two different spots
etc. so that it deals with both passing it through ... and as a named argument.

2024-03-04  Jakub Jelinek  <jakub@redhat.com>

	PR libgomp/114216
	* target.c (gomp_target_rev): Change host_fn type and corresponding
	cast from void (*)() to void (*) (void *).

diff --git a/libgomp/target.c b/libgomp/target.c
index 1367e9cce6c31784023a9e22f1f85336e0501805..bcc8605160142c79ff399b0e3b63053548427888 100644 (file)
--- a/libgomp/target.c
+++ b/libgomp/target.c
@@ -3447,7 +3447,7 @@ gomp_target_rev (uint64_t fn_ptr, uint64_t mapnum, uint64_t devaddrs_ptr,
 
   if (n == NULL)
     gomp_fatal ("Cannot find reverse-offload function");
-  void (*host_fn)() = (void (*)()) n->k->host_start;
+  void (*host_fn) (void *) = (void (*) (void *)) n->k->host_start;
 
   if ((devicep->capabilities & GOMP_OFFLOAD_CAP_SHARED_MEM) || mapnum == 0)
     {