riscv: Fix r15-9270 fallout on RISC-V

On Wed, Apr 09, 2025 at 02:38:01PM +0200, Mark Wielaard wrote:
> Unfortunately this seems to have broken the riscv bootstrap:
> https://builder.sourceware.org/buildbot/#/builders/337/builds/105
>
> ../../gcc/gcc/config/riscv/riscv-vector-builtins.cc:4730:10: error: enumeration value ‘TCTX_OMP_MAP’ not handled in switch [-Werror=switch]
>  4730 |   switch (context)
>       |          ^
> ../../gcc/gcc/config/riscv/riscv-vector-builtins.cc:4730:10: error: enumeration value ‘TCTX_OMP_MAP_IMP_REF’ not handled in switch [-Werror=switch]
> ../../gcc/gcc/config/riscv/riscv-vector-builtins.cc:4730:10: error: enumeration value ‘TCTX_OMP_PRIVATE’ not handled in switch [-Werror=switch]
> ../../gcc/gcc/config/riscv/riscv-vector-builtins.cc:4730:10: error: enumeration value ‘TCTX_OMP_FIRSTPRIVATE’ not handled in switch [-Werror=switch]
> ../../gcc/gcc/config/riscv/riscv-vector-builtins.cc:4730:10: error: enumeration value ‘TCTX_OMP_DEVICE_ADDR’ not handled in switch [-Werror=switch]
> cc1plus: all warnings being treated as errors

Indeed, riscv-vector-builtins.cc IMHO needs pretty much the same
changes as aarch64, just with s/SVE/RVV/g.
I've also left out default: break; so that it is caught next time
somebody adds further enumerators.

2025-04-09  Jakub Jelinek  <jakub@redhat.com>

	* config/riscv/riscv-vector-builtins.cc (verify_type_context):
	Diagnose RVV types for a given OpenMP context.

1 files changed, 33 insertions, 1 deletions

diff --git a/gcc/config/riscv/riscv-vector-builtins.cc b/gcc/config/riscv/riscv-vector-builtins.cc
index d2fe849..61dcdab 100644
--- a/gcc/config/riscv/riscv-vector-builtins.cc
+++ b/gcc/config/riscv/riscv-vector-builtins.cc
@@ -4724,7 +4724,11 @@ bool
 verify_type_context (location_t loc, type_context_kind context, const_tree type,
 		     bool silent_p)
 {
-  if (!sizeless_type_p (type))
+  const_tree tmp = type;
+  if (omp_type_context (context) && POINTER_TYPE_P (type))
+    tmp = strip_pointer_types (tmp);
+
+  if (!sizeless_type_p (tmp))
     return true;
 
   switch (context)
@@ -4796,6 +4800,34 @@ verify_type_context (location_t loc, type_context_kind context, const_tree type,
 	error_at (loc, "capture by copy of RVV type %qT", type);
 
       return false;
+
+    case TCTX_OMP_MAP:
+      if (!silent_p)
+	error_at (loc, "RVV type %qT not allowed in %<map%> clause", type);
+      return false;
+
+    case TCTX_OMP_MAP_IMP_REF:
+      if (!silent_p)
+	error ("cannot reference %qT object types in %<target%> region", type);
+      return false;
+
+    case TCTX_OMP_PRIVATE:
+      if (!silent_p)
+	error_at (loc, "RVV type %qT not allowed in"
+		  " %<target%> %<private%> clause", type);
+      return false;
+
+    case TCTX_OMP_FIRSTPRIVATE:
+      if (!silent_p)
+	error_at (loc, "RVV type %qT not allowed in"
+		  " %<target%> %<firstprivate%> clause", type);
+      return false;
+
+    case TCTX_OMP_DEVICE_ADDR:
+      if (!silent_p)
+	error_at (loc, "RVV type %qT not allowed in"
+		  " %<target%> device clauses", type);
+      return false;
     }
 
   gcc_unreachable ();