Avoid ICE in except.cc on targets that don't support exceptions.

A number of testcases currently fail on nvptx with the ICE:

during RTL pass: final
openmp-simd-2.c: In function 'foo':
openmp-simd-2.c:28:1: internal compiler error: in get_personality_function, at expr.cc:14037
   28 | }
      | ^
0x98a38f get_personality_function(tree_node*)
        /home/roger/GCC/nvptx-none/gcc/gcc/expr.cc:14037
0x969d3b output_function_exception_table(int)
        /home/roger/GCC/nvptx-none/gcc/gcc/except.cc:3226
0x9b760d rest_of_handle_final
        /home/roger/GCC/nvptx-none/gcc/gcc/final.cc:4252

The simple oversight in output_function_exception_table is that it calls
get_personality_function (immediately) before checking the target's
except_unwind_info hook (which on nvptx always returns UI_NONE).
The (perhaps obvious) fix is to move the assignments of fname and
personality after the tests that they are needed, and before their
first use.

2024-05-22  Roger Sayle  <roger@nextmovesoftware.com>

gcc/ChangeLog
	* except.cc (output_function_exception_table): Move call to
	get_personality_function after targetm_common.except_unwind_info
	check, to avoid ICE on targets that don't support exceptions.

diff --git a/gcc/except.cc b/gcc/except.cc
index 2080fcc22e624de2df21dd57ff8c7853ab6c12d8..b5886e97be9ce005157a9a91ac95d288bb5b517c 100644 (file)
--- a/gcc/except.cc
+++ b/gcc/except.cc
@@ -3222,9 +3222,6 @@ output_one_function_exception_table (int section)
 void
 output_function_exception_table (int section)
 {
-  const char *fnname = get_fnname_from_decl (current_function_decl);
-  rtx personality = get_personality_function (current_function_decl);
-
   /* Not all functions need anything.  */
   if (!crtl->uses_eh_lsda
       || targetm_common.except_unwind_info (&global_options) == UI_NONE)
@@ -3234,6 +3231,9 @@ output_function_exception_table (int section)
   if (section == 1 && !crtl->eh.call_site_record_v[1])
     return;
 
+  const char *fnname = get_fnname_from_decl (current_function_decl);
+  rtx personality = get_personality_function (current_function_decl);
+
   if (personality)
     {
       assemble_external_libcall (personality);