[gcc(refs/vendors/ARM/heads/arm-struct-reorg-wip)] Abort if unknown syntax is encountered

[gcc(refs/vendors/ARM/heads/arm-struct-reorg-wip)] Abort if unknown syntax is encountered

[Erick Ochoa Lopez]

https://gcc.gnu.org/g:9048cc889bcfa93f91b7f417dd040be5162229dd

commit 9048cc889bcfa93f91b7f417dd040be5162229dd
Author: Erick Ochoa <erick.ochoa@theobroma-systems.com>
Date:   Sun Aug 30 10:21:35 2020 +0200

    Abort if unknown syntax is encountered

Diff:
---
 gcc/ipa-field-reorder.c        |  3 ++-
 gcc/ipa-type-escape-analysis.c | 27 +++++++++++++++++++++++++--
 gcc/ipa-type-escape-analysis.h |  2 ++
 3 files changed, 29 insertions(+), 3 deletions(-)

diff --git a/gcc/ipa-field-reorder.c b/gcc/ipa-field-reorder.c
index f67928f012f..2f4b7942966 100644
--- a/gcc/ipa-field-reorder.c
+++ b/gcc/ipa-field-reorder.c
@@ -587,6 +587,7 @@ lto_fr_execute ()
 {
   log ("here in field reordering \n");
   // Analysis.
+  detected_incompatible_syntax = false;
   tpartitions_t escaping_nonescaping_sets
     = partition_types_into_escaping_nonescaping ();
   record_field_map_t record_field_map = find_fields_accessed ();
@@ -594,7 +595,7 @@ lto_fr_execute ()
     = obtain_nonescaping_unaccessed_fields (escaping_nonescaping_sets,
 					    record_field_map, 0);
 
-  if (record_field_offset_map.empty ())
+  if (detected_incompatible_syntax || record_field_offset_map.empty ())
     return 0;
 
   // Prepare for transformation.
diff --git a/gcc/ipa-type-escape-analysis.c b/gcc/ipa-type-escape-analysis.c
index d5f03794fdd..a23d1810929 100644
--- a/gcc/ipa-type-escape-analysis.c
+++ b/gcc/ipa-type-escape-analysis.c
@@ -170,6 +170,10 @@ along with GCC; see the file COPYING3.  If not see
 #include "ipa-type-escape-analysis.h"
 #include "ipa-dfe.h"
 
+#define ABORT_IF_NOT_C true
+
+bool detected_incompatible_syntax = false;
+
 // Main function that drives dfe.
 static unsigned int
 lto_dfe_execute ();
@@ -256,13 +260,14 @@ static void
 lto_dead_field_elimination ()
 {
   // Analysis.
+  detected_incompatible_syntax = false;
   tpartitions_t escaping_nonescaping_sets
     = partition_types_into_escaping_nonescaping ();
   record_field_map_t record_field_map = find_fields_accessed ();
   record_field_offset_map_t record_field_offset_map
     = obtain_nonescaping_unaccessed_fields (escaping_nonescaping_sets,
 					    record_field_map, OPT_Wdfa);
-  if (record_field_offset_map.empty ())
+  if (detected_incompatible_syntax || record_field_offset_map.empty ())
     return;
 
     // Prepare for transformation.
@@ -669,7 +674,11 @@ TypeWalker::_walk (const_tree type)
     default:
       {
 	log ("missing %s\n", get_tree_code_name (code));
+#ifdef ABORT_IF_NOT_C
+	detected_incompatible_syntax = true;
+#else
 	gcc_unreachable ();
+#endif
       }
       break;
     }
@@ -936,7 +945,11 @@ ExprWalker::_walk (const_tree e)
     default:
       {
 	log ("missing %s\n", get_tree_code_name (code));
+#ifdef ABORT_IF_NOT_C
+	detected_incompatible_syntax = true;
+#else
 	gcc_unreachable ();
+#endif
       }
       break;
     }
@@ -1415,7 +1428,11 @@ GimpleWalker::_walk_gimple (gimple *stmt)
   // Break if something is unexpected.
   const char *name = gimple_code_name[code];
   log ("gimple code name %s\n", name);
+#ifdef ABORT_IF_NOT_C
+  detected_incompatible_syntax = true;
+#else
   gcc_unreachable ();
+#endif
 }
 
 void
@@ -3216,7 +3233,12 @@ TypeStructuralEquality::_equal (const_tree l, const_tree r)
       TSE_CASE (FUNCTION_TYPE);
       TSE_CASE (METHOD_TYPE);
     default:
-      gcc_unreachable ();
+#ifdef ABORT_IF_NOT_C
+	detected_incompatible_syntax = true;
+	return false;
+#else
+	gcc_unreachable ();
+#endif
       break;
     }
 
@@ -3415,3 +3437,4 @@ make_pass_ipa_type_escape_analysis (gcc::context *ctx)
 {
   return new pass_ipa_type_escape_analysis (ctx);
 }
+
diff --git a/gcc/ipa-type-escape-analysis.h b/gcc/ipa-type-escape-analysis.h
index 5faa723a6a6..8b9911ace1e 100644
--- a/gcc/ipa-type-escape-analysis.h
+++ b/gcc/ipa-type-escape-analysis.h
@@ -1165,4 +1165,6 @@ obtain_nonescaping_unaccessed_fields (tpartitions_t casting,
 				      record_field_map_t record_field_map,
 				      int warning);
 
+extern bool detected_incompatible_syntax;
+
 #endif /* GCC_IPA_TYPE_ESCAPE_ANALYSIS_H */