[gcc(refs/users/aoliva/heads/testme)] [strub] tolerate call_stmt-less cgraph_edges

[Alexandre Oliva]

https://gcc.gnu.org/g:88546c1d5326c907a9e38cd574423812c720f84a

commit 88546c1d5326c907a9e38cd574423812c720f84a
Author: Alexandre Oliva <oliva@adacore.com>
Date:   Thu Jun 8 01:44:03 2023 -0300

    [strub] tolerate call_stmt-less cgraph_edges
    
    cgraph::analyze creates cgraph_edges without call_stmt for thunks.
    Skip edges without a call_stmt all over.
    
    
    for  gcc/ChangeLog
    
            * ipa-strub.cc (calls_builtin_apply_args_p): Check for NULL
            call_stmt in cgraph_edges.
            (called_directly_with_type_override_p): Likewise.
            (can_strub_internally_p): Likewise.
            (distinctify_node_type): Likewise.
            (verify_strub): Likewise.
            (pass_ipa_strub::adjust_at_calls_calls): Likewise.
            (pass_ipa_strub::execute): Likewise.
            (pass_ipa_strub::adjust_at_calls_call): Require a call_stmt.

Diff:
---
 gcc/ipa-strub.cc | 28 +++++++++++++++++++++++++---
 1 file changed, 25 insertions(+), 3 deletions(-)

diff --git a/gcc/ipa-strub.cc b/gcc/ipa-strub.cc
index d61b7e2e36e..5fc4fca550d 100644
--- a/gcc/ipa-strub.cc
+++ b/gcc/ipa-strub.cc
@@ -489,7 +489,9 @@ calls_builtin_apply_args_p (cgraph_node *node, bool report = false)
       if (!report)
 	break;
 
-      sorry_at (gimple_location (e->call_stmt),
+      sorry_at (e->call_stmt
+		? gimple_location (e->call_stmt)
+		: DECL_SOURCE_LOCATION (node->decl),
 		"at-calls %<strub%> does not support call to %qD",
 		cdecl);
     }
@@ -607,7 +609,7 @@ static bool
 called_directly_with_type_override_p (cgraph_node *node, void *)
 {
   for (cgraph_edge *e = node->callers; e; e = e->next_caller)
-    if (strub_call_fntype_override_p (e->call_stmt))
+    if (e->call_stmt && strub_call_fntype_override_p (e->call_stmt))
       return true;
 
   return false;
@@ -694,7 +696,9 @@ can_strub_internally_p (cgraph_node *node, bool report = false)
 	  if (!report)
 	    return result;
 
-	  sorry_at (gimple_location (e->call_stmt),
+	  sorry_at (e->call_stmt
+		    ? gimple_location (e->call_stmt)
+		    : DECL_SOURCE_LOCATION (node->decl),
 		    "%qD is not eligible for internal %<strub%> "
 		    "because it calls %qD",
 		    node->decl, cdecl);
@@ -1428,6 +1432,8 @@ distinctify_node_type (cgraph_node *node)
      we'll adjust their fntypes then.  */
   for (cgraph_edge *e = node->callers; e; e = e->next_caller)
     {
+      if (!e->call_stmt)
+	continue;
       tree fnaddr = gimple_call_fn (e->call_stmt);
       gcc_checking_assert (TREE_CODE (fnaddr) == ADDR_EXPR
 			   && TREE_OPERAND (fnaddr, 0) == node->decl);
@@ -1494,6 +1500,9 @@ verify_strub ()
       {
 	gcc_checking_assert (e->indirect_unknown_callee);
 
+	if (!e->call_stmt)
+	  continue;
+
 	enum strub_mode callee_mode
 	  = effective_strub_mode_for_call (e->call_stmt, NULL);
 
@@ -1507,6 +1516,9 @@ verify_strub ()
       {
 	gcc_checking_assert (!e->indirect_unknown_callee);
 
+	if (!e->call_stmt)
+	  continue;
+
 	tree callee_fntype;
 	enum strub_mode callee_mode
 	  = effective_strub_mode_for_call (e->call_stmt, &callee_fntype);
@@ -2282,6 +2294,7 @@ void
 pass_ipa_strub::adjust_at_calls_call (cgraph_edge *e, int named_args,
 				      tree callee_fntype)
 {
+  gcc_checking_assert (e->call_stmt);
   gcall *ocall = e->call_stmt;
   gimple_stmt_iterator gsi = gsi_for_stmt (ocall);
 
@@ -2458,6 +2471,9 @@ pass_ipa_strub::adjust_at_calls_calls (cgraph_node *node)
 	{
 	  gcc_checking_assert (e->indirect_unknown_callee);
 
+	  if (!e->call_stmt)
+	    continue;
+
 	  tree callee_fntype;
 	  enum strub_mode callee_mode
 	    = effective_strub_mode_for_call (e->call_stmt, &callee_fntype);
@@ -2480,6 +2496,9 @@ pass_ipa_strub::adjust_at_calls_calls (cgraph_node *node)
 	{
 	  gcc_checking_assert (!e->indirect_unknown_callee);
 
+	  if (!e->call_stmt)
+	    continue;
+
 	  tree callee_fntype;
 	  enum strub_mode callee_mode
 	    = effective_strub_mode_for_call (e->call_stmt, &callee_fntype);
@@ -3283,6 +3302,9 @@ pass_ipa_strub::execute (function *)
 	  || is_stdarg || apply_args)
 	for (cgraph_edge *e = nnode->callees, *enext; e; e = enext)
 	  {
+	    if (!e->call_stmt)
+	      continue;
+
 	    gcall *call = e->call_stmt;
 	    gimple_stmt_iterator gsi = gsi_for_stmt (call);
 	    tree fndecl = e->callee->decl;