[gcc r11-6791] ipa/98330 - avoid ICEing on call indirect call

[Richard Biener]

https://gcc.gnu.org/g:66dd412feeab29783fcdcf7ab36f20c5dd7b2332

commit r11-6791-g66dd412feeab29783fcdcf7ab36f20c5dd7b2332
Author: Richard Biener <rguenther@suse.de>
Date:   Tue Jan 19 14:21:41 2021 +0100

    ipa/98330 - avoid ICEing on call indirect call
    
    The following avoids ICEing on a indirect calls with a fnspec
    in modref analysis.
    
    2021-01-19  Richard Biener  <rguenther@suse.de>
    
            PR ipa/98330
            * ipa-modref.c (analyze_stmt): Only record a summary for a
            direct call.
    
            * g++.dg/pr98330.C: New testcase.
            * gcc.dg/pr98330.c: Likewise.

Diff:
---
 gcc/ipa-modref.c               | 12 +++++++-----
 gcc/testsuite/g++.dg/pr98330.C |  7 +++++++
 gcc/testsuite/gcc.dg/pr98330.c |  7 +++++++
 3 files changed, 21 insertions(+), 5 deletions(-)

diff --git a/gcc/ipa-modref.c b/gcc/ipa-modref.c
index 74ad876cf58..8a5669c7f9b 100644
--- a/gcc/ipa-modref.c
+++ b/gcc/ipa-modref.c
@@ -1247,11 +1247,13 @@ analyze_stmt (modref_summary *summary, modref_summary_lto *summary_lto,
 	    && (!fnspec.global_memory_read_p ()
 		|| !fnspec.global_memory_written_p ()))
 	  {
-	    fnspec_summaries->get_create
-		 (cgraph_node::get (current_function_decl)->get_edge (stmt))
-			->fnspec = xstrdup (fnspec.get_str ());
-	    if (dump_file)
-	      fprintf (dump_file, "  Recorded fnspec %s\n", fnspec.get_str ());
+	    cgraph_edge *e = cgraph_node::get (current_function_decl)->get_edge (stmt);
+	    if (e->callee)
+	      {
+		fnspec_summaries->get_create (e)->fnspec = xstrdup (fnspec.get_str ());
+		if (dump_file)
+		  fprintf (dump_file, "  Recorded fnspec %s\n", fnspec.get_str ());
+	      }
 	  }
       }
      return true;
diff --git a/gcc/testsuite/g++.dg/pr98330.C b/gcc/testsuite/g++.dg/pr98330.C
new file mode 100644
index 00000000000..08bf77b5c4b
--- /dev/null
+++ b/gcc/testsuite/g++.dg/pr98330.C
@@ -0,0 +1,7 @@
+// { dg-do compile }
+// { dg-options -O2 }
+
+float f (float x)
+{
+  return __builtin_pow[1] (x, 2); // { dg-warning "pointer to a function used in arithmetic" }
+}
diff --git a/gcc/testsuite/gcc.dg/pr98330.c b/gcc/testsuite/gcc.dg/pr98330.c
new file mode 100644
index 00000000000..bc68a6fa214
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr98330.c
@@ -0,0 +1,7 @@
+/* { dg-do compile } */
+/* { dg-options "-O2" } */
+
+float f (__typeof (__builtin_pow) fn, float x)
+{
+  return fn (x, 2);
+}