[gcc r12-5822] x86: Check FUNCTION_DECL before calling cgraph_node::get

[gcc r12-5822] x86: Check FUNCTION_DECL before calling cgraph_node::get

[H.J. Lu]

https://gcc.gnu.org/g:7ef68c37b3a46e69ed4a5ff6b2b368e2c9a8023f

commit r12-5822-g7ef68c37b3a46e69ed4a5ff6b2b368e2c9a8023f
Author: H.J. Lu <hjl.tools@gmail.com>
Date:   Tue Dec 7 05:09:34 2021 -0800

    x86: Check FUNCTION_DECL before calling cgraph_node::get
    
    gcc/
    
            PR target/103594
            * config/i386/i386.c (ix86_call_use_plt_p): Check FUNCTION_DECL
            before calling cgraph_node::get.
    
    gcc/testsuite/
    
            PR target/103594
            * gcc.dg/pr103594.c: New test.

Diff:
---
 gcc/config/i386/i386.c          |  3 ++-
 gcc/testsuite/gcc.dg/pr103594.c | 14 ++++++++++++++
 2 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c
index 52547b0f057..f1e41fd55f9 100644
--- a/gcc/config/i386/i386.c
+++ b/gcc/config/i386/i386.c
@@ -15987,7 +15987,8 @@ ix86_call_use_plt_p (rtx call_op)
 {
   if (SYMBOL_REF_LOCAL_P (call_op))
     {
-      if (SYMBOL_REF_DECL (call_op))
+      if (SYMBOL_REF_DECL (call_op)
+	  && TREE_CODE (SYMBOL_REF_DECL (call_op)) == FUNCTION_DECL)
 	{
 	  /* NB: All ifunc functions must be called via PLT.  */
 	  cgraph_node *node
diff --git a/gcc/testsuite/gcc.dg/pr103594.c b/gcc/testsuite/gcc.dg/pr103594.c
new file mode 100644
index 00000000000..0eae239eea0
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr103594.c
@@ -0,0 +1,14 @@
+/* { dg-do compile { target fpic } } */
+/* { dg-options "-O1 -fpic" } */
+
+int regex_subst(void)
+{
+  const void *subst = "";
+  return (*(int (*)(int))subst) (0);
+}
+
+int foobar (void)
+{
+  int x;
+  return (*(int (*)(void))&x) ();
+}