[PATCH] Fix condition in lto-symtab.c (PR lto/88077).

[Martin Liška]

Hi.

This patch fixes what I screwed in r256989, where I wrongly replaced
TREE_CODE (TREE_TYPE (decl)) with TYPE_SIZE (decl), which is wrong.

Patch survives testing on x86_64-linux-gnu.

Ready for trunk?
Thanks,
Martin

gcc/lto/ChangeLog:

2018-11-19  Martin Liska  <mli...@suse.cz>

        PR lto/88077
        * lto-symtab.c (lto_symtab_merge): Transform the
        condition before r256989.

gcc/testsuite/ChangeLog:

2018-11-19  Martin Liska  <mli...@suse.cz>

        PR lto/88077
        * gcc.dg/lto/pr88077_0.c: New test.
        * gcc.dg/lto/pr88077_1.c: New test.
---
 gcc/lto/lto-symtab.c                 | 5 +++--
 gcc/testsuite/gcc.dg/lto/pr88077_0.c | 3 +++
 gcc/testsuite/gcc.dg/lto/pr88077_1.c | 6 ++++++
 3 files changed, 12 insertions(+), 2 deletions(-)
 create mode 100644 gcc/testsuite/gcc.dg/lto/pr88077_0.c
 create mode 100644 gcc/testsuite/gcc.dg/lto/pr88077_1.c



diff --git a/gcc/lto/lto-symtab.c b/gcc/lto/lto-symtab.c
index 18437eb2841..d018a16bd42 100644
--- a/gcc/lto/lto-symtab.c
+++ b/gcc/lto/lto-symtab.c
@@ -374,8 +374,9 @@ lto_symtab_merge (symtab_node *prevailing, symtab_node *entry)
 	 int a[]={1,2,3};
 	 here the first declaration is COMMON
 	 and sizeof(a) == sizeof (int).  */
-	else if (TREE_CODE (type) == ARRAY_TYPE)
-	  return (TYPE_SIZE (decl) == TYPE_SIZE (TREE_TYPE (type)));
+	else if (TREE_CODE (type) != ARRAY_TYPE
+		 || (TYPE_SIZE (type) != TYPE_SIZE (TREE_TYPE (type))))
+	  return false;
       }
 
   return true;
diff --git a/gcc/testsuite/gcc.dg/lto/pr88077_0.c b/gcc/testsuite/gcc.dg/lto/pr88077_0.c
new file mode 100644
index 00000000000..9e464b6ad4a
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/lto/pr88077_0.c
@@ -0,0 +1,3 @@
+/* { dg-lto-do link } */
+
+int HeaderStr;
diff --git a/gcc/testsuite/gcc.dg/lto/pr88077_1.c b/gcc/testsuite/gcc.dg/lto/pr88077_1.c
new file mode 100644
index 00000000000..fd3de3e77a6
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/lto/pr88077_1.c
@@ -0,0 +1,6 @@
+char HeaderStr[1];
+
+int main()
+{
+  return 0;
+}