commit ad42dcf501e41713047cf6c47cbb1dd9f01088a4
Author: Richard Biener <rguenther@suse.de>
Date:   Mon Aug 21 09:01:00 2023 +0200

    tree-optimization/111070 - fix ICE with recent ifcombine fix
    
    We now got test coverage for non-SSA name bits so the following amends
    the SSA_NAME_OCCURS_IN_ABNORMAL_PHI checks.
    
            PR tree-optimization/111070
            * tree-ssa-ifcombine.cc (ifcombine_ifandif): Check we have
            an SSA name before checking SSA_NAME_OCCURS_IN_ABNORMAL_PHI.
    
            * gcc.dg/pr111070.c: New testcase.
    
    (cherry picked from commit 966b0a96523fb7adbf498ac71df5e033c70dc546)

diff --git a/gcc/testsuite/gcc.dg/pr111070.c b/gcc/testsuite/gcc.dg/pr111070.c
new file mode 100644
index 00000000000..1ebc7adf782
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr111070.c
@@ -0,0 +1,20 @@
+/* { dg-do compile } */
+/* { dg-options "-O" } */
+
+/* common */
+char c;
+/* arrays must be 8 byte aligned, regardless of size */
+char c_ary[1];
+
+/* data */
+char d = 1;
+char d_ary[1] = {1};
+
+int main ()
+{
+  if (((unsigned long)&c_ary[0] & 7) != 0)
+    return 1;
+  if (((unsigned long)&d_ary[0] & 7) != 0)
+    return 1;
+  return 0;
+}
--- a/gcc/tree-ssa-ifcombine.c
+++ b/gcc/tree-ssa-ifcombine.c
@@ -436,7 +436,8 @@ ifcombine_ifandif (basic_block inner_cond_bb, bool inner_inv,
     {
       tree t, t2;
 
-      if (SSA_NAME_OCCURS_IN_ABNORMAL_PHI (name1))
+      if (TREE_CODE (name1) == SSA_NAME
+	  && SSA_NAME_OCCURS_IN_ABNORMAL_PHI (name1))
 	return false;
 
       /* Do it.  */
@@ -495,8 +496,10 @@ ifcombine_ifandif (basic_block inner_cond_bb, bool inner_inv,
       gimple_stmt_iterator gsi;
       tree t;
 
-      if (SSA_NAME_OCCURS_IN_ABNORMAL_PHI (name1)
-	  || SSA_NAME_OCCURS_IN_ABNORMAL_PHI (name2))
+      if ((TREE_CODE (name1) == SSA_NAME
+	   && SSA_NAME_OCCURS_IN_ABNORMAL_PHI (name1))
+	  || (TREE_CODE (name2) == SSA_NAME
+	      && SSA_NAME_OCCURS_IN_ABNORMAL_PHI (name2)))
 	return false;
 
       /* Find the common name which is bit-tested.  */