re PR tree-optimization/88855 (ICE: verify_ssa failed (error:…

re PR tree-optimization/88855 (ICE: verify_ssa failed (error: SSA_NAME_OCCURS_IN_ABNORMAL_PHI should be set))

2019-01-15  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/88855
	* tree-if-conv.c (combine_blocks): Collect
	SSA_NAME_OCCURS_IN_ABNORMAL_PHI from propagated out virtuals.

	* gcc.dg/pr88855.c: New testcase.

From-SVN: r267939

gcc/ChangeLog

+2019-01-15  Richard Biener  <rguenther@suse.de>
+
+	PR tree-optimization/88855
+	* tree-if-conv.c (combine_blocks): Collect
+	SSA_NAME_OCCURS_IN_ABNORMAL_PHI from propagated out virtuals.
+
 2019-01-15  Tom de Vries  <tdevries@suse.de>
 
 	PR target/80547

gcc/testsuite/ChangeLog

+2019-01-15  Richard Biener  <rguenther@suse.de>
+
+	PR tree-optimization/88855
+	* gcc.dg/pr88855.c: New testcase.
+
 2019-01-15  Paolo Carlini  <paolo.carlini@oracle.com>
 
 	* g++.dg/diagnostic/typedef-initialized.C: New.

gcc/testsuite/gcc.dg/pr88855.c

+/* { dg-do compile } */
+/* { dg-options "-O -ftree-loop-if-convert -ftree-vrp -fno-tree-copy-prop -fno-tree-dce -fno-tree-dominator-opts" } */
+
+typedef int jmp_buf[1];
+
+extern void exit(int) __attribute__((__noreturn__));
+extern int setjmpx(jmp_buf) __attribute__((__returns_twice__));
+
+jmp_buf jbAnagram;
+int a[6];
+int d;
+int b () { exit (1); }
+int c () { b (); }
+int e ()
+{
+  int f = 0;
+  for (; f < 6; f++)
+    a[f] = d;
+  c ();
+  setjmpx (jbAnagram);
+}

gcc/tree-if-conv.c

@@ -2633,6 +2633,8 @@ combine_blocks (struct loop *loop)
 	      FOR_EACH_IMM_USE_ON_STMT (use_p, iter)
 		SET_USE (use_p, last_vdef);
 	    }
+	  if (SSA_NAME_OCCURS_IN_ABNORMAL_PHI (gimple_phi_result (vphi)))
+	    SSA_NAME_OCCURS_IN_ABNORMAL_PHI (last_vdef) = 1;
 	  gsi = gsi_for_stmt (vphi); 
 	  remove_phi_node (&gsi, true);
 	}
@@ -2691,6 +2693,8 @@ combine_blocks (struct loop *loop)
 	      FOR_EACH_IMM_USE_ON_STMT (use_p, iter)
 		SET_USE (use_p, last_vdef);
 	    }
+	  if (SSA_NAME_OCCURS_IN_ABNORMAL_PHI (gimple_phi_result (vphi)))
+	    SSA_NAME_OCCURS_IN_ABNORMAL_PHI (last_vdef) = 1;
 	  gimple_stmt_iterator gsi = gsi_for_stmt (vphi); 
 	  remove_phi_node (&gsi, true);
 	}