From: Andrew MacLeod <amacleod@redhat.com>
Date: Tue, 1 Nov 2022 17:18:33 +0000 (-0400)
Subject: Make sure ssa-name is valid.
X-Git-Tag: basepoints/gcc-14~3610
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=82b0345f6137b112728590d7c010dcd2cef08514;p=thirdparty%2Fgcc.git

Make sure ssa-name is valid.

	PR tree-optimization/107497
	* tree-vrp.cc (remove_unreachable::remove_and_update_globals):
	Check that ssa-name still exists before accessing it.
---

diff --git a/gcc/tree-vrp.cc b/gcc/tree-vrp.cc
index f0e4d37bef09..39f7eb7a75ec 100644
--- a/gcc/tree-vrp.cc
+++ b/gcc/tree-vrp.cc
@@ -180,7 +180,7 @@ remove_unreachable::remove_and_update_globals (bool final_p)
   bitmap_copy (dce, all_exports);
   // Don't attempt to DCE parameters.
   EXECUTE_IF_SET_IN_BITMAP (all_exports, 0, i, bi)
-    if (SSA_NAME_IS_DEFAULT_DEF (ssa_name (i)))
+    if (!ssa_name (i) || SSA_NAME_IS_DEFAULT_DEF (ssa_name (i)))
       bitmap_clear_bit (dce, i);
   simple_dce_from_worklist (dce);