From: ian <ian@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Sat, 19 Feb 2011 04:36:33 +0000 (+0000)
Subject: Don't crash on out of range switch value.
X-Git-Tag: upstream/4.9.2~22688
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=dc7c37c744a3f82679d65401bc9c8e333f7d248d;p=platform%2Fupstream%2Flinaro-gcc.git

Don't crash on out of range switch value.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@170305 138bc75d-0d04-0410-961f-82ee72b054a4
---

diff --git a/gcc/go/gofrontend/statements.cc b/gcc/go/gofrontend/statements.cc
index bb5a6a0..99ed665 100644
--- a/gcc/go/gofrontend/statements.cc
+++ b/gcc/go/gofrontend/statements.cc
@@ -3212,7 +3212,12 @@ Case_clauses::Case_clause::get_constant_tree(Translate_context* context,
 	  mpz_t ival;
 	  mpz_init(ival);
 	  if (!(*p)->integer_constant_value(true, ival, &itype))
-	    gcc_unreachable();
+	    {
+	      // Something went wrong.  This can happen with a
+	      // negative constant and an unsigned switch value.
+	      gcc_assert(saw_errors());
+	      continue;
+	    }
 	  gcc_assert(itype != NULL);
 	  tree type_tree = itype->get_tree(context->gogo());
 	  tree val = Expression::integer_constant_tree(ival, type_tree);