Go patch committed: Use correct check for index value overflow

[Ian Lance Taylor]

This patch to the Go frontend uses the correct size and comparison
when doing an index value overflow check.  This has apparently been
wrong since I introduced the code ten years ago.  This fixes GCC PR
114500.  Bootstrapped and ran Go testsuite on x86_64-pc-linux-gnu.
Committed to mainline.

Ian

1091113a0036c7315197e09af572dce2beaf1c4c
diff --git a/gcc/go/gofrontend/MERGE b/gcc/go/gofrontend/MERGE
index de6e21fb3b5..50d430d5034 100644
--- a/gcc/go/gofrontend/MERGE
+++ b/gcc/go/gofrontend/MERGE
@@ -1,4 +1,4 @@
-3f597287b6b858794dabdfe1bf83b386aad18102
+98e92493db2ab7857a5934a950a830fc1f95a4e5
 
 The first line of this file holds the git revision number of the last
 merge done from the gofrontend repository.
diff --git a/gcc/go/gofrontend/expressions.cc b/gcc/go/gofrontend/expressions.cc
index 8429e553eac..238d5a56ca2 100644
--- a/gcc/go/gofrontend/expressions.cc
+++ b/gcc/go/gofrontend/expressions.cc
@@ -18790,7 +18790,7 @@ Composite_literal_expression::lower_array(Type* type)
 
          Named_type* ntype = Type::lookup_integer_type("int");
          Integer_type* inttype = ntype->integer_type();
-         if (sizeof(index) <= static_cast<size_t>(inttype->bits() * 8)
+         if (sizeof(index) >= static_cast<size_t>(inttype->bits() / 8)
              && index >> (inttype->bits() - 1) != 0)
            {
              go_error_at(index_expr->location(), "index value overflow");