From 872cbb32e06acfc58d3ae000923272056994a699 Mon Sep 17 00:00:00 2001 From: Ian Lance Taylor Date: Tue, 22 Feb 2011 02:34:18 +0000 Subject: [PATCH] Test shift count for overflow. From-SVN: r170384 --- gcc/go/gofrontend/expressions.cc | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/gcc/go/gofrontend/expressions.cc b/gcc/go/gofrontend/expressions.cc index a073f9d..3d687a6 100644 --- a/gcc/go/gofrontend/expressions.cc +++ b/gcc/go/gofrontend/expressions.cc @@ -4434,7 +4434,7 @@ Binary_expression::eval_integer(Operator op, Type* left_type, mpz_t left_val, case OPERATOR_LSHIFT: { unsigned long shift = mpz_get_ui(right_val); - if (mpz_cmp_ui(right_val, shift) != 0) + if (mpz_cmp_ui(right_val, shift) != 0 || shift > 0x100000) { error_at(location, "shift count overflow"); mpz_set_ui(val, 0); -- 2.7.4