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Test shift count for overflow.

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From-SVN: r170384
This commit is contained in:
Ian Lance Taylor 2011-02-22 02:34:18 +00:00
parent 7de97f9e1a
commit 872cbb32e0
1 changed files with 1 additions and 1 deletions
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2
gcc/go/gofrontend/expressions.cc
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@ -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);