Test shift count for overflow.

From-SVN: r170384

Test shift count for overflow.
From-SVN: r170384
872cbb32 · Ian Lance Taylor · 7de97f9e · 872cbb32
Commit 872cbb32 authored Feb 22, 2011 by Ian Lance Taylor
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gcc/go/gofrontend/expressions.cc
+1 -1

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--- 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);