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				// Copyright (c) 2019 The Bitcoin Core developers
				// Distributed under the MIT software license, see the accompanying
				// file COPYING or http://www.opensource.org/licenses/mit-license.php.

				#include <boost/test/unit_test.hpp>
				#include <test/util/setup_common.h>

				BOOST_FIXTURE_TEST_SUITE(compilerbug_tests, BasicTestingSetup)

				#if defined(__GNUC__)
				// This block will also be built under clang, which is fine (as it supports
				// noinline)
				void __attribute__((noinline)) set_one(uint8_t *ptr) {
				*ptr = 1;
				}

				int __attribute__((noinline)) check_zero(uint8_t const *in, unsigned int len) {
				for (unsigned int i = 0; i < len; ++i) {
				if (in[i] != 0) {
				return 0;
				}
				}
				return 1;
				}

				void set_one_on_stack() {
				uint8_t buf[1];
				set_one(buf);
				}

				BOOST_AUTO_TEST_CASE(gccbug_90348) {
				// Test for GCC bug 90348. See
				// https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90348
				for (int i = 0; i <= 4; ++i) {
				uint8_t in[4];
				for (int j = 0; j < i; ++j) {
				in[j] = 0;
				set_one_on_stack(); // Apparently modifies in[0]
				}
				BOOST_CHECK(check_zero(in, i));
				}
				}
				#endif

				BOOST_AUTO_TEST_SUITE_END()