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authorchriseth <chris@ethereum.org>2016-09-17 18:30:41 +0800
committerGitHub <noreply@github.com>2016-09-17 18:30:41 +0800
commit212e01609144ebd82bd6a4884b924fc97f31a1b4 (patch)
treecb2373739001771bd7dbd32fa325285cdcd3b4a0 /test/libsolidity
parent60f432e869c3d49a0a68f707b9377335e7427159 (diff)
parenta4f6e5b16c7b9a9ba94c63b6042c20a988219e8e (diff)
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Merge pull request #1104 from ethereum/fixmemcosts
Fix memory resize costs during call
Diffstat (limited to 'test/libsolidity')
-rw-r--r--test/libsolidity/SolidityEndToEndTest.cpp27
1 files changed, 27 insertions, 0 deletions
diff --git a/test/libsolidity/SolidityEndToEndTest.cpp b/test/libsolidity/SolidityEndToEndTest.cpp
index 3c949e9a..23bd2abc 100644
--- a/test/libsolidity/SolidityEndToEndTest.cpp
+++ b/test/libsolidity/SolidityEndToEndTest.cpp
@@ -7203,6 +7203,33 @@ BOOST_AUTO_TEST_CASE(no_nonpayable_circumvention_by_modifier)
BOOST_CHECK_EQUAL(balanceAt(m_contractAddress), 0);
}
+BOOST_AUTO_TEST_CASE(mem_resize_is_not_paid_at_call)
+{
+ // This tests that memory resize for return values is not paid during the call, which would
+ // make the gas calculation overly complex. We access the end of the output area before
+ // the call is made.
+ // Tests that this also survives the optimizer.
+ char const* sourceCode = R"(
+ contract C {
+ function f() returns (uint[200]) {}
+ }
+ contract D {
+ function f(C c) returns (uint) { c.f(); return 7; }
+ }
+ )";
+
+ compileAndRun(sourceCode, 0, "C");
+ u160 cAddr = m_contractAddress;
+ compileAndRun(sourceCode, 0, "D");
+ BOOST_CHECK(callContractFunction("f(address)", cAddr) == encodeArgs(u256(7)));
+
+ m_optimize = true;
+
+ compileAndRun(sourceCode, 0, "C");
+ u160 cAddrOpt = m_contractAddress;
+ compileAndRun(sourceCode, 0, "D");
+ BOOST_CHECK(callContractFunction("f(address)", cAddrOpt) == encodeArgs(u256(7)));
+}
BOOST_AUTO_TEST_SUITE_END()