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libstdc++: Add testcase for bogus -Wstringop-overflow in std::vector [PR117983]

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This was fixed on trunk by r15-4473-g3abe751ea86e34, just add the
testcase.

libstdc++-v3/ChangeLog:

	PR libstdc++/117983
	* testsuite/23_containers/vector/modifiers/insert/117983.cc: New
	test.
This commit is contained in:
Jonathan Wakely 2025-03-28 21:46:46 +00:00 • committed by Jonathan Wakely
parent fb132276d1
commit 878812b6f6
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libstdc++-v3/testsuite/23_containers/vector/modifiers/insert/117983.cc Normal file
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// { dg-options "-O3 -Werror=stringop-overflow" }
// { dg-do compile }
// PR libstdc++/117983
// -Wstringop-overflow false positive for __builtin_memmove from vector::insert
#include <vector>
typedef std::vector<unsigned char> bytes;
void push(bytes chunk, bytes& data) {
if (data.empty()) {
data.swap(chunk);
} else {
data.insert(data.end(), chunk.begin(), chunk.end());
}
}