[libc++] Add tests for gcd that result in something other than zero or one

[hiraditya]

@colincross identified gcd does not have a single case whose answer is not 0, 1, or the smaller of the two inputs.

[llvmbot]

@llvm/pr-subscribers-libcxx

Author: AdityaK (hiraditya)

Changes

@colincross identified gcd does not have a single case whose answer is not 0, 1, or the smaller of the two inputs.

---

Full diff: https://github.com/llvm/llvm-project/pull/129395.diff

1 Files Affected:

• (modified) libcxx/test/std/numerics/numeric.ops/numeric.ops.gcd/gcd.pass.cpp (+1-1)

diff --git a/libcxx/test/std/numerics/numeric.ops/numeric.ops.gcd/gcd.pass.cpp b/libcxx/test/std/numerics/numeric.ops/numeric.ops.gcd/gcd.pass.cpp
index 975b53a763afa..c5d3c127fc1ec 100644
--- a/libcxx/test/std/numerics/numeric.ops/numeric.ops.gcd/gcd.pass.cpp
+++ b/libcxx/test/std/numerics/numeric.ops/numeric.ops.gcd/gcd.pass.cpp
@@ -27,7 +27,7 @@ constexpr struct {
   int x;
   int y;
   int expect;
-} Cases[] = {{0, 0, 0}, {1, 0, 1}, {0, 1, 1}, {1, 1, 1}, {2, 3, 1}, {2, 4, 2}, {11, 9, 1}, {36, 17, 1}, {36, 18, 18}};
+} Cases[] = {{0, 0, 0}, {1, 0, 1}, {0, 1, 1}, {1, 1, 1}, {2, 3, 1}, {2, 4, 2}, {11, 9, 1}, {36, 17, 1}, {36, 18, 18}, {25, 30, 5}, {24, 16, 8}, {256, 100, 4}};
 
 template <typename Input1, typename Input2, typename Output>
 constexpr bool test0(int in1, int in2, int out)

[github-actions]

✅ With the latest revision this PR passed the C/C++ code formatter.

[serge-sans-paille]

do_fuzzy_tests<...>() does do more than what's mentioned in the commit message but I'm all in for extra deterministic values.

The freebsd errors seem unrelated (thread_create_failure.pass.cpp?)