expm1 tests: Avoid test failure on 32-bit mingw.

* tests/test-expm1.h (test_function): Mark y as 'volatile'.

2 files changed, 6 insertions, 5 deletions

diff --git a/ChangeLog b/ChangeLog
index 1a980889b9..0884a04d7c 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,10 @@
 2023-04-25  Bruno Haible  <bruno@clisp.org>
 
+	expm1 tests: Avoid test failure on 32-bit mingw.
+	* tests/test-expm1.h (test_function): Mark y as 'volatile'.
+
+2023-04-25  Bruno Haible  <bruno@clisp.org>
+
 	poll tests: Avoid test failure on native Windows.
 	* tests/test-poll.c (test_pipe): Disable the POLLHUP check also on
 	native Windows.
diff --git a/tests/test-expm1.h b/tests/test-expm1.h
index 8d2a9b9398..68f3f6be6f 100644
--- a/tests/test-expm1.h
+++ b/tests/test-expm1.h
@@ -35,14 +35,10 @@ test_function (void)
 
     for (i = -1, x = L_(0.5); i >= MIN_EXP; i--, x *= L_(0.5))
       {
-        DOUBLE y;
+        volatile DOUBLE y;
 
         y = EXPM1 (x);
-#ifdef __MINGW32__ /* mingw returns a value that is slightly too small.  */
-        ASSERT (y >= x * (L_(1.0) - L_(1.0) / TWO_MANT_DIG));
-#else
         ASSERT (y >= x);
-#endif
         ASSERT (y < L_(1.5) * x);
 
         y = EXPM1 (- x);