1 files changed, 23 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.target/i386/pr36578-1.c b/gcc/testsuite/gcc.target/i386/pr36578-1.c
new file mode 100644
index 000000000..49999351f
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/pr36578-1.c
@@ -0,0 +1,23 @@
+/* Test for unsafe floating-point conversions.  PR 36578.  */
+/* { dg-do run } */
+/* { dg-options "-msse2 -mfpmath=sse" } */
+/* { dg-require-effective-target sse2 } */
+
+#include "sse2-check.h"
+
+extern void abort (void);
+extern void exit (int);
+extern int printf(const char *, ...);
+
+volatile double d1 = 1.0;
+volatile double d2 = 0x1.00001p-53;
+volatile double d3;
+
+static void
+sse2_test (void)
+{
+  d3 = (double)((long double)d1 + (long double)d2);
+  if (d3 != d1)
+    abort ();
+  exit (0);
+}