1 files changed, 20 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/dfp/float-constant-double.c b/gcc/testsuite/gcc.dg/dfp/float-constant-double.c
new file mode 100644
index 000000000..52c5d7126
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/dfp/float-constant-double.c
@@ -0,0 +1,20 @@
+/* { dg-do compile } */
+
+/* Constant float values of type double in <float.h> are suffixed with L
+   and cast to double so they can be used within code that uses pragma
+   FLOAT_CONST_DECIMAL64.  If they were not suffixed then use of the macro
+   would have them interpreted as _Decimal64, leading to errors when used
+   in expressions with other operands of type double.  */
+
+#include <float.h>
+
+extern double a, b, c, d;
+
+void
+foo ()
+{
+  _Pragma ("STDC FLOAT_CONST_DECIMAL64 ON")
+  a = 0.1d * DBL_MAX;
+  b = DBL_EPSILON * 10.0d;
+  c = DBL_MIN * 200.0d;
+}