re PR target/39027 (double floating point suffix of 'd' and 'D' not accepted)

gcc/
	PR c/29027
	* c-lex.c (interpret_float): Default (no suffix) is double.

libcpp/
	PR c/29027
	* include/cpplib.h (CPP_N_DEFAULT): Define.
	* expr.c (interpret_float_suffix): Recognize d or D for double,
	return new value for default.
	(cpp_classify_number): Issue pedwarn for use of d or D in suffix.

gcc/testsuite/
	PR c/29027
	* gcc.dg/fltconst-1.c: Don't error for use of d or D in suffix.
	* gcc.dg/fltconst-2.c: New test.
	* gcc.dg/fltconst-double-pedantic-1.c: New test.
	* gcc.dg/fltconst-double-pedantic-2.c: New test.

From-SVN: r145422

1 files changed, 40 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.dg/fltconst-2.c b/gcc/testsuite/gcc.dg/fltconst-2.c
new file mode 100644
index 0000000..d4d06ac
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/fltconst-2.c
@@ -0,0 +1,40 @@
+/* { dg-do compile } */
+/* { dg-options "-std=gnu99" } */
+
+/* Check that d or D is recognized as a float constant suffix.  */
+
+double d = 0.5d;
+double D = 0.5D;
+
+/* Check that d or D is recognized in a hexadecimal floating constant.  */
+
+double hd1 = 0x1.8p1d;
+double hd2 = 0x1.p+1D;
+double hd3 = 0x0.8p-1d;
+
+/* Check that imaginary constant suffixes are still recognized with
+   only i, I, j, or J.  */
+
+double i = 0.5i;
+double I = 0.5I;
+double j = 0.5j;
+double J = 0.5J;
+
+/* Check that imaginary constant suffixes are allowed with d or D.  */
+
+double di = 0.5di;
+double dI = 0.5dI;
+double Di = 0.5Di;
+double DI = 0.5DI;
+double dj = 0.5dj;
+double dJ = 0.5dJ;
+double Dj = 0.5Dj;
+double DJ = 0.5DJ;
+double id = 0.5id;
+double iD = 0.5iD;
+double Id = 0.5Id;
+double ID = 0.5ID;
+double jd = 0.5jd;
+double jD = 0.5jD;
+double Jd = 0.5Jd;
+double JD = 0.5JD;