rs6000.c (is_complex_IBM_long_double): Explicitly check for 128-bit long double…

rs6000.c (is_complex_IBM_long_double): Explicitly check for 128-bit long double before checking TCmode.

2018-01-10  Michael Meissner  <meissner@linux.vnet.ibm.com>

	* config/rs6000/rs6000.c (is_complex_IBM_long_double): Explicitly
	check for 128-bit long double before checking TCmode.
	* config/rs6000/rs6000.h (FLOAT128_IEEE_P): Explicitly check for
	128-bit long doubles before checking TFmode or TCmode.
	(FLOAT128_IBM_P): Likewise.

From-SVN: r256458

gcc/ChangeLog

+2018-01-10  Michael Meissner  <meissner@linux.vnet.ibm.com>
+
+	* config/rs6000/rs6000.c (is_complex_IBM_long_double): Explicitly
+	check for 128-bit long double before checking TCmode.
+	* config/rs6000/rs6000.h (FLOAT128_IEEE_P): Explicitly check for
+	128-bit long doubles before checking TFmode or TCmode.
+	(FLOAT128_IBM_P): Likewise.
+
 2018-01-10  Martin Sebor  <msebor@redhat.com>
 
 	PR tree-optimization/83671

gcc/config/rs6000/rs6000.c

@@ -11429,7 +11429,7 @@ rs6000_must_pass_in_stack (machine_mode mode, const_tree type)
 static inline bool
 is_complex_IBM_long_double (machine_mode mode)
 {
-  return mode == ICmode || (!TARGET_IEEEQUAD && mode == TCmode);
+  return mode == ICmode || (mode == TCmode && FLOAT128_IBM_P (TCmode));
 }
 
 /* Whether ABI_V4 passes MODE args to a function in floating point

gcc/config/rs6000/rs6000.h

@@ -437,11 +437,13 @@ extern const char *host_detect_local_cpu (int argc, const char **argv);
    Similarly IFmode is the IBM long double format even if the default is IEEE
    128-bit.  Don't allow IFmode if -msoft-float.  */
 #define FLOAT128_IEEE_P(MODE)						\
-  ((TARGET_IEEEQUAD && ((MODE) == TFmode || (MODE) == TCmode))		\
+  ((TARGET_IEEEQUAD && TARGET_LONG_DOUBLE_128				\
+    && ((MODE) == TFmode || (MODE) == TCmode))				\
    || ((MODE) == KFmode) || ((MODE) == KCmode))
 
 #define FLOAT128_IBM_P(MODE)						\
-  ((!TARGET_IEEEQUAD && ((MODE) == TFmode || (MODE) == TCmode))		\
+  ((!TARGET_IEEEQUAD && TARGET_LONG_DOUBLE_128				\
+    && ((MODE) == TFmode || (MODE) == TCmode))				\
    || (TARGET_HARD_FLOAT && ((MODE) == IFmode || (MODE) == ICmode)))
 
 /* Helper macros to say whether a 128-bit floating point type can go in a