rs6000.md (extendtfif2): Add missing 128-bit conversion insn that shows up when...

2018-06-21  Michael Meissner  <meissner@linux.ibm.com>

	* config/rs6000/rs6000.md (extendtfif2): Add missing 128-bit
	conversion insn that shows up when pr85657-3.c is compiled using
	IEEE 128-bit long double.

From-SVN: r261867

gcc/ChangeLog

+2018-06-21  Michael Meissner  <meissner@linux.ibm.com>
+
+	* config/rs6000/rs6000.md (extendtfif2): Add missing 128-bit
+	conversion insn that shows up when pr85657-3.c is compiled using
+	IEEE 128-bit long double.
+
 2018-06-21  Eric Botcazou  <ebotcazou@adacore.com>
 
 	* cfgrtl.c (fixup_reorder_chain): Do not emit NOPs in DECL_IGNORED_P

gcc/config/rs6000/rs6000.md

@@ -8158,6 +8158,15 @@
   DONE;
 })
 
+(define_expand "extendtfif2"
+  [(set (match_operand:IF 0 "gpc_reg_operand")
+	(float_extend:IF (match_operand:TF 1 "gpc_reg_operand")))]
+  "TARGET_FLOAT128_TYPE"
+{
+  rs6000_expand_float128_convert (operands[0], operands[1], false);
+  DONE;
+})
+
 (define_expand "trunciftf2"
   [(set (match_operand:TF 0 "gpc_reg_operand")
 	(float_truncate:TF (match_operand:IF 1 "gpc_reg_operand")))]