Fix MIPS o32 calling convention for MSA and FP vector types

gcc/
	* config/mips/mips.c (mips_return_in_memory): Force FP
	vector types to be returned in memory for o32 ABI.

gcc/testsuite/

	* gcc.target/mips/msa-fp-cc.c: New test.

From-SVN: r245666

gcc/ChangeLog

+2017-02-22  Sameera Deshpande  <sameera.deshpande@imgtec.com>
+
+	* config/mips/mips.c (mips_return_in_memory): Force FP
+	vector types to be returned in memory for o32 ABI.
+
 2017-02-22  Jakub Jelinek  <jakub@redhat.com>
 
 	* dwarf2out.c (gen_variable_die): For -gdwarf-5, use DW_TAG_variable

gcc/config/mips/mips.c

@@ -6472,9 +6472,13 @@ mips_function_value_regno_p (const unsigned int regno)
 static bool
 mips_return_in_memory (const_tree type, const_tree fndecl ATTRIBUTE_UNUSED)
 {
-  return (TARGET_OLDABI
-	  ? TYPE_MODE (type) == BLKmode
-	  : !IN_RANGE (int_size_in_bytes (type), 0, 2 * UNITS_PER_WORD));
+  if (TARGET_OLDABI)
+    /* Ensure that any floating point vector types are returned via memory
+       even if they are supported through a vector mode with some ASEs.  */
+    return (VECTOR_FLOAT_TYPE_P (type)
+	    || TYPE_MODE (type) == BLKmode);
+
+  return (!IN_RANGE (int_size_in_bytes (type), 0, 2 * UNITS_PER_WORD));
 }
 
 /* Implement TARGET_SETUP_INCOMING_VARARGS.  */

gcc/testsuite/ChangeLog

+2017-02-22  Sameera Deshpande  <sameera.deshpande@imgtec.com>
+
+	* gcc.target/mips/msa-fp-cc.c: New test.
+
 2017-02-22  Jakub Jelinek  <jakub@redhat.com>
 
 	PR c++/79664

gcc/testsuite/gcc.target/mips/msa-fp-cc.c

+/* { dg-do compile } */
+/* { dg-options "-mabi=32 -mfp64 -mhard-float -mmsa" } */
+typedef float v4f32 __attribute__((vector_size(16)));
+typedef double v2f64 __attribute__((vector_size(16)));
+
+v4f32
+fcmpOeqVector4 (v4f32 a, v4f32 b)
+{
+  return a + b;
+}
+
+v2f64
+fcmpOeqVector2 (v2f64 a, v2f64 b)
+{
+  return a + b;
+}
+
+/* { dg-final { scan-assembler-not "copy_s" } } */
+/* { dg-final { scan-assembler-not "insert" } } */