predicates.md (input_operand): Add comment.

	* config/sparc/predicates.md (input_operand): Add comment.  Return
	true for any memory operand when LRA is in progress.
	* config/sparc/sparc.c (sparc_expand_move): Minor formatting fix.

Co-Authored-By: Jeff Law <law@redhat.com>
Co-Authored-By: Vladimir Makarov <vmakarov@redhat.com>

From-SVN: r246989

gcc/ChangeLog

+2017-04-19  Eric Botcazou  <ebotcazou@adacore.com>
+            Vladimir Makarov  <vmakarov@redhat.com>
+
+	* config/sparc/predicates.md (input_operand): Add comment.  Return
+	true for any memory operand when LRA is in progress.
+	* config/sparc/sparc.c (sparc_expand_move): Minor formatting fix.
+
 2017-04-18  Jeff Law  <law@redhat.com>
 
 	PR target/74563

gcc/config/sparc/predicates.md

@@ -373,6 +373,7 @@
   if (TARGET_ARCH32 && mode == DImode && GET_CODE (op) == CONST_INT)
     return true;
 
+  /* Allow FP constants to be built in integer registers.  */
   if (mclass == MODE_FLOAT && GET_CODE (op) == CONST_DOUBLE)
     return true;
 
@@ -388,7 +389,14 @@
 
   /* Check for valid MEM forms.  */
   if (GET_CODE (op) == MEM)
-    return memory_address_p (mode, XEXP (op, 0));
+    {
+      /* Except when LRA is precisely working hard to make them valid
+	 and relying entirely on the constraints.  */
+      if (lra_in_progress)
+	return true;
+
+      return memory_address_p (mode, XEXP (op, 0));
+    }
 
   return false;
 })

gcc/config/sparc/sparc.c

@@ -1911,9 +1911,8 @@ sparc_expand_move (machine_mode mode, rtx *operands)
 	  /* We are able to build any SF constant in integer registers
 	     with at most 2 instructions.  */
 	  && (mode == SFmode
-	      /* And any DF constant in integer registers.  */
-	      || (mode == DFmode
-		  && ! can_create_pseudo_p ())))
+	      /* And any DF constant in integer registers if needed.  */
+	      || (mode == DFmode && !can_create_pseudo_p ())))
 	return false;
 
       operands[1] = force_const_mem (mode, operands[1]);

gcc/testsuite/ChangeLog

+2017-04-19  Eric Botcazou  <ebotcazou@adacore.com>
+            Jeff Law  <law@redhat.com>
+
+	* gcc.c-torture/compile/20170419-1.c: New test.
+
 2017-04-19  Tom de Vries  <tom@codesourcery.com>
 
 	PR testsuite/80221

gcc/testsuite/gcc.c-torture/compile/20170419-1.c

+extern int __fpclassifyd (double x);
+
+double fdim (double x, double y)
+{
+   int c = __fpclassifyd (x);
+   if (c == 0)
+     return (x);
+   if (__fpclassifyd (y) == 0)
+     return (y);
+   if (c == 1)
+     return (__builtin_huge_val ());
+   return x > y ? x - y : 0.0;
+}