From: Eric Botcazou <ebotcazou@adacore.com>
Date: Wed, 19 Apr 2017 08:05:36 +0000 (+0000)
Subject: predicates.md (input_operand): Add comment.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=a16c8d8b61064dfd2281dd1749b65d633b256334;p=gcc.git

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
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 7aa8c03c45b..d52db8a3609 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,10 @@
+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
diff --git a/gcc/config/sparc/predicates.md b/gcc/config/sparc/predicates.md
index 118ed916ad9..951933efb39 100644
--- a/gcc/config/sparc/predicates.md
+++ b/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;
 })
diff --git a/gcc/config/sparc/sparc.c b/gcc/config/sparc/sparc.c
index 16ca444518f..8277496964a 100644
--- a/gcc/config/sparc/sparc.c
+++ b/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]);
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 90fdddb5f91..8f2cfffd999 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+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
diff --git a/gcc/testsuite/gcc.c-torture/compile/20170419-1.c b/gcc/testsuite/gcc.c-torture/compile/20170419-1.c
new file mode 100644
index 00000000000..c16a5ea2af4
--- /dev/null
+++ b/gcc/testsuite/gcc.c-torture/compile/20170419-1.c
@@ -0,0 +1,13 @@
+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;
+}