Get stack adjustment from push operand in pushsf splitter

pushsf for -m64/-mx32 looks like

(set (mem:SF (pre_modify:SI (reg/f:SI 7 sp)
			    (plus:SI (reg/f:SI 7 sp)
			    (const_int -8))))
     (reg:SF 22 xmm1 [orig:84 D.1790 ] [84]))

Stack adjustment is in push operand and it isn't stack register mode size
which may be 4 bytes for -mx32.  This patch gets stack adjustment from
push operand if code of push isn't PRE_DEC.

gcc/

	PR target/59929
	* config/i386/i386.md (pushsf splitter): Get stack adjustment
	from push operand if code of push isn't PRE_DEC.

gcc/testsuite/

	PR target/59929
	* gcc.target/i386/pr59929.c: New test.

From-SVN: r207023

gcc/ChangeLog

+2014-01-23  H.J. Lu  <hongjiu.lu@intel.com>
+
+	PR target/59929
+	* config/i386/i386.md (pushsf splitter): Get stack adjustment
+	from push operand if code of push isn't PRE_DEC.
+
 2014-01-23  Michael Meissner  <meissner@linux.vnet.ibm.com>
 
 	PR target/59909

gcc/config/i386/i386.md

@@ -2765,7 +2765,20 @@
   "reload_completed"
   [(set (reg:P SP_REG) (plus:P (reg:P SP_REG) (match_dup 2)))
    (set (mem:SF (reg:P SP_REG)) (match_dup 1))]
-  "operands[2] = GEN_INT (-<P:MODE_SIZE>);")
+{
+  rtx op = XEXP (operands[0], 0);
+  if (GET_CODE (op) == PRE_DEC)
+    {
+      gcc_assert (!TARGET_64BIT);
+      op = GEN_INT (-4);
+    }
+  else
+    {
+      op = XEXP (XEXP (op, 1), 1);
+      gcc_assert (CONST_INT_P (op));
+    }
+  operands[2] = op;
+})
 
 (define_split
   [(set (match_operand:SF 0 "push_operand")

gcc/testsuite/ChangeLog

+2014-01-23  H.J. Lu  <hongjiu.lu@intel.com>
+
+	PR target/59929
+	* gcc.target/i386/pr59929.c: New test.
+
 2014-01-23  Michael Meissner  <meissner@linux.vnet.ibm.com>
 
 	PR target/59909

gcc/testsuite/gcc.target/i386/pr59929.c

+/* { dg-do run } */
+/* { dg-options "-O0 -mno-accumulate-outgoing-args" } */
+/* { dg-options "-O0 -mno-accumulate-outgoing-args -mx32 -maddress-mode=short" { target x32 } } */
+
+void
+__attribute__ ((noinline))
+test (float x1, float x2, float x3, float x4, float x5, float x6,
+      float x7, float x8, float x9, float x10, float x11, float x12,
+      float x13, float x14, float x15, float x16)
+{
+  if (x1 != 91
+      || x2 != 92
+      || x3 != 93
+      || x4 != 94
+      || x5 != 95
+      || x6 != 96
+      || x7 != 97
+      || x8 != 98
+      || x9 != 99
+      || x10 != 100
+      || x11 != 101
+      || x12 != 102
+      || x13 != 103
+      || x14 != 104
+      || x15 != 105
+      || x16 != 106)
+    __builtin_abort ();
+}
+
+float x1, x2, x3, x4, x5, x6, x7, x8, x9, x10, x11, x12, x13,
+      x14, x15, x16;
+
+int
+main ()
+{
+  x1 = 91;
+  x2 = 92;
+  x3 = 93;
+  x4 = 94;
+  x5 = 95;
+  x6 = 96;
+  x7 = 97;
+  x8 = 98;
+  x9 = 99;
+  x10 = 100;
+  x11 = 101;
+  x12 = 102;
+  x13 = 103;
+  x14 = 104;
+  x15 = 105;
+  x16 = 106;
+  test (x1, x2, x3, x4, x5, x6, x7, x8, x9, x10, x11, x12, x13,
+	x14, x15, x16);
+  return 0;
+}