re PR target/65167 (ICE: in assign_by_spills, at lra-assigns.c:1383 (unable to…

re PR target/65167 (ICE: in assign_by_spills, at lra-assigns.c:1383 (unable to find a register to spill) with -O -fschedule-insns -fcheck-pointer-bounds -mmpx)

gcc/

	PR target/65167
	* gcc/config/i386/i386.c (ix86_function_arg_regno_p): Support
	bounds registers.
	(avoid_func_arg_motion): Add dependencies for BNDSTX insns.

gcc/testsuite/

	PR target/65167
	* gcc.target/i386/pr65167.c: New.

From-SVN: r220970

gcc/ChangeLog

+2015-02-25  Ilya Enkovich  <ilya.enkovich@intel.com>
+
+	PR target/65167
+	* gcc/config/i386/i386.c (ix86_function_arg_regno_p): Support
+	bounds registers.
+	(avoid_func_arg_motion): Add dependencies for BNDSTX insns.
+
 2015-02-25  Alan Lawrence  <alan.lawrence@arm.com>
 
 	PR target/64997

gcc/config/i386/i386.c

@@ -6120,6 +6120,9 @@ ix86_function_arg_regno_p (int regno)
   int i;
   const int *parm_regs;
 
+  if (TARGET_MPX && BND_REGNO_P (regno))
+    return true;
+
   if (!TARGET_64BIT)
     {
       if (TARGET_MACHO)
@@ -26898,6 +26901,16 @@ avoid_func_arg_motion (rtx_insn *first_arg, rtx_insn *insn)
   rtx set;
   rtx tmp;
 
+  /* Add anti dependencies for bounds stores.  */
+  if (INSN_P (insn)
+      && GET_CODE (PATTERN (insn)) == PARALLEL
+      && GET_CODE (XVECEXP (PATTERN (insn), 0, 0)) == UNSPEC
+      && XINT (XVECEXP (PATTERN (insn), 0, 0), 1) == UNSPEC_BNDSTX)
+    {
+      add_dependence (first_arg, insn, REG_DEP_ANTI);
+      return;
+    }
+
   set = single_set (insn);
   if (!set)
     return;

gcc/testsuite/ChangeLog

+2015-02-25  Ilya Enkovich  <ilya.enkovich@intel.com>
+
+	PR target/65167
+	* gcc.target/i386/pr65167.c: New.
+
 2015-02-25  Kai Tietz  <ktietz@redhat.com>
 
 	PR tree-optimization/61917

gcc/testsuite/gcc.target/i386/pr65167.c

+/* { dg-do compile } */
+/* { dg-require-effective-target mpx } */
+/* { dg-options "-O -fschedule-insns -fcheck-pointer-bounds -mmpx" } */
+
+void bar(int *a, int *b, int *c, int *d, int *e, int *f);
+
+int foo (int *a, int *b, int *c, int *d, int *e, int *f)
+{
+  bar (a, b, c, d, e, f);
+  return *f;
+}