re PR rtl-optimization/59959 (LRA ICEs on a fortran case(Suspected to be similar to pr59915))

2014-01-30  Vladimir Makarov  <vmakarov@redhat.com>

	PR rtl-optimization/59959
	* lra-constrains.c (simplify_operand_subreg): Assign NO_REGS to
	any reload of register whose subreg is invalid.

From-SVN: r207323

gcc/ChangeLog

+2014-01-30  Vladimir Makarov  <vmakarov@redhat.com>
+
+	PR rtl-optimization/59959
+	* lra-constrains.c (simplify_operand_subreg): Assign NO_REGS to
+	any reload of register whose subreg is invalid.
+
 2014-01-30  Jakub Jelinek  <jakub@redhat.com>
 
 	* config/i386/f16cintrin.h (_cvtsh_ss): Avoid -Wnarrowing

gcc/lra-constraints.c

@@ -1293,11 +1293,8 @@ simplify_operand_subreg (int nop, enum machine_mode reg_mode)
     {
       enum reg_class rclass;
 
-      if (REG_P (reg)
-	  && curr_insn_set != NULL_RTX
-	  && (REG_P (SET_SRC (curr_insn_set))
-	      || GET_CODE (SET_SRC (curr_insn_set)) == SUBREG))
-	/* There is big probability that we will get the same class
+      if (REG_P (reg))
+	/* There is a big probability that we will get the same class
 	   for the new pseudo and we will get the same insn which
 	   means infinite looping.  So spill the new pseudo.  */
 	rclass = NO_REGS;