re PR rtl-optimization/59896 (Bootstrap: Thumb-1 LRA unable to generate reloads for jump_insn)

2014-01-21  Vladimir Makarov  <vmakarov@redhat.com>

	PR rtl-optimization/59896
	* lra-constraints.c (process_alt_operands): Check unused note for
	matched operands of insn with no output reloads.

2014-01-21  Vladimir Makarov  <vmakarov@redhat.com>

	PR rtl-optimization/59896
	* gcc.target/arm/pr59896.c: New.

From-SVN: r206908

gcc/ChangeLog

@@ -1,3 +1,9 @@
+2014-01-21  Vladimir Makarov  <vmakarov@redhat.com>
+
+	PR rtl-optimization/59896
+	* lra-constraints.c (process_alt_operands): Check unused note for
+	matched operands of insn with no output reloads.
+
 2014-01-21  Richard Sandiford  <rdsandiford@googlemail.com>
 
 	* config/mips/mips.c (mips_move_to_gpr_cost): Add M16_REGS case.

gcc/lra-constraints.c

@@ -2199,7 +2199,13 @@ process_alt_operands (int only_alternative)
 		  || (curr_static_id->operand[nop].type != OP_OUT
 		      && no_input_reloads_p && ! const_to_mem)
 		  || (this_alternative_matches >= 0
-		      && (no_input_reloads_p || no_output_reloads_p)))
+		      && (no_input_reloads_p
+			  || (no_output_reloads_p
+			      && (curr_static_id->operand
+				  [this_alternative_matches].type != OP_IN)
+			      && ! find_reg_note (curr_insn, REG_UNUSED,
+						  no_subreg_reg_operand
+						  [this_alternative_matches])))))
 		{
 		  if (lra_dump_file != NULL)
 		    fprintf

gcc/testsuite/ChangeLog

@@ -1,3 +1,8 @@
+2014-01-21  Vladimir Makarov  <vmakarov@redhat.com>
+
+	PR rtl-optimization/59896
+	* gcc.target/arm/pr59896.c: New.
+
 2014-01-21  Vladimir Makarov  <vmakarov@redhat.com>
 
 	PR rtl-optimization/59858
@@ -15,7 +20,7 @@
 2014-01-20  Dominique d'Humieres  <dominiq@lps.ens.fr>
 
 	* gfortran.dg/round_3.f08: Add more cases.
-	
+
 2014-01-20  Richard Sandiford  <rdsandiford@googlemail.com>
 
 	* lib/target-supports.exp (force_conventional_output_for): New