[PATCH] Avoid going to GENERIC for TER expansion

[Richard Biener]

$subject - we have the sepops interface for this.

Bootstrapped on x86_64-unknown-linux-gnu, testing in progress.

Richard.

2014-04-23  Richard Biener  <rguent...@suse.de>

        * expr.c (expand_expr_real_1): Avoid gimple_assign_rhs_to_tree
        during TER and instead use the sepops interface for expanding
        non-GIMPLE_SINGLE_RHS.

Index: gcc/expr.c
===================================================================
*** gcc/expr.c  (revision 209559)
--- gcc/expr.c  (working copy)
*************** expand_expr_real_1 (tree exp, rtx target
*** 9395,9406 ****
        if (g)
        {
          rtx r;
!         location_t saved_loc = curr_insn_location ();
! 
!         set_curr_insn_location (gimple_location (g));
!         r = expand_expr_real (gimple_assign_rhs_to_tree (g), target,
!                               tmode, modifier, NULL, inner_reference_p);
!         set_curr_insn_location (saved_loc);
          if (REG_P (r) && !REG_EXPR (r))
            set_reg_attrs_for_decl_rtl (SSA_NAME_VAR (exp), r);
          return r;
--- 9395,9427 ----
        if (g)
        {
          rtx r;
!         ops.code = gimple_assign_rhs_code (g);
!           switch (get_gimple_rhs_class (ops.code))
!           {
!           case GIMPLE_TERNARY_RHS:
!             ops.op2 = gimple_assign_rhs3 (g);
!             /* Fallthru */
!           case GIMPLE_BINARY_RHS:
!             ops.op1 = gimple_assign_rhs2 (g);
!             /* Fallthru */
!           case GIMPLE_UNARY_RHS:
!             ops.op0 = gimple_assign_rhs1 (g);
!             ops.type = TREE_TYPE (gimple_assign_lhs (g));
!             ops.location = gimple_location (g);
!             r = expand_expr_real_2 (&ops, target, tmode, modifier);
!             break;
!           case GIMPLE_SINGLE_RHS:
!             {
!               location_t saved_loc = curr_insn_location ();
!               set_curr_insn_location (gimple_location (g));
!               r = expand_expr_real (gimple_assign_rhs1 (g), target,
!                                     tmode, modifier, NULL, inner_reference_p);
!               set_curr_insn_location (saved_loc);
!               break;
!             }
!           default:
!             gcc_unreachable ();
!           }
          if (REG_P (r) && !REG_EXPR (r))
            set_reg_attrs_for_decl_rtl (SSA_NAME_VAR (exp), r);
          return r;