[PATCH] Beautify reg_stack.c/get_true_reg a tiny bit

[Uros Bizjak]

2018-09-06  Uros Bizjak  <ubiz...@gmail.com>

    * reg-stack.c (get_true_reg) <case FLOAT_TRUNCATE>: Reorder
    to fallthru to FLOAT case.

Bootstrapped and regression tested on x86_64-linux-gnu {,-m32}.

Committed to mainline SVN.

Uros.

diff --git a/gcc/reg-stack.c b/gcc/reg-stack.c
index 519ea6df75c..0f1b6d52f01 100644
--- a/gcc/reg-stack.c
+++ b/gcc/reg-stack.c
@@ -413,8 +413,9 @@ get_true_reg (rtx *pat)
        /* Eliminate FP subregister accesses in favor of the
           actual FP register in use.  */
        {
-         rtx subreg;
-         if (STACK_REG_P (subreg = SUBREG_REG (*pat)))
+         rtx subreg = SUBREG_REG (*pat);
+
+         if (STACK_REG_P (subreg))
            {
              int regno_off = subreg_regno_offset (REGNO (subreg),
                                                   GET_MODE (subreg),
@@ -427,6 +428,12 @@ get_true_reg (rtx *pat)
          pat = &XEXP (*pat, 0);
          break;
        }
+
+      case FLOAT_TRUNCATE:
+       if (!flag_unsafe_math_optimizations)
+         return pat;
+       /* FALLTHRU */
+
       case FLOAT:
       case FIX:
       case FLOAT_EXTEND:
@@ -439,12 +446,6 @@ get_true_reg (rtx *pat)
          pat = &XVECEXP (*pat, 0, 0);
        return pat;
 
-      case FLOAT_TRUNCATE:
-       if (!flag_unsafe_math_optimizations)
-         return pat;
-       pat = &XEXP (*pat, 0);
-       break;
-
       default:
        return pat;
       }