(mark_used_regs, case SUBREG): Only fall through to REG case

if operand is a REG. From-SVN: r9247

(mark_used_regs, case SUBREG): Only fall through to REG case
if operand is a REG. From-SVN: r9247
ce79abf3 · Jim Wilson · b88277f9 · ce79abf3
Commit ce79abf3 authored Mar 29, 1995 by Jim Wilson
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gcc/flow.c
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--- a/gcc/flow.c
+++ b/gcc/flow.c
@@ -2385,6 +2385,11 @@ mark_used_regs (needed, live, x, final, insn)
      /* While we're here, optimize this case.  */
      x = SUBREG_REG (x);

+      /* Must verify that it is a register, since the RS/6000 port has
+	 (subreg:QI (lshift:SI ...)).  */
+      if (GET_CODE (x) != REG)
+	goto retry;
+
      /* ... fall through ... */

    case REG: