(basic_induction_var): Return 0 if SUBREG is not a promoted variable.

From-SVN: r13365

(basic_induction_var): Return 0 if SUBREG is not a promoted variable.
From-SVN: r13365
fe159061 · Richard Kenner · c2ae5b5f · fe159061
Commit fe159061 authored Jan 04, 1997 by Richard Kenner
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gcc/loop.c
+2 -1

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--- a/gcc/loop.c
+++ b/gcc/loop.c
 /* Perform various loop optimizations, including strength reduction.
-   Copyright (C) 1987, 88, 89, 91-5, 1996 Free Software Foundation, Inc.
+   Copyright (C) 1987, 88, 89, 91-6, 1997 Free Software Foundation, Inc.

 This file is part of GNU CC.

@@ -4989,6 +4989,7 @@ basic_induction_var (x, mode, dest_reg, p, inc_val, mult_val)
      if (SUBREG_PROMOTED_VAR_P (x))
 	return basic_induction_var (SUBREG_REG (x), GET_MODE (SUBREG_REG (x)),
 				    dest_reg, p, inc_val, mult_val);
+      return 0;

    case REG:
      /* If this register is assigned in the previous insn, look at its