reg-stack.c (subst_stack_regs_pat): Abort if the destination of a FP conditional...

        * reg-stack.c (subst_stack_regs_pat): Abort if the destination
        of a FP conditional move is not on the FP register stack.
Forgot to check it in last night/this morning.  One should not hack at 4am.

From-SVN: r24716

diff --git a/gcc/reg-stack.c b/gcc/reg-stack.c
index e3917063bebce5400d82a0bb6eb1fd24b49fc1a4..a0f48fa1e56234699ce6c3e314b6cdde31277c33 100644 (file)
--- a/gcc/reg-stack.c
+++ b/gcc/reg-stack.c
@@ -1,5 +1,5 @@
 /* Register to Stack convert for GNU compiler.
-   Copyright (C) 1992, 93, 94, 95, 96, 97, 1998 Free Software Foundation, Inc.
+   Copyright (C) 1992, 93-98, 1999 Free Software Foundation, Inc.
 
 This file is part of GNU CC.
 
@@ -2046,6 +2046,10 @@ subst_stack_regs_pat (insn, regstack, pat)
        break;
 
       case IF_THEN_ELSE:
+       /* dest has to be on stack. */
+       if (get_hard_regnum (regstack, *dest) < FIRST_STACK_REG)
+         abort ();
+
        /* This insn requires the top of stack to be the destination. */
 
        /* If the comparison operator is an FP comparison operator,
@@ -2099,9 +2103,7 @@ subst_stack_regs_pat (insn, regstack, pat)
              }
        }
 
-       /* Make dest the top of stack.  Add dest to regstack if not present. */
-       if (get_hard_regnum (regstack, *dest) < FIRST_STACK_REG)
-         regstack->reg[++regstack->top] = REGNO (*dest);       
+       /* Make dest the top of stack. */
        SET_HARD_REG_BIT (regstack->reg_set, REGNO (*dest));
        replace_reg (dest, FIRST_STACK_REG);