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(pushcase_range): Check for null range first. 

From-SVN: r13977
This commit is contained in:
Richard Kenner 1997-04-24 16:39:21 -04:00
parent 469b759e8c
commit 1974bfb11f
1 changed files with 7 additions and 7 deletions
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14
gcc/stmt.c
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@ -1,5 +1,5 @@
/* Expands front end tree to back end RTL for GNU C-Compiler
Copyright (C) 1987, 88, 89, 92-5, 1996 Free Software Foundation, Inc.
Copyright (C) 1987, 88, 89, 92-6, 1997 Free Software Foundation, Inc.
This file is part of GNU CC.
@ -4410,6 +4410,10 @@ pushcase (value, converter, label, duplicate)
if (! (case_stack && case_stack->data.case_stmt.start))
return 1;
/* Fail if the range is empty. */
if (tree_int_cst_lt (value2, value1))
return 4;
if (stack_block_stack
&& stack_block_stack->depth > case_stack->depth)
return 5;
@ -4524,11 +4528,11 @@ pushcase_range (value1, value2, converter, label, duplicate)
/* Convert VALUEs to type in which the comparisons are nominally done. */
if (value1 == 0) /* Negative infinity. */
value1 = TYPE_MIN_VALUE(index_type);
value1 = TYPE_MIN_VALUE (index_type);
value1 = (*converter) (nominal_type, value1);
if (value2 == 0) /* Positive infinity. */
value2 = TYPE_MAX_VALUE(index_type);
value2 = TYPE_MAX_VALUE (index_type);
value2 = (*converter) (nominal_type, value2);
/* Fail if these values are out of range. */
@ -4538,10 +4542,6 @@ pushcase_range (value1, value2, converter, label, duplicate)
if (! int_fits_type_p (value2, index_type))
return 3;
/* Fail if the range is empty. */
if (tree_int_cst_lt (value2, value1))
return 4;
return add_case_node (value1, value2, label, duplicate);
}