Fix crash in fold_range_test

From-SVN: r37712

Fix crash in fold_range_test
From-SVN: r37712
7cf5c9e1 · Bernd Schmidt · Bernd Schmidt · ff6534ad · 7cf5c9e1 · 7cf5c9e1
Commit 7cf5c9e1 authored Nov 24, 2000 by Bernd Schmidt Committed by Bernd Schmidt Nov 24, 2000
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gcc/ChangeLog
+2 -0

gcc/fold-const.c
+1 -0

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--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
 2000-11-24  Bernd Schmidt  <bernds@redhat.co.uk>

+	* fold-const.c (fold_range_test): Avoid crash if LHS or RHS is null.
+
 	* reload1.c (conflicts_with_override): New function.
 	(emit_input_reload_insns): Use it to tighten test for validity
 	of substituting into output of previous insn.

--- a/gcc/fold-const.c
+++ b/gcc/fold-const.c
@@ -3780,6 +3780,7 @@ fold_range_test (exp)
     short-circuited branch and the underlying object on both sides
     is the same, make a non-short-circuit operation.  */
  else if (BRANCH_COST >= 2
+	   && lhs != 0 && rhs != 0
 	   && (TREE_CODE (exp) == TRUTH_ANDIF_EXPR
 	       || TREE_CODE (exp) == TRUTH_ORIF_EXPR)
 	   && operand_equal_p (lhs, rhs, 0))