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[PATCH 4/5] Altera Nios II: dwarf generation fix

This patch was a fix by Julian which corrected a HOST_BITS_PER_WIDE_INT
host dependency in dwarf generation. Nios II does not have
need_64bit_hwint switched on during configuring, and ran into GDB test
FAILs originating from this problem.

2013-04-18  Julian Brown  <>

        * dwarf2out.c (gen_enumeration_type_die): Fix
	HOST_BITS_PER_WIDE_INT dependency behavior in enumeration type
	DIE generation.
Index: gcc/dwarf2out.c
--- gcc/dwarf2out.c	(revision 407083)
+++ gcc/dwarf2out.c	(revision 409063)
@@ -17025,15 +17025,21 @@
 	  if (TREE_CODE (value) == CONST_DECL)
 	    value = DECL_INITIAL (value);
-	  if (host_integerp (value, TYPE_UNSIGNED (TREE_TYPE (value))))
+	  if (host_integerp (value, TYPE_UNSIGNED (TREE_TYPE (value)))
+	      && (simple_type_size_in_bits (TREE_TYPE (value))
+		  <= HOST_BITS_PER_WIDE_INT || host_integerp (value, 0)))
 	    /* DWARF2 does not provide a way of indicating whether or
 	       not enumeration constants are signed or unsigned.  GDB
 	       always assumes the values are signed, so we output all
 	       values as if they were signed.  That means that
 	       enumeration constants with very large unsigned values
 	       will appear to have negative values in the debugger.  */
-	    add_AT_int (enum_die, DW_AT_const_value,
-			tree_low_cst (value, tree_int_cst_sgn (value) > 0));
+	    add_AT_int (enum_die, DW_AT_const_value, TREE_INT_CST_LOW (value));
+	  else
+	    /* Enumeration constants may be wider than HOST_WIDE_INT.  Handle
+	       that here.  */
+	    add_AT_double (enum_die, DW_AT_const_value,
+			   TREE_INT_CST_HIGH (value), TREE_INT_CST_LOW (value));
       add_gnat_descriptive_type_attribute (type_die, type, context_die);

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