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We simply always assume that Sel can only return a null pointer if
its input is a null pointer.

They have been unnecessary aliases for is_SymConst_addr_ent() and
get_SymConst_entity().

[r28127]

[r28075]

[r28062]

[r28041]

[r28030]

[r27968]

[r27924]

[r27267]

[r27145]

[r22754]

[r21832]

[r20951]

 - add new operations computed_value_Proj() and equivalent_node_Proj()
 - computed_value_func() uses now const ir_node *
 - removed some old code

[r20950]

 - use value_of() instead of is_Const() tests to allow interaction with combo
 - new nodes in equivalent_node are NOT allowed
 - turn_into_tuple() in equivalent_node is NOT allowed
 - do NOT allow equivalent nodes for mode_T nodes!

BugFix:
 - value_not_null() checked for wrong pnc

[r20946]

[r19089]

- value_not_zero(): safely skip Minus and Abs nodes
- classify_value_sign(): handle Minus nodes

[r18197]

[r17143]

[r15843]

[r15842]

[r15837]

[r14366]

[r14361]

[r14307]

[r14303]

[r14295]

changed indentation

[r13574]

[r13510]

the Confirm node that causes the confirmation.

[r8009]

[r7275]

[r7238]

[r6934]

[r6730]

[r6458]

added triangle inequality to determine values
fixed confirm code (again)

[r6149]