* simplify-rtx.c (simplify_unary_operation_1) <POPCOUNT>: We can

[pf3gnuchains/gcc-fork.git] / gcc / ChangeLog

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+2007-02-08  Roger Sayle  <roger@eyesopen.com>
+
+       * simplify-rtx.c (simplify_unary_operation_1) <POPCOUNT>: We can
+       strip zero_extend, bswap and rotates from POCOUNT's argument.
+       <PARITY>: Likewise, we can strip not, bswap, sign_extend,
+       zero_extend and rotates from PARITY's argument.
+       <BSWAP>: A byte-swap followed by a byte-swap is an identity.
+       (simplify_const_unary_operation) <BSWAP>: Evaluate the byte-swap
+       of an integer constant at compile-time.
+
 2007-02-08  Diego Novillo  <dnovillo@redhat.com>
 
        PR 30562