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  1. Jan 30, 1991
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    • ram's avatar
      Mucho enhancements. · a587cf3f
      ram authored
      If we discover a known call, and that call has a source transform or is a
      	
      conditional, then we replace the function with a lambda that
      just calls the function again.  This gives IR1 conversion another chance
      to permute the call.
      Changed IR1 transforms to test the function type with :STRICT-RESULT T
      since this is almost always what you want when writing a transform.
      In constant folding, if the call returns multiple values, change
      the function to a call to VALUES, rather than just blowing off
      constant folding.
      Added DELETE-LET which deletes the bind node for a let when all 
      its variables are deleted.  This cleans up the IR1 a great deal, enabling
      some optimizations.
      Added an IR1 optimizer for VALUES that converts MV-BIND/VALUES into a
      LET (as long as the VALUES is the only use of the values continuation.)
      This helps optimization of the results of IR1 transforms for multiple
      value functions.
      Added a IR1 transform for VALUES that discards all but the first
      value when the context is not a multiple-value receiver.
      a587cf3f
    • ram's avatar
    • ram's avatar
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