[LLVMdev] Promotion of integral values

[Robert L. Bocchino Jr.]

There's some optimization that turns expressions like this:

   short a = ...
   short b =
   int a' = cast short a to int
   int b' = cast short b to int
   int c = a' + b'

into this:

   short a = ...
   short b = ...
   uint a' = cast short a to uint
   uint b' = cast short b to uint
   uint c = a' + b'
   int c = cast uint c to int

Does anyone know which optimization is doing this?  I'd like to be able 
to turn it off.

Rob

Robert L. Bocchino Jr.
Ph.D. Student, Computer Science
University of Illinois, Urbana-Champaign
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