[llvm-commits] [PATCH] Simplify RegScavenger::FindUnusedReg

[Jakob Stoklund Olesen]

Hi,

The attached patch simplifies RegScavenger::FindUnusedReg() by  
removing the "Candidates" argument. It also fixes a potential bug  
where FindUnusedReg() could return a register with in-use aliases.

The RegScavenger is now tracking spilled callee saved registers, so  
there is no longer a need for the "Candidates" argument or the  
"ExCalleeSaved" variant.

Since I am changing the RegScavenger API just before the upcoming code  
freeze, I thought I had better ask for a review before committing.

/jakob

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