operand of the instruction and thus simplify the register allocation.

llvm-svn: 11124

llvm-svn: 11091

llvm-svn: 11087

Fix a spello
Tighten up the assertion checking

No functionality changes.

llvm-svn: 11036

* Turn a bunch of instance variables into automatic variables

llvm-svn: 11035

Move Passes.h (which defines the interface to this file) to the top.
Move statistics to the top of the file.
Add a comment

llvm-svn: 11034

LiveVariables::HandlePhysRegDef private they use information that is
not in memory when LiveVariables finishes the analysis.

Also update the TwoAddressInstructionPass to not use this interface.

llvm-svn: 10755

llvm-svn: 10692

A = B op C where A == C, but this cannot really occur in practice
because of SSA form. Add an assert to check that just to be safe.

llvm-svn: 10682

llvm-svn: 10681

instead, since this pass doesn't expose any state to its users.

llvm-svn: 10520

more operands and the two first operands are constrained to be the
same. The pass takes an instruction of the form:

        a = b op c

and transforms it into:

        a = b
        a = a op c

and also preserves live variables.

llvm-svn: 10512