Displaying 1 result from an estimated 1 matches for "a1_64".
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a1_4
2015 Feb 04
2
[LLVMdev] Handling of KILL instructions.
Hi all,
My understanding is that we keep around KILL instructions in order to keep
the results of the various register liveness analysis passes valid.
Consider for example the following machine basic block:
BB#0: derived from LLVM BB %entry
Live Ins: %A0_64 %A1_64
%V0_64<def> = AND64 %A0_64<kill>, %A1_64<kill>
%V0<def> = KILL %V0, %V0_64<imp-use,kill>
PseudoReturn64 %RA_64
In this case we would like to move the AND64 instruction after the KILL
instruction (generated from an identity COPY).
What is the r...