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computeliveins
2017 Aug 03
2
Re-computing Live-in/Live-out Physical Registers for Basic Blocks Using LivePhysRegs
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>>Class LivePhysRegs seems to be able to compute live-in/live-out registers for a given machine basic block based on live-in registers of its successors. It appears to me that, if I perform a depth-first traversal through the control flow graph of a function, calling LivePhysRegs::computeLiveIns on every machine basic block, live-in/live-out physical registers are computed for every basic block. Is this true?
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>>Also, I would like to know whether APSR is dead or not on entry and exit of every basic block. Is the register treated by LLVM specially or in the same wa...