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2020 Feb 24
5
[RFC] DebugInfo: A different way of specifying variable locations post-isel
...ful, reducing the work needed to be done earlier in the compiler. Under the model described above, we can specify a program location before the corresponding machine location containing the variable value machine location becomes available. Consider this code: DBG_VALUE output-of-this-inst --- someinst1 | someinst2 | $rax = ADD32ri $rax, 0 <----- Where the line from DBG_VALUE to ADD32ri represents some as-yet-undetermined way of identifying the ADD32ri instruction from the DBG_VALUE. We can interpret such a code sequence as the variable hav...