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...ble to reproduce this problem on an in-tree target. /Patrik Hägglund [MachineSinking] Conservatively clear kill flags after coalescing. This solves the problem of having a kill flag inside a loop with a definition of the register prior to the loop: %vreg368<def> ... Inside loop: %vreg520<def> = COPY %vreg368 %vreg568<def,tied1> = add %vreg341<tied0>, %vreg520<kill> => was coalesced into => %vreg568<def,tied1> = add %vreg341<tied0>, %vreg368<kill> MachineVerifier then complained: *** Bad machine code: Virtual registe...

...gs after coalescing. >>> >>> This solves the problem of having a kill flag inside a loop >>> with a definition of the register prior to the loop: >>> >>> %vreg368<def> ... >>> >>> Inside loop: >>> >>> %vreg520<def> = COPY %vreg368 >>> %vreg568<def,tied1> = add %vreg341<tied0>, %vreg520<kill> >>> >>> => was coalesced into => >>> >>> %vreg568<def,tied1> =add%vreg341<tied0>, %vreg368<kill> >>&g...