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e4eff4b231
If we duplicate an instruction then we must also clear kill flags on any uses we rewrite. Otherwise we might be killing a register which was used in other BBs. For example, here the entry BB ended up with these instructions, the ADD having been tail duplicated. %vreg24<def> = t2ADDri %vreg10<kill>, 1, pred:14, pred:%noreg, opt:%noreg; GPRnopc:%vreg24 rGPR:%vreg10 %vreg22<def> = COPY %vreg10; GPR:%vreg22 rGPR:%vreg10 The copy here is inserted after the add and so needs vreg10 to be live. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@236782 91177308-0d34-0410-b5e6-96231b3b80d8 |
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