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store EAX -> [ss#0] [ss#0] += 1 ... use(EAX) In this case, it is not valid to rewrite this as: store EAX -> [ss#0] EAX += 1 store EAX -> [ss#0] ;;; this would also delete the store above ... use(EAX) ... because EAX is not a dead at that point. Keep track of which registers we are allowed to clobber, and which ones we aren't, and don't clobber the ones we're not supposed to. :) This should resolve the issues on X86 last night. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25948 91177308-0d34-0410-b5e6-96231b3b80d8 |
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