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Normally, if the registers holding the induction variable's bounds are redefined inside of the loop's body, the loop cannot be converted to a hardware loop. However, if the redefining instruction is actually loading an immediate value into the register, this conversion is both possible and legal (since the immediate itself will be used in the loop setup in the preheader). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@316218 91177308-0d34-0410-b5e6-96231b3b80d8
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