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* [RISCV] Implement the TargetLowering::getRegisterByName hookLuís Marques2019-11-041-0/+38
Summary: The hook should work for any RISC-V register. Non-allocatable registers do not need to be reserved, for the remaining the hook will only succeed if you pass clang the -ffixed-xX flag. This builds upon D67185, which currently only allows reserving GPRs. Reviewers: asb, lenary Reviewed By: lenary Tags: #llvm Differential Revision: https://reviews.llvm.org/D69130
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