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Revision tags: llvmorg-18.1.8, llvmorg-18.1.7, llvmorg-18.1.6, llvmorg-18.1.5, llvmorg-18.1.4, llvmorg-18.1.3, llvmorg-18.1.2, llvmorg-18.1.1, llvmorg-18.1.0, llvmorg-18.1.0-rc4, llvmorg-18.1.0-rc3, llvmorg-18.1.0-rc2
# ff9af4c4 05-Feb-2024 Nikita Popov <npopov@redhat.com>

[CodeGen] Convert tests to opaque pointers (NFC)


Revision tags: llvmorg-18.1.0-rc1, llvmorg-19-init, llvmorg-17.0.6, llvmorg-17.0.5, llvmorg-17.0.4, llvmorg-17.0.3, llvmorg-17.0.2, llvmorg-17.0.1, llvmorg-17.0.0, llvmorg-17.0.0-rc4, llvmorg-17.0.0-rc3, llvmorg-17.0.0-rc2, llvmorg-17.0.0-rc1, llvmorg-18-init, llvmorg-16.0.6, llvmorg-16.0.5, llvmorg-16.0.4, llvmorg-16.0.3, llvmorg-16.0.2, llvmorg-16.0.1, llvmorg-16.0.0, llvmorg-16.0.0-rc4
# 5fdab3c8 07-Mar-2023 wangpc <pc.wang@linux.alibaba.com>

[RISCV] Enable machine copy propagation for copy-like instructions

Like what has been done in AArch64 (D125335).

We enable this under `-O2` to show the codegen diffs here but we
may only do this un

[RISCV] Enable machine copy propagation for copy-like instructions

Like what has been done in AArch64 (D125335).

We enable this under `-O2` to show the codegen diffs here but we
may only do this under `-O3` like AArch64.

There are two cases that we may produce these eliminable copies:
1. ISel of `FrameIndex`. Like `rvv/fixed-vectors-calling-conv.ll`.
2. Tail duplication. Like `select-optimize-multiple.ll`.

Reviewed By: craig.topper

Differential Revision: https://reviews.llvm.org/D144535

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