llvm/llvm-project
[NVPTX] Implement `TLI.isTruncateFree(EVT, EVT)` and `TLI.isZExtFree()`
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#114,339 opened on 2024/10/31
backend:NVPTXgood first issue
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説明
NVPTX currently does not override TLI.isTruncateFree(EVT, EVT) and TLI.isZExtFree(), and it probably should.
zext/truncate between i32/i64 can probably be considered free, as the values already live in separate 32-bit registers in hardware.
Originally posted by @Artem-B in https://github.com/llvm/llvm-project/pull/98666#discussion_r1681805956