[llvm] [AArch64] Remove superfluous bitconvert from bfdot lane pattern (PR #221745)

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llvmorg-github-actions[bot] wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-backend-aarch64

Author: David Green (davemgreen)

<details>
<summary>Changes</summary>

We don't need to detect the outermost bitconvert, and it might well have been optimised away. Fixes a regression since llvm 21.

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Full diff: https://github.com/llvm/llvm-project/pull/221745.diff


2 Files Affected:

- (modified) llvm/lib/Target/AArch64/AArch64InstrFormats.td (+2-2) 
- (modified) llvm/test/CodeGen/AArch64/aarch64-bf16-dotprod-intrinsics.ll (+18) 


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The server didn't respond in time.
</body></html>

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</details>


https://github.com/llvm/llvm-project/pull/221745