[llvm-branch-commits] [llvm] [AArch64][llvm] Fix encoding for `stshh` instruction (#189588) (PR #189679)

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llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-backend-aarch64

Author: Jonathan Thackray (jthackray)

<details>
<summary>Changes</summary>

The encoding for `stshh` was incorrect, and has been fixed. This has been checked against the Arm ARM.

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Full diff: https://github.com/llvm/llvm-project/pull/189679.diff


2 Files Affected:

- (modified) llvm/lib/Target/AArch64/AArch64InstrFormats.td (+1-1) 
- (modified) llvm/test/MC/AArch64/armv9.6a-pcdphint.s (+4-4) 


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https://github.com/llvm/llvm-project/pull/189679