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[release/20.x] Update release notes for SystemZ changes #140060

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Jun 12, 2025
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[release/20.x] Update release notes for SystemZ changes #140060

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9 changes: 9 additions & 0 deletions llvm/docs/ReleaseNotes.md
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Expand Up @@ -349,6 +349,15 @@ Changes to the RISC-V Backend
extension.
* Added ``Sdext`` and ``Sdtrig`` extensions.

Changes to the SystemZ Backend
------------------------------

* Added support for the IBM z17 processor and the arch15 cpu architecture.
* Added support for `__builtin_setjump` and `__builtin_longjmp`.
* Improve inlining heuristics to fix compile time explosion in certain cases.
* Improve various cost functions.
* Improve compatibility of the assembler parser with the GNU assembler.

Changes to the WebAssembly Backend
----------------------------------

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