LLVM Weekly - #439, May 30th 2022
If you prefer, you can read a HTML version of this email at http://llvmweekly.org/issue/439.
Welcome to the four hundred and thirty-ninth issue of LLVM Weekly, a weekly newsletter (published every Monday) covering developments in LLVM, Clang, and related projects. LLVM Weekly is brought to you by Alex Bradbury. Subscribe to future issues at http://llvmweekly.org and pass it on to anyone else you think may be interested. Please send any tips or feedback to asb@asbradbury.org, or @llvmweekly or @asbradbury on Twitter.
News and articles from around the web
Krister Walfridsson blogged about branch / conditional move and compiler optimisations.
On the forums
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The minutes from the April 2022 LLVM Foundation Board Meeting have been posted.
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Tanya Lattner provided answers to frequently raised questions about the proposed LLVM project policy changes.
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Geoffrey Martin-Noble answered a question about support for running lit tests with Bazel.
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LLVM 14.0.4 was released.
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Lewis Revill announced monthly sync-ups on CHERI support in upstream LLVM and Rust.
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Min-Yih Hsu proposed always printing type aliases for certain types in the MLIR LLVM dialect.
LLVM commits
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The new
-print-on-crashoption will print out IR that caused the optimisation pipeline to crash. 24239e2. -
The RISC-V VSETVLI insertion pass was modified to perform a limited form of partial redundancy elimination. a95ecb2.
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The AArch64MachineScheduler will now attempt to order STP of Q registers by ascending address. 572fc7d.
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The SPIR-V version can now be set via the target triple. 72832ef.
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Heuristics for determining whether branches are more profitable than conditional moves were added. 8b42bc5, d7ebb74, 67be40d.
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Various stack frame alignment bugs with the RISC-V Vector extension were fixed. cb8681a, 08c9fb8.
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A new RISC-V pre-emit pass was added to modify instruction and register selection decisions in order to make more instruction comopressible. 29a5a7c.
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Pointer types can now be used for
atomicrmw xchg. 18e6b82. -
FileCheck gained the ability to catch misspelled directives. ad1d60c.
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The
G_IS_FPCLASSopcode was added to GlobalISel. bdd0093.
Clang commits
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The phrasing of diagnostics for strict function prototypes was improved. 681c50c.
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The
--offload-linkoption was introduced to perform offload device linking. b7c8c4d.