https://bugs.llvm.org/show_bug.cgi?id=46127
Bug ID: 46127
Summary: wasm miscompilation of vector instructions
Product: libraries
Version: 10.0
Hardware: All
OS: All
Status: NEW
Severity: normal
Priority: P
Component: Backend: WebAssembly
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Created attachment 23548
--> https://bugs.llvm.org/attachment.cgi?id=23548&action=edit
LLVM IR of the reduction
Summary:
Vector of non-byte-aligned elements get miscompiled with `llc -O0`. Additional
optimisation passes seem to rectify the problem (although I cannot say for sure
whether that's always the case). Anyhow, see downstream issue for more details
and full analysis: https://github.com/ziglang/zig/issues/5339
Possibly (very likely) related: https://bugs.llvm.org/show_bug.cgi?id=43768.
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