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Chris Tate
aead30fc26
The sanitized lane's -fsanitize=address link needs the attribute to instrument the emitted functions. Without a sanitizer pass it is not inert: LLVM does not shrink-wrap functions that carry it, so every call saved and restored all of a function's callee-saved registers on entry, including on paths that return before any call, and it blocks speculative loads. The LLVM helper already dropped it for builds that import runtime bitcode (speed); release builds kept it. - The new sanitizeAttributes option (default true for direct emission) is set from --sanitize wherever objectAudit is. - Without it and without a target CPU level, attribute group #0 holds a string attribute LLVM ignores, since a group cannot be empty.