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[SR-13373] [docs] Document what arguments -Xllvm supports. #55813

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typesanitizer opened this issue Aug 9, 2020 · 1 comment
Open

[SR-13373] [docs] Document what arguments -Xllvm supports. #55813

typesanitizer opened this issue Aug 9, 2020 · 1 comment
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bug A deviation from expected or documented behavior. Also: expected but undesirable behavior.

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Previous ID SR-13373
Radar rdar://problem/67360661
Original Reporter @typesanitizer
Type Bug
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Votes 0
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Labels Bug
Assignee None
Priority Medium

md5: 5668fc922da22bafdf09a3509eb41c1a

Issue Description:

https://forums.swift.org/t/can-the-compiler-optimize-into-fma-instructions/39217/2

Looks like we can't directly pass llc flags to -Xllvm ; if that's the case, then we have to rely on basically the compiler's test cases to understand what can/cannot be passed to -Xllvm. This is poor UX and also different from how -Xcc works. We should list what flags are supported in one place.
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@swift-ci create

@swift-ci swift-ci transferred this issue from apple/swift-issues Apr 25, 2022
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bug A deviation from expected or documented behavior. Also: expected but undesirable behavior.
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