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Add flag -swift-async-framepointer=auto,never,always to

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control swift extended frame information emission

On linux we default to disable the extended frame info (since the system
libraries don't support it).

On darwin the default is to automatically choose based on the deployment target.

The Concurrency library explicitly forces extended frame information and the
back deployment library explicitly disables it.
This commit is contained in:
Arnold Schwaighofer
2021-09-14 12:46:48 -07:00
parent e1e3824ebc
commit 2381233ac1
7 changed files with 90 additions and 2 deletions
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18
lib/Frontend/CompilerInvocation.cpp
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@@ -1908,6 +1908,24 @@ static bool ParseIRGenArgs(IRGenOptions &Opts, ArgList &Args,
Opts.VirtualFunctionElimination = true;
}
// Default to disabling swift async extended frame info on linux.
if (Triple.getOS() == llvm::Triple::Linux) {
Opts.SwiftAsyncFramePointer = SwiftAsyncFramePointerKind::Never;
}
if (const Arg *A = Args.getLastArg(OPT_swift_async_frame_pointer_EQ)) {
StringRef mode(A->getValue());
if (mode == "auto")
Opts.SwiftAsyncFramePointer = SwiftAsyncFramePointerKind::Auto;
else if (mode == "always")
Opts.SwiftAsyncFramePointer = SwiftAsyncFramePointerKind::Always;
else if (mode == "never")
Opts.SwiftAsyncFramePointer = SwiftAsyncFramePointerKind::Never;
else {
Diags.diagnose(SourceLoc(), diag::error_invalid_arg_value,
A->getAsString(Args), A->getValue());
}
}
return false;
}