[PATCH] D133361: [BPF] Attribute preserve_static_offset for structs

[Alexei Starovoitov via Phabricator via cfe-commits]

ast added inline comments.


================
Comment at: clang/lib/CodeGen/CGExpr.cpp:3791
+  if (hasBPFPreserveStaticOffset(Base))
+    addr = wrapWithBPFPreserveStaticOffset(CGF, addr);
+
----------------
eddyz87 wrote:
> ast wrote:
> > If I'm reading this correctly wrapping with preserve_static_offset doesn't prevent further preserver_access_index wrapping which is a wasted effort for pai at the end ?
> Yes, pai calls are undone in `BPFPreserveStaticOffset.cpp:removePAICalls()`. I can put back the logic that suppresses pai if preserve static offset is present.
I see. I guess I missed a previous discussion. Why this approach was chosen?


Repository:
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  https://reviews.llvm.org/D133361/new/

https://reviews.llvm.org/D133361