[llvm-dev] grouping global variables by alignment: safe to do at LLVM level, or only at Clang level?

Tim Northover via llvm-dev llvm-dev at lists.llvm.org
Tue Jul 26 10:22:46 PDT 2016

> I’m saying that it is *already* the current state of affairs, AFAIK we don’t provide any guarantee about what you describes.

We already do some quite invasive things to real-world globals that
would violate such assumptions. We increase their alignment beyond ABI
requirements if we think it's helpful; the GlobalMerge pass sorts
globals before shoving them all under one symbol (in increasing order
size for some reason that escapes me right now).


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