[PATCH] D57335: [IR] Don't assume all functions are 4 byte aligned

Michael Platings via Phabricator via cfe-commits cfe-commits at lists.llvm.org
Mon Feb 25 09:34:10 PST 2019


michaelplatings marked 4 inline comments as done.
michaelplatings added inline comments.


================
Comment at: llvm/lib/IR/ConstantFold.cpp:1087
+          if (GVAlign == 0U && isa<Function>(GV))
+            GVAlign = 4U;
 
----------------
efriedma wrote:
> Using "4" as a default is dangerous; on x86, the alignment of the pointer corresponds to the alignment of the function, but might be less than 4 if it isn't explicitly specified.
I've put in a comment to say as much. Sadly I'm not in a position to change this behaviour without causing a code size regression.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D57335/new/

https://reviews.llvm.org/D57335





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