[PATCH] Don't Promote x86_fp80 byval Pointer Arguments

[Thomas Jablin]

If the members of a structure passed by value are used only through geps and loads, the isSafeToPromoteArgument function will handle them correctly, so contrary to its name, the patch will allow byval x86_fp80*s to be promoted, provided they are used in a sane way. I have added a new testcase where the argument is used sanely, and consequently its argument is promoted.

http://reviews.llvm.org/D5057

Files:
  lib/Transforms/IPO/ArgumentPromotion.cpp
  test/Transforms/ArgumentPromotion/fp80.ll
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