[PATCH] D132073: [CodeGen] Zero out only modified registers

[Eli Friedman via Phabricator via llvm-commits]

efriedma added a comment.

> Zeroing out used, but not modified, registers can destroy the contents of non-volatile registers

Do you have a testcase?  All the changes to the regression tests involve argument registers, which are not preserved across calls.  (At least, by default; -mllvm -enable-ipra exists, but it's disabled at all optimization levels.)


Repository:
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https://reviews.llvm.org/D132073