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Gmane
From: Matthias Braun <mbraun <at> apple.com>
Subject: Pristine Register Semantics
Newsgroups: gmane.comp.compilers.llvm.devel
Date: Friday 29th May 2015 00:05:08 UTC (over 2 years ago)
This is just a short heads-up for out-of-tree targets relying on the
concept of pristine registers. I slightly changed their semantics in
r238524 (see http://reviews.llvm.org/D10101
<http://reviews.llvm.org/D10101>
for details). If you happened to not use the RegisterScavenger to get
liveness past the PrologueEpilogue inserted and relied on
MachineFrameInfo::getPristineRegs() without at same time relying on the
machine basic blocks live-in sets then you may be affected by it.

- Matthias
 
CD: 4ms