[PATCH] PowerPC: CTR shouldn't fire if a TLS call is in the loop

[hfinkel at anl.gov]

LGTM, thanks!


================
Comment at: lib/Target/PowerPC/PPCCTRLoops.cpp:207
@@ +206,3 @@
+  TLSModel::Model Model = TM->getTLSModel(GV);
+  return Model == TLSModel::GeneralDynamic || Model == TLSModel::LocalDynamic;
+}
----------------
Please add a comment here explaining that determining the address of a TLS variable results in a function call in these TLS models.

http://reviews.llvm.org/D6786

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