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from c297153c364 [MachineOutliner] Fix offset overflow check new 134f1a833f6 [PGO] detect infinite loop and form MST properly new 491343d2fa2 Temporarily revert "[PowerPC] Allow tail calls of fastcc fu [...]

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Summary of changes: include/llvm/Analysis/BlockFrequencyInfo.h | 1 + include/llvm/Analysis/BlockFrequencyInfoImpl.h | 1 + lib/Analysis/BlockFrequencyInfo.cpp | 4 ++ lib/Target/PowerPC/PPCISelLowering.cpp | 15 +++---- lib/Transforms/Instrumentation/CFGMST.h | 24 +++++++++-- .../Instrumentation/PGOInstrumentation.cpp | 46 ++++++---------------- .../PowerPC/duplicate-returns-for-tailcall.ll | 6 +-- test/Transforms/PGOProfile/infinite_loop_gen.ll | 18 +++++++++ 8 files changed, 64 insertions(+), 51 deletions(-) create mode 100644 test/Transforms/PGOProfile/infinite_loop_gen.ll