Add pass printing support to BlockFrequencyInfo pass. The implementation

layer already had support for printing the results of this analysis, but
the wiring was missing.

Now that printing the analysis works, actually bring some of this
analysis, and the BranchProbabilityInfo analysis that it wraps, under
test! I'm planning on fixing some bugs and doing other work here, so
having a nice place to add regression tests and a way to observe the
results is really useful.

llvm-svn: 142491

1 files changed, 4 insertions, 0 deletions

diff --git a/llvm/lib/Analysis/BlockFrequencyInfo.cpp b/llvm/lib/Analysis/BlockFrequencyInfo.cpp
index ee899153e1d..d16665fa55c 100644
--- a/llvm/lib/Analysis/BlockFrequencyInfo.cpp
+++ b/llvm/lib/Analysis/BlockFrequencyInfo.cpp
@@ -49,6 +49,10 @@ bool BlockFrequencyInfo::runOnFunction(Function &F) {
   return false;
 }
 
+void BlockFrequencyInfo::print(raw_ostream &O, const Module *) const {
+  if (BFI) BFI->print(O);
+}
+
 /// getblockFreq - Return block frequency. Return 0 if we don't have the
 /// information. Please note that initial frequency is equal to 1024. It means
 /// that we should not rely on the value itself, but only on the comparison to