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[block-freq] Add a print method on BlockFrequencyImpl for printing block frequencies and a convenience method for the common case of getting/printing a basic block.

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BlockFrequencies can only be printed relative to their entry frequency. Thus
since the entry frequency is no longer necessarily a static constant on the
BlockFrequency class and is instead a potentially dynamic value taken from
BlockFrequencyImpl, we must necessarily print it via a method on
BlockFrequencyImpl.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@197285 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Michael Gottesman 2013-12-13 23:59:44 +00:00
parent ccf34d2295
commit 5efbda1437
1 changed files with 24 additions and 0 deletions
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24
include/llvm/Analysis/BlockFrequencyImpl.h
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@ -343,6 +343,30 @@ public:
void dump() const {
print(dbgs());
}
// Utility method that looks up the block frequency associated with BB and
// prints it to OS.
raw_ostream &printBlockFreq(raw_ostream &OS,
const BlockT *BB) {
return printBlockFreq(OS, getBlockFreq(BB));
}
raw_ostream &printBlockFreq(raw_ostream &OS,
const BlockFrequency &Freq) const {
// Convert fixed-point number to decimal.
uint64_t Frequency = Freq.getFrequency();
OS << Frequency / EntryFreq << ".";
uint64_t Rem = Frequency % EntryFreq;
uint64_t Eps = 1;
do {
Rem *= 10;
Eps *= 10;
OS << Rem / EntryFreq;
Rem = Rem % EntryFreq;
} while (Rem >= Eps/2);
return OS;
}
};
}