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Make LLVM timer reprintable: that is, make more than one print action on the same timer feasible

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Currently, each LLVM timer can be only printed once, as the act of
printing clears the timer.

Moreover, the current printing mechanism implicitly assumes that the
timer is stopped -- and prints zero otherwise.
This patch relaxes this assumption and makes printing statistics
multiple time a possibility.

Differential Revision: https://reviews.llvm.org/D43136

llvm-svn: 324788
This commit is contained in:
George Karpenkov 2018-02-10 00:38:21 +00:00
parent 7c35687d1c
commit 8a94c746f9
1 changed files with 10 additions and 2 deletions
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12
lib/Support/Timer.cpp
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@ -336,10 +336,14 @@ void TimerGroup::prepareToPrintList() {
// reset them.
for (Timer *T = FirstTimer; T; T = T->Next) {
if (!T->hasTriggered()) continue;
bool WasRunning = T->isRunning();
if (WasRunning)
T->stopTimer();
TimersToPrint.emplace_back(T->Time, T->Name, T->Description);
// Clear out the time.
T->clear();
if (WasRunning)
T->startTimer();
}
}
@ -381,6 +385,10 @@ const char *TimerGroup::printJSONValues(raw_ostream &OS, const char *delim) {
printJSONValue(OS, R, ".user", T.getUserTime());
OS << delim;
printJSONValue(OS, R, ".sys", T.getSystemTime());
if (T.getMemUsed()) {
OS << delim;
printJSONValue(OS, R, ".sys", T.getMemUsed());
}
}
TimersToPrint.clear();
return delim;