Teach the pass manager's execution dump to print the current time before
each line. This is particularly nice for tracking which run of
a particular pass over a particular function was slow.
This also required making the TimeValue string much more useful. First,
there is a standard format for writing out a date and time. Let's use
that rather than strings that would have to be parsed. Second, actually
output the nanosecond resolution that timevalue claims to have.
This is proving useful working on PR19499, so I figured it would be
generally useful to commit.
llvm-svn: 207385
GitOrigin-RevId: 20c5693e9e9d0cc801bc2411870b1a9d6362f425
diff --git a/lib/IR/LegacyPassManager.cpp b/lib/IR/LegacyPassManager.cpp
index 1ad0498..b6d75b4 100644
--- a/lib/IR/LegacyPassManager.cpp
+++ b/lib/IR/LegacyPassManager.cpp
@@ -22,6 +22,7 @@
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/ManagedStatic.h"
#include "llvm/Support/Mutex.h"
+#include "llvm/Support/TimeValue.h"
#include "llvm/Support/Timer.h"
#include "llvm/Support/raw_ostream.h"
#include <algorithm>
@@ -1158,7 +1159,8 @@
StringRef Msg) {
if (PassDebugging < Executions)
return;
- dbgs() << (void*)this << std::string(getDepth()*2+1, ' ');
+ dbgs() << "[" << sys::TimeValue::now().str() << "] " << (void *)this
+ << std::string(getDepth() * 2 + 1, ' ');
switch (S1) {
case EXECUTION_MSG:
dbgs() << "Executing Pass '" << P->getPassName();
diff --git a/lib/Support/Unix/TimeValue.inc b/lib/Support/Unix/TimeValue.inc
index 80532b0..58c7ba3 100644
--- a/lib/Support/Unix/TimeValue.inc
+++ b/lib/Support/Unix/TimeValue.inc
@@ -26,9 +26,11 @@
struct tm Storage;
struct tm *LT = ::localtime_r(&OurTime, &Storage);
assert(LT);
- char Buffer[25];
- strftime(Buffer, 25, "%b %e %H:%M %Y", LT);
- return std::string(Buffer);
+ char Buffer1[sizeof("YYYY-MM-DD HH:MM:SS")];
+ strftime(Buffer1, sizeof(Buffer1), "%Y-%m-%d %H:%M:%S", LT);
+ char Buffer2[sizeof("YYYY-MM-DD HH:MM:SS.MMMUUUNNN")];
+ snprintf(Buffer2, sizeof(Buffer2), "%s.%.9u", Buffer1, this->nanoseconds());
+ return std::string(Buffer2);
}
TimeValue TimeValue::now() {
