[LTO] Add stats-file option to LTO/Config.h.
This patch adds a StatsFile option to LTO/Config.h and updates both
LLVMGold and llvm-lto2 to set it.
Reviewers: MatzeB, tejohnson, espindola
Reviewed By: tejohnson
Differential Revision: https://reviews.llvm.org/D45531
llvm-svn: 330411
diff --git a/llvm/lib/LTO/LTO.cpp b/llvm/lib/LTO/LTO.cpp
index e4dffbf..186e3d2 100644
--- a/llvm/lib/LTO/LTO.cpp
+++ b/llvm/lib/LTO/LTO.cpp
@@ -12,6 +12,7 @@
//===----------------------------------------------------------------------===//
#include "llvm/LTO/LTO.h"
+#include "llvm/ADT/Statistic.h"
#include "llvm/Analysis/TargetLibraryInfo.h"
#include "llvm/Analysis/TargetTransformInfo.h"
#include "llvm/Bitcode/BitcodeReader.h"
@@ -791,9 +792,26 @@
};
computeDeadSymbols(ThinLTO.CombinedIndex, GUIDPreservedSymbols, isPrevailing);
- if (auto E = runRegularLTO(AddStream))
- return E;
- return runThinLTO(AddStream, Cache);
+ // Setup output file to emit statistics.
+ std::unique_ptr<ToolOutputFile> StatsFile = nullptr;
+ if (!Conf.StatsFile.empty()) {
+ EnableStatistics(false);
+ std::error_code EC;
+ StatsFile =
+ llvm::make_unique<ToolOutputFile>(Conf.StatsFile, EC, sys::fs::F_None);
+ if (EC)
+ return errorCodeToError(EC);
+ StatsFile->keep();
+ }
+
+ Error Result = runRegularLTO(AddStream);
+ if (!Result)
+ Result = runThinLTO(AddStream, Cache);
+
+ if (StatsFile)
+ PrintStatisticsJSON(StatsFile->os());
+
+ return Result;
}
Error LTO::runRegularLTO(AddStreamFn AddStream) {