[Support][CachePruning] Disable cache pruning regression fix

borked by: rL284966 (see: https://reviews.llvm.org/D25730).

Previously, Interval was unsigned (see: CachePruning.h), replacing the type with std::chrono::seconds (which is signed) causes a regression in behaviour because the c-api intends negative values to translate to large positive intervals to *effectively* disable the pruning (see comments on: setCachePruningInterval()).

Differential Revision: https://reviews.llvm.org/D41231

llvm-svn: 321077

1 files changed, 4 insertions, 0 deletions

diff --git a/llvm/tools/llvm-lto/llvm-lto.cpp b/llvm/tools/llvm-lto/llvm-lto.cpp
index 20c6813968b..7d71a3e8dfe 100644
--- a/llvm/tools/llvm-lto/llvm-lto.cpp
+++ b/llvm/tools/llvm-lto/llvm-lto.cpp
@@ -156,6 +156,9 @@ static cl::opt<std::string> ThinLTOModuleId(
 static cl::opt<std::string>
     ThinLTOCacheDir("thinlto-cache-dir", cl::desc("Enable ThinLTO caching."));
 
+static cl::opt<int>
+    ThinLTOCachePruningInterval("thinlto-cache-pruning-interval", cl::desc("Set ThinLTO cache pruning interval."));
+
 static cl::opt<std::string> ThinLTOSaveTempsPrefix(
     "thinlto-save-temps",
     cl::desc("Save ThinLTO temp files using filenames created by adding "
@@ -470,6 +473,7 @@ public:
     ThinGenerator.setCodePICModel(getRelocModel());
     ThinGenerator.setTargetOptions(Options);
     ThinGenerator.setCacheDir(ThinLTOCacheDir);
+    ThinGenerator.setCachePruningInterval(ThinLTOCachePruningInterval);
     ThinGenerator.setFreestanding(EnableFreestanding);
 
     // Add all the exported symbols to the table of symbols to preserve.