Allow 0 to be a valid value pruning interval in C LTO API. Value 0 will cause garbage collector to run. This matches the behavior in C++ LTO API.

llvm-svn: 325303

2 files changed, 5 insertions, 5 deletions

diff --git a/llvm/include/llvm-c/lto.h b/llvm/include/llvm-c/lto.h
index 8ea24244034..4eee5f1f113 100644
--- a/llvm/include/llvm-c/lto.h
+++ b/llvm/include/llvm-c/lto.h
@@ -784,7 +784,7 @@ extern void thinlto_codegen_set_cache_dir(thinlto_code_gen_t cg,
 /**
  * Sets the cache pruning interval (in seconds). A negative value disables the
  * pruning. An unspecified default value will be applied, and a value of 0 will
- * be ignored.
+ * force prunning to occur.
  *
  * \since LTO_API_VERSION=18
  */
diff --git a/llvm/include/llvm/LTO/legacy/ThinLTOCodeGenerator.h b/llvm/include/llvm/LTO/legacy/ThinLTOCodeGenerator.h
index 07e45d4c122..e47456445f0 100644
--- a/llvm/include/llvm/LTO/legacy/ThinLTOCodeGenerator.h
+++ b/llvm/include/llvm/LTO/legacy/ThinLTOCodeGenerator.h
@@ -131,7 +131,8 @@ public:
    * To avoid filling the disk space, a few knobs are provided:
    *  - The pruning interval limit the frequency at which the garbage collector
    *    will try to scan the cache directory to prune it from expired entries.
-   *    Setting to -1 disable the pruning (default).
+   *    Setting to -1 disable the pruning (default). Setting to 0 will force
+   *    pruning to occur.
    *  - The pruning expiration time indicates to the garbage collector how old
    *    an entry needs to be to be removed.
    *  - Finally, the garbage collector can be instructed to prune the cache till
@@ -149,10 +150,9 @@ public:
   void setCacheDir(std::string Path) { CacheOptions.Path = std::move(Path); }
 
   /// Cache policy: interval (seconds) between two prunes of the cache. Set to a
-  /// negative value to disable pruning. A value of 0 will be ignored.
+  /// negative value to disable pruning. A value of 0 will force pruning to
+  /// occur.
   void setCachePruningInterval(int Interval) {
-    if (Interval == 0)
-      return;
     if(Interval < 0)
       CacheOptions.Policy.Interval.reset();
     else