vendor/llvm/llvm-trunk-r300422

1 files changed, 24 insertions, 6 deletions

diff --git a/include/llvm/Transforms/Scalar/LoopUnrollPass.h b/include/llvm/Transforms/Scalar/LoopUnrollPass.h
index 9da95ef81fad..7253bd09766e 100644
--- a/include/llvm/Transforms/Scalar/LoopUnrollPass.h
+++ b/include/llvm/Transforms/Scalar/LoopUnrollPass.h
@@ -16,12 +16,30 @@
 
 namespace llvm {
 
-struct LoopUnrollPass : public PassInfoMixin<LoopUnrollPass> {
-  Optional<unsigned> ProvidedCount;
-  Optional<unsigned> ProvidedThreshold;
-  Optional<bool> ProvidedAllowPartial;
-  Optional<bool> ProvidedRuntime;
-  Optional<bool> ProvidedUpperBound;
+class LoopUnrollPass : public PassInfoMixin<LoopUnrollPass> {
+  const bool AllowPartialUnrolling;
+  const int OptLevel;
+
+  explicit LoopUnrollPass(bool AllowPartialUnrolling, int OptLevel)
+      : AllowPartialUnrolling(AllowPartialUnrolling), OptLevel(OptLevel) {}
+
+public:
+  /// Create an instance of the loop unroll pass that will support both full
+  /// and partial unrolling.
+  ///
+  /// This uses the target information (or flags) to control the thresholds for
+  /// different unrolling stategies but supports all of them.
+  static LoopUnrollPass create(int OptLevel = 2) {
+    return LoopUnrollPass(/*AllowPartialUnrolling*/ true, OptLevel);
+  }
+
+  /// Create an instance of the loop unroll pass that only does full loop
+  /// unrolling.
+  ///
+  /// This will disable any runtime or partial unrolling.
+  static LoopUnrollPass createFull(int OptLevel = 2) {
+    return LoopUnrollPass(/*AllowPartialUnrolling*/ false, OptLevel);
+  }
 
   PreservedAnalyses run(Loop &L, LoopAnalysisManager &AM,
                         LoopStandardAnalysisResults &AR, LPMUpdater &U);