vendor/llvm-project/llvmorg-13-init-16847-g88e66fa60ae5vendor/llvm-project/llvmorg-12.0.1-rc2-0-ge7dac564cd0evendor/llvm-project/llvmorg-12.0.1-0-gfed41342a82f

1 files changed, 16 insertions, 0 deletions

diff --git a/llvm/lib/Analysis/BlockFrequencyInfoImpl.cpp b/llvm/lib/Analysis/BlockFrequencyInfoImpl.cpp
index e4fda2472b3a..e4e45b3076be 100644
--- a/llvm/lib/Analysis/BlockFrequencyInfoImpl.cpp
+++ b/llvm/lib/Analysis/BlockFrequencyInfoImpl.cpp
@@ -40,12 +40,28 @@ using namespace llvm::bfi_detail;
 
 #define DEBUG_TYPE "block-freq"
 
+namespace llvm {
 cl::opt<bool> CheckBFIUnknownBlockQueries(
     "check-bfi-unknown-block-queries",
     cl::init(false), cl::Hidden,
     cl::desc("Check if block frequency is queried for an unknown block "
              "for debugging missed BFI updates"));
 
+cl::opt<bool> UseIterativeBFIInference(
+    "use-iterative-bfi-inference", cl::init(false), cl::Hidden, cl::ZeroOrMore,
+    cl::desc("Apply an iterative post-processing to infer correct BFI counts"));
+
+cl::opt<unsigned> IterativeBFIMaxIterationsPerBlock(
+    "iterative-bfi-max-iterations-per-block", cl::init(1000), cl::Hidden,
+    cl::desc("Iterative inference: maximum number of update iterations "
+             "per block"));
+
+cl::opt<double> IterativeBFIPrecision(
+    "iterative-bfi-precision", cl::init(1e-12), cl::Hidden,
+    cl::desc("Iterative inference: delta convergence precision; smaller values "
+             "typically lead to better results at the cost of worsen runtime"));
+}
+
 ScaledNumber<uint64_t> BlockMass::toScaled() const {
   if (isFull())
     return ScaledNumber<uint64_t>(1, 0);