[Hexagon] Implement RDF-based post-RA optimizations

[oota-llvm.git] / lib / Target / Hexagon / HexagonTargetMachine.cpp

diff --git a/lib/Target/Hexagon/HexagonTargetMachine.cpp b/lib/Target/Hexagon/HexagonTargetMachine.cpp
index 9dccd696c9897faeea194f881708e89ea7a2a8bf..34b03fb74cef13aa16ccc9905190c0ef0c4f6a2f 100644 (file)
--- a/lib/Target/Hexagon/HexagonTargetMachine.cpp
+++ b/lib/Target/Hexagon/HexagonTargetMachine.cpp
@@ -26,7 +26,11 @@
 
 using namespace llvm;
 
-static cl:: opt<bool> DisableHardwareLoops("disable-hexagon-hwloops",
+
+static cl::opt<bool> EnableRDFOpt("rdf-opt", cl::Hidden, cl::ZeroOrMore,
+  cl::init(true), cl::desc("Enable RDF-based optimizations"));
+
+static cl::opt<bool> DisableHardwareLoops("disable-hexagon-hwloops",
   cl::Hidden, cl::desc("Disable Hardware Loops for Hexagon target"));
 
 static cl::opt<bool> DisableHexagonCFGOpt("disable-hexagon-cfgopt",
@@ -111,6 +115,7 @@ namespace llvm {
   FunctionPass *createHexagonOptimizeSZextends();
   FunctionPass *createHexagonPacketizer();
   FunctionPass *createHexagonPeephole();
+  FunctionPass *createHexagonRDFOpt();
   FunctionPass *createHexagonSplitConst32AndConst64();
   FunctionPass *createHexagonSplitDoubleRegs();
   FunctionPass *createHexagonStoreWidening();
@@ -262,9 +267,12 @@ void HexagonPassConfig::addPreRegAlloc() {
 }
 
 void HexagonPassConfig::addPostRegAlloc() {
-  if (getOptLevel() != CodeGenOpt::None)
+  if (getOptLevel() != CodeGenOpt::None) {
+    if (EnableRDFOpt)
+      addPass(createHexagonRDFOpt());
     if (!DisableHexagonCFGOpt)
       addPass(createHexagonCFGOptimizer(), false);
+  }
 }
 
 void HexagonPassConfig::addPreSched2() {