commit 167d918225ecd05a63f6b8d449c317feda741e18
author Krzysztof Parzyszek <kparzysz@codeaurora.org> Thu Jul 28 20:01:59 2016 +0000
committer Krzysztof Parzyszek <kparzysz@codeaurora.org> Thu Jul 28 20:01:59 2016 +0000
tree 6d6b407bbff90a3ad7567398edab734cf2c60926
parent b7c72717c92e3d7260bfe8aebc110971b32bf097

[Hexagon] Implement MI-level constant propagation

llvm-svn: 277028

llvm/lib/Target/Hexagon/HexagonTargetMachine.cpp

diff --git a/llvm/lib/Target/Hexagon/HexagonTargetMachine.cpp b/llvm/lib/Target/Hexagon/HexagonTargetMachine.cpp
index 2c971b1..80f256c 100644
--- a/llvm/lib/Target/Hexagon/HexagonTargetMachine.cpp
+++ b/llvm/lib/Target/Hexagon/HexagonTargetMachine.cpp
@@ -42,6 +42,9 @@
   cl::Hidden, cl::ZeroOrMore, cl::init(false),
   cl::desc("Disable Hexagon CFG Optimization"));
 
+static cl::opt<bool> DisableHCP("disable-hcp", cl::init(false), cl::Hidden,
+  cl::ZeroOrMore, cl::desc("Disable Hexagon constant propagation"));
+
 static cl::opt<bool> DisableStoreWidening("disable-store-widen",
   cl::Hidden, cl::init(false), cl::desc("Disable store widening"));
 
@@ -111,6 +114,7 @@
   FunctionPass *createHexagonCallFrameInformation();
   FunctionPass *createHexagonCFGOptimizer();
   FunctionPass *createHexagonCommonGEP();
+  FunctionPass *createHexagonConstPropagationPass();
   FunctionPass *createHexagonCopyToCombine();
   FunctionPass *createHexagonEarlyIfConversion();
   FunctionPass *createHexagonExpandCondsets();
@@ -263,6 +267,11 @@
       addPass(createHexagonBitSimplify(), false);
     addPass(createHexagonPeephole());
     printAndVerify("After hexagon peephole pass");
+    // Constant propagation.
+    if (!DisableHCP) {
+      addPass(createHexagonConstPropagationPass(), false);
+      addPass(&UnreachableMachineBlockElimID, false);
+    }
     if (EnableGenInsert)
       addPass(createHexagonGenInsert(), false);
     if (EnableEarlyIf)