Hexagon constant extender support.

Patch by Jyotsna Verma.

llvm-svn: 156634

1 files changed, 7 insertions, 0 deletions

diff --git a/llvm/lib/Target/Hexagon/HexagonTargetMachine.cpp b/llvm/lib/Target/Hexagon/HexagonTargetMachine.cpp
index 8af95a9c206..cad14739834 100644
--- a/llvm/lib/Target/Hexagon/HexagonTargetMachine.cpp
+++ b/llvm/lib/Target/Hexagon/HexagonTargetMachine.cpp
@@ -28,6 +28,10 @@ static cl::
 opt<bool> DisableHardwareLoops(
                         "disable-hexagon-hwloops", cl::Hidden,
                         cl::desc("Disable Hardware Loops for Hexagon target"));
+static cl::
+opt<bool> DisableCExtOpt(
+                        "disable-hexagon-cextopt", cl::Hidden,
+                        cl::desc("Disable Optimization of Constant Extenders"));
 
 /// HexagonTargetMachineModule - Note that this is used on hosts that
 /// cannot link in a library unless there are references into the
@@ -110,6 +114,9 @@ bool HexagonPassConfig::addInstSelector() {
 
 
 bool HexagonPassConfig::addPreRegAlloc() {
+  if (!DisableCExtOpt) {
+    PM->add(createHexagonOptimizeConstExt(getHexagonTargetMachine()));
+  }
   if (!DisableHardwareLoops) {
     PM->add(createHexagonHardwareLoops());
   }