Make early if conversion dependent upon the subtarget and add

a subtarget hook to enable. Unconditionally add to the pass pipeline
for targets that might want to use it. No functional change.

llvm-svn: 209340

1 files changed, 8 insertions, 0 deletions

diff --git a/llvm/lib/Target/ARM64/ARM64Subtarget.cpp b/llvm/lib/Target/ARM64/ARM64Subtarget.cpp
index 528cfc97cbf..d81e21b51df 100644
--- a/llvm/lib/Target/ARM64/ARM64Subtarget.cpp
+++ b/llvm/lib/Target/ARM64/ARM64Subtarget.cpp
@@ -26,6 +26,10 @@ using namespace llvm;
 #define GET_SUBTARGETINFO_TARGET_DESC
 #include "ARM64GenSubtargetInfo.inc"
 
+static cl::opt<bool>
+EnableEarlyIfConvert("arm64-early-ifcvt", cl::desc("Enable the early if "
+                     "converter pass"), cl::init(true), cl::Hidden);
+
 ARM64Subtarget::ARM64Subtarget(const std::string &TT, const std::string &CPU,
                                const std::string &FS, bool LittleEndian)
     : ARM64GenSubtargetInfo(TT, CPU, FS), ARMProcFamily(Others),
@@ -105,3 +109,7 @@ void ARM64Subtarget::overrideSchedPolicy(MachineSchedPolicy &Policy,
   Policy.OnlyTopDown = false;
   Policy.OnlyBottomUp = false;
 }
+
+bool ARM64Subtarget::enableEarlyIfConversion() const override {
+  return EnableEarlyIfConvert;
+}