X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FTarget%2FARM%2FA15SDOptimizer.cpp;h=7a1865ce5fd6bbdd66e1a73e7886ed0659eb0b12;hb=9c6cd879346afe6bc0e29e117393158fd89f5feb;hp=387f1f64e83651f9cb32251bb99d797d1576479c;hpb=9accb108553cb895f4dbb1144e23a010a4ab338d;p=oota-llvm.git

diff --git a/lib/Target/ARM/A15SDOptimizer.cpp b/lib/Target/ARM/A15SDOptimizer.cpp
index 387f1f64e83..7a1865ce5fd 100644
--- a/lib/Target/ARM/A15SDOptimizer.cpp
+++ b/lib/Target/ARM/A15SDOptimizer.cpp
@@ -27,12 +27,15 @@
 #include "ARM.h"
 #include "ARMBaseInstrInfo.h"
 #include "ARMBaseRegisterInfo.h"
+#include "ARMSubtarget.h"
 #include "llvm/ADT/Statistic.h"
+#include "llvm/CodeGen/MachineFunction.h"
 #include "llvm/CodeGen/MachineFunctionPass.h"
 #include "llvm/CodeGen/MachineInstr.h"
 #include "llvm/CodeGen/MachineInstrBuilder.h"
 #include "llvm/CodeGen/MachineRegisterInfo.h"
 #include "llvm/Support/Debug.h"
+#include "llvm/Support/raw_ostream.h"
 #include "llvm/Target/TargetRegisterInfo.h"
 #include "llvm/Target/TargetSubtargetInfo.h"
 #include <map>
@@ -678,8 +681,13 @@ bool A15SDOptimizer::runOnInstruction(MachineInstr *MI) {
 }
 
 bool A15SDOptimizer::runOnMachineFunction(MachineFunction &Fn) {
-  TII = static_cast<const ARMBaseInstrInfo *>(Fn.getSubtarget().getInstrInfo());
-  TRI = Fn.getSubtarget().getRegisterInfo();
+  const ARMSubtarget &STI = Fn.getSubtarget<ARMSubtarget>();
+  // Since the A15SDOptimizer pass can insert VDUP instructions, it can only be
+  // enabled when NEON is available.
+  if (!(STI.isCortexA15() && STI.hasNEON()))
+    return false;
+  TII = STI.getInstrInfo();
+  TRI = STI.getRegisterInfo();
   MRI = &Fn.getRegInfo();
   bool Modified = false;