[x86,SDAG] Sink the logic for folding shuffles of splats more

[oota-llvm.git] / lib / CodeGen / EarlyIfConversion.cpp

diff --git a/lib/CodeGen/EarlyIfConversion.cpp b/lib/CodeGen/EarlyIfConversion.cpp
index 40059be0fdc0cf929ea91962afbb61b79d6bb978..c4706328ea52c35c3eda04d3fc85269a1aa3b44b 100644 (file)
--- a/lib/CodeGen/EarlyIfConversion.cpp
+++ b/lib/CodeGen/EarlyIfConversion.cpp
@@ -16,7 +16,6 @@
 //
 //===----------------------------------------------------------------------===//
 
-#define DEBUG_TYPE "early-ifcvt"
 #include "llvm/ADT/BitVector.h"
 #include "llvm/ADT/PostOrderIterator.h"
 #include "llvm/ADT/SetVector.h"
@@ -40,6 +39,8 @@
 
 using namespace llvm;
 
+#define DEBUG_TYPE "early-ifcvt"
+
 // Absolute maximum number of instructions allowed per speculated block.
 // This bypasses all other heuristics, so it should be set fairly high.
 static cl::opt<unsigned>
@@ -775,6 +776,12 @@ bool EarlyIfConverter::tryConvertIf(MachineBasicBlock *MBB) {
 bool EarlyIfConverter::runOnMachineFunction(MachineFunction &MF) {
   DEBUG(dbgs() << "********** EARLY IF-CONVERSION **********\n"
                << "********** Function: " << MF.getName() << '\n');
+  // Only run if conversion if the target wants it.
+  if (!MF.getTarget()
+           .getSubtarget<TargetSubtargetInfo>()
+           .enableEarlyIfConversion())
+    return false;
+
   TII = MF.getTarget().getInstrInfo();
   TRI = MF.getTarget().getRegisterInfo();
   SchedModel =