Fix a use of uninitialized value. OldCC is set when IsCmpZero || IsSwapped and read...

[oota-llvm.git] / lib / Target / X86 / X86Subtarget.cpp

diff --git a/lib/Target/X86/X86Subtarget.cpp b/lib/Target/X86/X86Subtarget.cpp
index b94bd712ff72c1fab903c4e9f3453a47c0f7335b..989e0d61b6fcdfd66443731ea8d70a5b074a9523 100644 (file)
--- a/lib/Target/X86/X86Subtarget.cpp
+++ b/lib/Target/X86/X86Subtarget.cpp
@@ -16,6 +16,7 @@
 #include "llvm/IR/Attributes.h"
 #include "llvm/IR/Function.h"
 #include "llvm/IR/GlobalValue.h"
+#include "llvm/Support/CommandLine.h"
 #include "llvm/Support/Debug.h"
 #include "llvm/Support/ErrorHandling.h"
 #include "llvm/Support/Host.h"
@@ -35,6 +36,13 @@ using namespace llvm;
 #define GET_SUBTARGETINFO_CTOR
 #include "X86GenSubtargetInfo.inc"
 
+// Temporary option to control early if-conversion for x86 while adding machine
+// models.
+static cl::opt<bool>
+X86EarlyIfConv("x86-early-ifcvt", cl::Hidden,
+               cl::desc("Enable early if-conversion on X86"));
+
+
 /// ClassifyBlockAddressReference - Classify a blockaddress reference for the
 /// current subtarget according to how we should reference it in a non-pcrel
 /// context.
@@ -310,3 +318,8 @@ X86Subtarget::enablePostRAScheduler(CodeGenOpt::Level OptLevel,
   CriticalPathRCs.clear();
   return PostRAScheduler && OptLevel >= CodeGenOpt::Default;
 }
+
+bool
+X86Subtarget::enableEarlyIfConversion() const {
+  return hasCMov() && X86EarlyIfConv;
+}