[X86] Set up the framework for optimization of CCMP/CTEST

SPEC: https://cdrdv2.intel.com/v1/dl/getContent/784266

Blog: https://kanrobert.github.io/rfc/All-about-APX-conditional-ISA

Author: KanRobert

llvm/lib/Target/X86/CMakeLists.txt

@@ -30,6 +30,7 @@ set(sources
   X86CallingConv.cpp
   X86CmovConversion.cpp
   X86CodeGenPassBuilder.cpp
+  X86ConditionalCompares.cpp
   X86DomainReassignment.cpp
   X86DiscriminateMemOps.cpp
   X86LowerTileCopy.cpp

llvm/lib/Target/X86/X86.h

@@ -157,6 +157,9 @@ FunctionPass *createX86InsertX87waitPass();
 /// ways.
 FunctionPass *createX86PartialReductionPass();
 
+/// This pass performs CCMP optimization.
+FunctionPass *createX86ConditionalCompares();
+
 InstructionSelector *createX86InstructionSelector(const X86TargetMachine &TM,
                                                   X86Subtarget &,
                                                   X86RegisterBankInfo &);
@@ -194,6 +197,7 @@ void initializeX86LowerAMXTypeLegacyPassPass(PassRegistry &);
 void initializeX86LowerTileCopyPass(PassRegistry &);
 void initializeX86OptimizeLEAPassPass(PassRegistry &);
 void initializeX86PartialReductionPass(PassRegistry &);
+void initializeX86ConditionalComparesPass(PassRegistry &);
 void initializeX86PreTileConfigPass(PassRegistry &);
 void initializeX86ReturnThunksPass(PassRegistry &);
 void initializeX86SpeculativeExecutionSideEffectSuppressionPass(PassRegistry &);