X86: Register the X86CallFrameOptimization pass

Summary:
The motivation of this change is to enable .mir testing for this pass.
Added one test case to cover the functionality, this same case will be improved by
a future patch.

Reviewers: igorb, guyblank, DavidKreitzer

Reviewed By: guyblank, DavidKreitzer

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D38729

llvm-svn: 316412

2 files changed, 15 insertions, 4 deletions

diff --git a/llvm/lib/Target/X86/X86CallFrameOptimization.cpp b/llvm/lib/Target/X86/X86CallFrameOptimization.cpp
index 765af67de16..c6022f082c8 100644
--- a/llvm/lib/Target/X86/X86CallFrameOptimization.cpp
+++ b/llvm/lib/Target/X86/X86CallFrameOptimization.cpp
@@ -56,14 +56,23 @@ static cl::opt<bool>
                cl::desc("Avoid optimizing x86 call frames for size"),
                cl::init(false), cl::Hidden);
 
+namespace llvm {
+void initializeX86CallFrameOptimizationPass(PassRegistry &);
+}
+
 namespace {
 
 class X86CallFrameOptimization : public MachineFunctionPass {
 public:
-  X86CallFrameOptimization() : MachineFunctionPass(ID) {}
+  X86CallFrameOptimization() : MachineFunctionPass(ID) {
+    initializeX86CallFrameOptimizationPass(
+        *PassRegistry::getPassRegistry());
+  }
 
   bool runOnMachineFunction(MachineFunction &MF) override;
 
+  static char ID;
+
 private:
   // Information we know about a particular call site
   struct CallContext {
@@ -120,12 +129,12 @@ private:
   MachineRegisterInfo *MRI;
   unsigned SlotSize;
   unsigned Log2SlotSize;
-  static char ID;
 };
 
-char X86CallFrameOptimization::ID = 0;
-
 } // end anonymous namespace
+char X86CallFrameOptimization::ID = 0;
+INITIALIZE_PASS(X86CallFrameOptimization, DEBUG_TYPE,
+                "X86 Call Frame Optimization", false, false)
 
 // This checks whether the transformation is legal.
 // Also returns false in cases where it's potentially legal, but
diff --git a/llvm/lib/Target/X86/X86TargetMachine.cpp b/llvm/lib/Target/X86/X86TargetMachine.cpp
index 1c5f2a2a61a..6e6c724eb0a 100644
--- a/llvm/lib/Target/X86/X86TargetMachine.cpp
+++ b/llvm/lib/Target/X86/X86TargetMachine.cpp
@@ -58,6 +58,7 @@ namespace llvm {
 
 void initializeWinEHStatePassPass(PassRegistry &);
 void initializeFixupLEAPassPass(PassRegistry &);
+void initializeX86CallFrameOptimizationPass(PassRegistry &);
 void initializeX86CmovConverterPassPass(PassRegistry &);
 void initializeX86ExecutionDepsFixPass(PassRegistry &);
 void initializeX86DomainReassignmentPass(PassRegistry &);
@@ -75,6 +76,7 @@ extern "C" void LLVMInitializeX86Target() {
   initializeFixupBWInstPassPass(PR);
   initializeEvexToVexInstPassPass(PR);
   initializeFixupLEAPassPass(PR);
+  initializeX86CallFrameOptimizationPass(PR);
   initializeX86CmovConverterPassPass(PR);
   initializeX86ExecutionDepsFixPass(PR);
   initializeX86DomainReassignmentPass(PR);