use X86PassRegistry

Author: paperchalice

llvm/lib/Target/X86/X86CodeGenPassBuilder.cpp

@@ -53,8 +53,22 @@ void X86TargetMachine::registerPassBuilderCallbacks(
     PassBuilder &PB, bool PopulateClassToPassNames) {
   if (PopulateClassToPassNames) {
     auto *PIC = PB.getPassInstrumentationCallbacks();
-    PIC->addClassToPassName(X86ISelDAGToDAGPass::name(), "x86-isel");
+#define MACHINE_FUNCTION_PASS(NAME, CREATE_PASS)                               \
+  PIC->addClassToPassName(decltype(CREATE_PASS)::name(), NAME);
+#include "X86PassRegistry.def"
   }
+
+  PB.registerPipelineParsingCallback(
+      [this](StringRef Name, MachineFunctionPassManager &MFPM,
+             ArrayRef<PassBuilder::PipelineElement>) {
+#define MACHINE_FUNCTION_PASS(NAME, CREATE_PASS)                               \
+  if (Name == NAME) {                                                          \
+    MFPM.addPass(CREATE_PASS);                                                 \
+    return true;                                                               \
+  }
+#include "X86PassRegistry.def"
+        return false;
+      });
 }
 
 Error X86TargetMachine::buildCodeGenPipeline(

llvm/lib/Target/X86/X86PassRegistry.def

@@ -0,0 +1,19 @@
+//===- X86PassRegistry.def - Registry of X86 specific passes ----*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This file is used as the registry of passes that are part of the X86 backend.
+//
+//===----------------------------------------------------------------------===//
+
+// NOTE: NO INCLUDE GUARD DESIRED!
+
+#ifndef MACHINE_FUNCTION_PASS
+#define MACHINE_FUNCTION_PASS(NAME, CREATE_PASS)
+#endif
+MACHINE_FUNCTION_PASS(X86ISelDAGToDAGPass, X86ISelDAGToDAGPass(*this))
+#undef MACHINE_FUNCTION_PASS