[LLVM][NFC] Move PassPlugin from Passes to separate library

This avoid pulling in the entire Passes library with all passes as
dependencies when just referring to PassPlugin, which is in fact
independent of the Passes themselves.

Pull Request: #173279

Author: aengelke

clang/lib/CodeGen/BackendUtil.cpp

@@ -41,8 +41,8 @@
 #include "llvm/MC/TargetRegistry.h"
 #include "llvm/Object/OffloadBinary.h"
 #include "llvm/Passes/PassBuilder.h"
-#include "llvm/Passes/PassPlugin.h"
 #include "llvm/Passes/StandardInstrumentations.h"
+#include "llvm/Plugins/PassPlugin.h"
 #include "llvm/ProfileData/InstrProfCorrelator.h"
 #include "llvm/Support/BuryPointer.h"
 #include "llvm/Support/CommandLine.h"

clang/lib/CodeGen/CMakeLists.txt

@@ -25,6 +25,7 @@ set(LLVM_LINK_COMPONENTS
   ObjCARCOpts
   Object
   Passes
+  Plugins
   ProfileData
   ScalarOpts
   Support

clang/tools/clang-linker-wrapper/CMakeLists.txt

@@ -8,6 +8,7 @@ set(LLVM_LINK_COMPONENTS
   TransformUtils
   Analysis
   Passes
+  Plugins
   IRReader
   Object
   Option

clang/tools/clang-linker-wrapper/ClangLinkerWrapper.cpp

@@ -38,7 +38,7 @@
 #include "llvm/Option/ArgList.h"
 #include "llvm/Option/OptTable.h"
 #include "llvm/Option/Option.h"
-#include "llvm/Passes/PassPlugin.h"
+#include "llvm/Plugins/PassPlugin.h"
 #include "llvm/Remarks/HotnessThresholdParser.h"
 #include "llvm/Support/CommandLine.h"
 #include "llvm/Support/Errc.h"

flang/lib/Frontend/CMakeLists.txt

@@ -46,6 +46,7 @@ add_flang_library(flangFrontend
 
   LINK_COMPONENTS
   Passes
+  Plugins
   Analysis
   BitReader
   Extensions

flang/lib/Frontend/FrontendActions.cpp

@@ -55,8 +55,8 @@
 #include "llvm/Linker/Linker.h"
 #include "llvm/Object/OffloadBinary.h"
 #include "llvm/Passes/PassBuilder.h"
-#include "llvm/Passes/PassPlugin.h"
 #include "llvm/Passes/StandardInstrumentations.h"
+#include "llvm/Plugins/PassPlugin.h"
 #include "llvm/ProfileData/InstrProfCorrelator.h"
 #include "llvm/Support/AMDGPUAddrSpace.h"
 #include "llvm/Support/Error.h"

llvm/examples/Bye/Bye.cpp

@@ -2,7 +2,7 @@
 #include "llvm/IR/LegacyPassManager.h"
 #include "llvm/Pass.h"
 #include "llvm/Passes/PassBuilder.h"
-#include "llvm/Passes/PassPlugin.h"
+#include "llvm/Plugins/PassPlugin.h"
 #include "llvm/Support/CommandLine.h"
 #include "llvm/Support/raw_ostream.h"
 

llvm/examples/IRTransforms/SimplifyCFG.cpp

@@ -38,7 +38,7 @@
 #include "llvm/IR/PassManager.h"
 #include "llvm/IR/PatternMatch.h"
 #include "llvm/Passes/PassBuilder.h"
-#include "llvm/Passes/PassPlugin.h"
+#include "llvm/Plugins/PassPlugin.h"
 #include "llvm/Support/CommandLine.h"
 
 using namespace llvm;

llvm/include/llvm/Passes/PassPlugin.h llvm/include/llvm/Plugins/PassPlugin.hllvm/include/llvm/Passes/PassPlugin.h renamed to llvm/include/llvm/Plugins/PassPlugin.h

@@ -1,4 +1,4 @@
-//===- llvm/Passes/PassPlugin.h - Public Plugin API -----------------------===//
+//===----------------------------------------------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 // See https://llvm.org/LICENSE.txt for license information.
@@ -10,8 +10,8 @@
 //
 //===----------------------------------------------------------------------===//
 
-#ifndef LLVM_PASSES_PASSPLUGIN_H
-#define LLVM_PASSES_PASSPLUGIN_H
+#ifndef LLVM_PLUGINS_PASSPLUGIN_H
+#define LLVM_PLUGINS_PASSPLUGIN_H
 
 #include "llvm/ADT/StringRef.h"
 #include "llvm/Support/CodeGen.h"
@@ -112,7 +112,7 @@ class PassPlugin {
   sys::DynamicLibrary Library;
   PassPluginLibraryInfo Info;
 };
-}
+} // namespace llvm
 
 // The function returns a struct with default initializers.
 #ifdef __clang__
@@ -139,4 +139,4 @@ llvmGetPassPluginInfo();
 #pragma clang diagnostic pop
 #endif
 
-#endif /* LLVM_PASSES_PASSPLUGIN_H */
+#endif /* LLVM_PLUGINS_PASSPLUGIN_H */

llvm/lib/CMakeLists.txt

@@ -41,6 +41,7 @@ add_subdirectory(AsmParser)
 add_subdirectory(LineEditor)
 add_subdirectory(ProfileData)
 add_subdirectory(Passes)
+add_subdirectory(Plugins)
 add_subdirectory(TargetParser)
 add_subdirectory(TextAPI)
 add_subdirectory(Telemetry)