[PassManagerBuilder] Remove PassManagerBuilder

PassManagerBuilder is dead, long live PassBuilder!

bugpoint's -O# are now useless (and probably have been for a while given the number of passes we've removed from PassManagerBuilder). Perhaps they'll be revived if bugpoint ever works with the new PM.

Reviewed By: nikic, MaskRay

Differential Revision: https://reviews.llvm.org/D145835

Author: aeubanks

llvm/docs/WritingAnLLVMPass.rst

@@ -194,7 +194,6 @@ As a whole, the ``.cpp`` file looks like:
   #include "llvm/Support/raw_ostream.h"
 
   #include "llvm/IR/LegacyPassManager.h"
-  #include "llvm/Transforms/IPO/PassManagerBuilder.h"
 
   using namespace llvm;
 

llvm/include/llvm/Transforms/IPO/PassManagerBuilder.h

@@ -31,7 +31,6 @@ add_llvm_component_library(LLVMipo
   ModuleInliner.cpp
   OpenMPOpt.cpp
   PartialInlining.cpp
-  PassManagerBuilder.cpp
   SampleContextTracker.cpp
   SampleProfile.cpp
   SampleProfileProbe.cpp

llvm/lib/Transforms/IPO/CMakeLists.txt

@@ -30,7 +30,6 @@
 #include "llvm/Support/TargetSelect.h"
 #include "llvm/Support/Valgrind.h"
 #include "llvm/Transforms/IPO/AlwaysInliner.h"
-#include "llvm/Transforms/IPO/PassManagerBuilder.h"
 
 // Enable this macro to debug bugpoint itself.
 //#define DEBUG_BUGPOINT 1
@@ -66,24 +65,6 @@ static cl::opt<bool>
 static cl::list<const PassInfo *, bool, PassNameParser>
     PassList(cl::desc("Passes available:"));
 
-static cl::opt<bool>
-    OptLevelO1("O1", cl::desc("Optimization level 1. Identical to 'opt -O1'"));
-
-static cl::opt<bool>
-    OptLevelO2("O2", cl::desc("Optimization level 2. Identical to 'opt -O2'"));
-
-static cl::opt<bool> OptLevelOs(
-    "Os",
-    cl::desc(
-        "Like -O2 with extra optimizations for size. Similar to clang -Os"));
-
-static cl::opt<bool>
-OptLevelOz("Oz",
-           cl::desc("Like -Os but reduces code size further. Similar to clang -Oz"));
-
-static cl::opt<bool>
-    OptLevelO3("O3", cl::desc("Optimization level 3. Identical to 'opt -O3'"));
-
 static cl::opt<std::string>
     OverrideTriple("mtriple", cl::desc("Override target triple for module"));
 
@@ -110,23 +91,6 @@ class AddToDriver : public legacy::FunctionPassManager {
 };
 }
 
-// This routine adds optimization passes based on selected optimization level,
-// OptLevel.
-//
-// OptLevel - Optimization Level
-static void AddOptimizationPasses(legacy::FunctionPassManager &FPM,
-                                  unsigned OptLevel,
-                                  unsigned SizeLevel) {
-  PassManagerBuilder Builder;
-  Builder.OptLevel = OptLevel;
-  Builder.SizeLevel = SizeLevel;
-
-  Builder.Inliner = createAlwaysInlinerLegacyPass();
-
-  Builder.populateFunctionPassManager(FPM);
-  Builder.populateModulePassManager(FPM);
-}
-
 #define HANDLE_EXTENSION(Ext)                                                  \
   llvm::PassPluginLibraryInfo get##Ext##PluginInfo();
 #include "llvm/Support/Extension.def"
@@ -192,17 +156,6 @@ int main(int argc, char **argv) {
 
   AddToDriver PM(D);
 
-  if (OptLevelO1)
-    AddOptimizationPasses(PM, 1, 0);
-  else if (OptLevelO2)
-    AddOptimizationPasses(PM, 2, 0);
-  else if (OptLevelO3)
-    AddOptimizationPasses(PM, 3, 0);
-  else if (OptLevelOs)
-    AddOptimizationPasses(PM, 2, 1);
-  else if (OptLevelOz)
-    AddOptimizationPasses(PM, 2, 2);
-
   for (const PassInfo *PI : PassList)
     D.addPass(std::string(PI->getPassArgument()));
 

llvm/lib/Transforms/IPO/PassManagerBuilder.cpp

@@ -52,7 +52,6 @@ static_library("IPO") {
     "ModuleInliner.cpp",
     "OpenMPOpt.cpp",
     "PartialInlining.cpp",
-    "PassManagerBuilder.cpp",
     "SCCP.cpp",
     "SampleContextTracker.cpp",
     "SampleProfile.cpp",

llvm/tools/bugpoint/bugpoint.cpp

@@ -48,7 +48,6 @@
 #include "llvm/Support/CommandLine.h"
 #include "llvm/Support/TargetSelect.h"
 #include "llvm/Transforms/IPO.h"
-#include "llvm/Transforms/IPO/PassManagerBuilder.h"
 
 namespace cl = llvm::cl;