[NewPM] Don't error when there's an unrecognized pass name

This currently blocks --print-before/after with a legacy PM pass, for
example when we use the new PM for the optimization pipeline but the
legacy PM for the codegen pipeline. Also in the future when the codegen
pipeline works with the new PM there will be multiple places to specify
passes, so even when everything is using the new PM, there will still be
multiple places that can accept different pass names.

Reviewed By: hoy, ychen

Differential Revision: https://reviews.llvm.org/D94283

Author: aeubanks

llvm/include/llvm/IR/PassInstrumentation.h

@@ -127,8 +127,6 @@ class PassInstrumentationCallbacks {
   void addClassToPassName(StringRef ClassName, StringRef PassName);
   /// Get the pass name for a given pass class name.
   StringRef getPassNameForClassName(StringRef ClassName);
-  /// Whether or not the class to pass name map contains the pass name.
-  bool hasPassName(StringRef PassName);
 
 private:
   friend class PassInstrumentation;

llvm/lib/IR/PassInstrumentation.cpp

@@ -22,14 +22,6 @@ void PassInstrumentationCallbacks::addClassToPassName(StringRef ClassName,
   ClassToPassName[ClassName] = PassName.str();
 }
 
-bool PassInstrumentationCallbacks::hasPassName(StringRef PassName) {
-  for (const auto &E : ClassToPassName) {
-    if (E.getValue() == PassName)
-      return true;
-  }
-  return false;
-}
-
 StringRef
 PassInstrumentationCallbacks::getPassNameForClassName(StringRef ClassName) {
   return ClassToPassName[ClassName];

llvm/lib/Passes/PassBuilder.cpp

@@ -459,14 +459,6 @@ PassBuilder::PassBuilder(bool DebugLogging, TargetMachine *TM,
 #define CGSCC_ANALYSIS(NAME, CREATE_PASS)                                      \
   PIC->addClassToPassName(decltype(CREATE_PASS)::name(), NAME);
 #include "PassRegistry.def"
-    for (const auto &P : printBeforePasses()) {
-      if (!PIC->hasPassName(P))
-        report_fatal_error("unrecognized pass name: " + P);
-    }
-    for (const auto &P : printAfterPasses()) {
-      if (!PIC->hasPassName(P))
-        report_fatal_error("unrecognized pass name: " + P);
-    }
   }
 }
 

llvm/test/Other/print-before-after.ll

@@ -1,5 +1,5 @@
-; RUN: not --crash opt < %s -disable-output -passes='no-op-module' -print-before=bleh 2>&1 | FileCheck %s --check-prefix=NONE --allow-empty
-; RUN: not --crash opt < %s -disable-output -passes='no-op-module' -print-after=bleh 2>&1 | FileCheck %s --check-prefix=NONE --allow-empty
+; RUN: opt < %s -disable-output -passes='no-op-module' -print-before=bleh 2>&1 | FileCheck %s --check-prefix=NONE --allow-empty
+; RUN: opt < %s -disable-output -passes='no-op-module' -print-after=bleh 2>&1 | FileCheck %s --check-prefix=NONE --allow-empty
 ; RUN: opt < %s -disable-output -passes='no-op-module' -print-before=no-op-function 2>&1 | FileCheck %s --check-prefix=NONE --allow-empty
 ; RUN: opt < %s -disable-output -passes='no-op-module' -print-after=no-op-function 2>&1 | FileCheck %s --check-prefix=NONE --allow-empty
 ; RUN: opt < %s -disable-output -passes='no-op-module,no-op-function' -print-before=no-op-module 2>&1 | FileCheck %s --check-prefix=ONCE