Revert "[LLVM] Add IRNormalizer Pass" (#113392)

Reverts #68176 Introduced BuildBot failure: #68176 (comment)
llvm · Oct 22, 2024 · 8a12e01 · 8a12e01
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diff --git a/llvm/docs/Passes.rst b/llvm/docs/Passes.rst
@@ -543,14 +543,6 @@ variables with initializers are marked as internal.
 An interprocedural variant of :ref:`Sparse Conditional Constant Propagation
 <passes-sccp>`.
 
-``ir-normalizer``: Transforms IR into a normal form that's easier to diff
-----------------------------------------------------------------------------
-
-This pass aims to transform LLVM Modules into a normal form by reordering and
-renaming instructions while preserving the same semantics. The normalizer makes
-it easier to spot semantic differences while diffing two modules which have
-undergone two different passes.
-
 ``jump-threading``: Jump Threading
 ----------------------------------
 

diff --git a/llvm/docs/ReleaseNotes.md b/llvm/docs/ReleaseNotes.md
@@ -42,11 +42,6 @@ point (e.g. maybe you would like to give an example of the
 functionality, or simply have a lot to talk about), see the comment below
 for adding a new subsection. -->
 
-* Added a new IRNormalizer pass which aims to transform LLVM modules into
-  a normal form by reordering and renaming instructions while preserving the
-  same semantics. The normalizer makes it easier to spot semantic differences
-  when diffing two modules which have undergone different passes.
-
 * ...
 
 <!-- If you would like to document a larger change, then you can add a

diff --git a/llvm/include/llvm/Transforms/Utils/IRNormalizer.h b/llvm/include/llvm/Transforms/Utils/IRNormalizer.h
diff --git a/llvm/lib/Passes/PassBuilder.cpp b/llvm/lib/Passes/PassBuilder.cpp
@@ -303,7 +303,6 @@
 #include "llvm/Transforms/Utils/EntryExitInstrumenter.h"
 #include "llvm/Transforms/Utils/FixIrreducible.h"
 #include "llvm/Transforms/Utils/HelloWorld.h"
-#include "llvm/Transforms/Utils/IRNormalizer.h"
 #include "llvm/Transforms/Utils/InjectTLIMappings.h"
 #include "llvm/Transforms/Utils/InstructionNamer.h"
 #include "llvm/Transforms/Utils/Instrumentation.h"

diff --git a/llvm/lib/Passes/PassRegistry.def b/llvm/lib/Passes/PassRegistry.def
@@ -412,7 +412,6 @@ FUNCTION_PASS("move-auto-init", MoveAutoInitPass())
 FUNCTION_PASS("nary-reassociate", NaryReassociatePass())
 FUNCTION_PASS("newgvn", NewGVNPass())
 FUNCTION_PASS("no-op-function", NoOpFunctionPass())
-FUNCTION_PASS("normalize", IRNormalizerPass())
 FUNCTION_PASS("objc-arc", ObjCARCOptPass())
 FUNCTION_PASS("objc-arc-contract", ObjCARCContractPass())
 FUNCTION_PASS("objc-arc-expand", ObjCARCExpandPass())

diff --git a/llvm/lib/Transforms/Utils/CMakeLists.txt b/llvm/lib/Transforms/Utils/CMakeLists.txt
@@ -37,7 +37,6 @@ add_llvm_component_library(LLVMTransformUtils
   InstructionNamer.cpp
   Instrumentation.cpp
   IntegerDivision.cpp
-  IRNormalizer.cpp
   LCSSA.cpp
   LibCallsShrinkWrap.cpp
   Local.cpp