[NFC] Move FPBuiltinFnSelection pass to Transforms (#14339)

This moves the FPBuiltinFnSelection pass to the
llvm/lib/Transforms/Scalar directory. This is needed to enable future
changes that will run this pass as part of the main pipeline for device
compilation. With this pass in CodeGen, the slibs build would fail.

llvm/include/llvm/Passes/CodeGenPassBuilder.h

@@ -29,7 +29,6 @@
 #include "llvm/CodeGen/DwarfEHPrepare.h"
 #include "llvm/CodeGen/ExpandMemCmp.h"
 #include "llvm/CodeGen/ExpandReductions.h"
-#include "llvm/CodeGen/FPBuiltinFnSelection.h"
 #include "llvm/CodeGen/GCMetadata.h"
 #include "llvm/CodeGen/GlobalMerge.h"
 #include "llvm/CodeGen/IndirectBrExpand.h"
@@ -65,6 +64,7 @@
 #include "llvm/Target/TargetMachine.h"
 #include "llvm/Transforms/CFGuard.h"
 #include "llvm/Transforms/Scalar/ConstantHoisting.h"
+#include "llvm/Transforms/Scalar/FPBuiltinFnSelection.h"
 #include "llvm/Transforms/Scalar/LoopPassManager.h"
 #include "llvm/Transforms/Scalar/LoopStrengthReduce.h"
 #include "llvm/Transforms/Scalar/LowerConstantIntrinsics.h"

llvm/include/llvm/CodeGen/FPBuiltinFnSelection.h → llvm/include/llvm/Transforms/Scalar/FPBuiltinFnSelection.h

@@ -1,4 +1,4 @@
-//===- FPBuiltinFnSelection.h - Pre-ISel intrinsic lowering pass ----------===//
+//===- FPBuiltinFnSelection.h - fpbuiltin intrinsic lowering pass ---------===//
 //
 // 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 @@
 // llvm.fpbuiltin.* intrinsics.
 //
 //===----------------------------------------------------------------------===//
-#ifndef LLVM_CODEGEN_FPBUILTINFNSELECTION_H
-#define LLVM_CODEGEN_FPBUILTINFNSELECTION_H
+#ifndef LLVM_TRANSFORMS_SCALAR_FPBUILTINFNSELECTION_H
+#define LLVM_TRANSFORMS_SCALAR_FPBUILTINFNSELECTION_H
 
 #include "llvm/IR/PassManager.h"
 
@@ -25,4 +25,4 @@ struct FPBuiltinFnSelectionPass : PassInfoMixin<FPBuiltinFnSelectionPass> {
 
 } // end namespace llvm
 
-#endif // LLVM_CODEGEN_FPBUILTINFNSELECTION_H
+#endif // LLVM_TRANSFORMS_SCALAR_FPBUILTINFNSELECTION_H

llvm/lib/CodeGen/CMakeLists.txt

@@ -63,7 +63,6 @@ add_llvm_component_library(LLVMCodeGen
   ExpandVectorPredication.cpp
   FaultMaps.cpp
   FEntryInserter.cpp
-  FPBuiltinFnSelection.cpp
   FinalizeISel.cpp
   FixupStatepointCallerSaved.cpp
   FuncletLayout.cpp

llvm/lib/Transforms/Scalar/CMakeLists.txt

@@ -14,6 +14,7 @@ add_llvm_component_library(LLVMScalarOpts
   EarlyCSE.cpp
   FlattenCFGPass.cpp
   Float2Int.cpp
+  FPBuiltinFnSelection.cpp
   GuardWidening.cpp
   GVN.cpp
   GVNHoist.cpp

llvm/lib/CodeGen/FPBuiltinFnSelection.cpp → llvm/lib/Transforms/Scalar/FPBuiltinFnSelection.cpp

@@ -1,4 +1,4 @@
-//===- FPBuiltinFnSelection.cpp - Pre-ISel intrinsic lowering pass --------===//
+//===- FPBuiltinFnSelection.cpp - fpbuiltin intrinsic lowering pass -------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 // See https://llvm.org/LICENSE.txt for license information.
@@ -11,7 +11,7 @@
 //
 //===----------------------------------------------------------------------===//
 
-#include "llvm/CodeGen/FPBuiltinFnSelection.h"
+#include "llvm/Transforms/Scalar/FPBuiltinFnSelection.h"
 #include "llvm/Analysis/TargetLibraryInfo.h"
 #include "llvm/Analysis/TargetTransformInfo.h"
 #include "llvm/CodeGen/Passes.h"