Revert "Reland yet again: [mlir] Add FP software implementation lowering pass: arith-to-apfloat" (#167834)

Reverts #167608

Broken builder https://lab.llvm.org/buildbot/#/builders/52/builds/12781

Author: makslevental

mlir/include/mlir/Conversion/ArithToAPFloat/ArithToAPFloat.h

@@ -12,7 +12,6 @@
 #include "mlir/Conversion/AMDGPUToROCDL/AMDGPUToROCDL.h"
 #include "mlir/Conversion/AffineToStandard/AffineToStandard.h"
 #include "mlir/Conversion/ArithToAMDGPU/ArithToAMDGPU.h"
-#include "mlir/Conversion/ArithToAPFloat/ArithToAPFloat.h"
 #include "mlir/Conversion/ArithToArmSME/ArithToArmSME.h"
 #include "mlir/Conversion/ArithToEmitC/ArithToEmitCPass.h"
 #include "mlir/Conversion/ArithToLLVM/ArithToLLVM.h"

mlir/include/mlir/Conversion/Passes.h

@@ -186,21 +186,6 @@ def ArithToLLVMConversionPass : Pass<"convert-arith-to-llvm"> {
   ];
 }
 
-//===----------------------------------------------------------------------===//
-// ArithToAPFloat
-//===----------------------------------------------------------------------===//
-
-def ArithToAPFloatConversionPass
-    : Pass<"convert-arith-to-apfloat", "ModuleOp"> {
-  let summary = "Convert Arith ops to APFloat runtime library calls";
-  let description = [{
-    This pass converts supported Arith ops to APFloat-based runtime library
-    calls (APFloatWrappers.cpp). APFloat is a software implementation of
-    floating-point arithmetic operations.
-  }];
-  let dependentDialects = ["func::FuncDialect"];
-}
-
 //===----------------------------------------------------------------------===//
 // ArithToSPIRV
 //===----------------------------------------------------------------------===//

mlir/include/mlir/Conversion/Passes.td

@@ -60,13 +60,6 @@ mlir::FailureOr<std::pair<mlir::func::FuncOp, mlir::func::CallOp>>
 deduplicateArgsOfFuncOp(mlir::RewriterBase &rewriter, mlir::func::FuncOp funcOp,
                         mlir::ModuleOp moduleOp);
 
-/// Look up a FuncOp with signature `resultTypes`(`paramTypes`)` and name
-/// `name`. Return a failure if the FuncOp is found but with a different
-/// signature.
-FailureOr<FuncOp> lookupFnDecl(SymbolOpInterface symTable, StringRef name,
-                               FunctionType funcT,
-                               SymbolTableCollection *symbolTables = nullptr);
-
 } // namespace func
 } // namespace mlir
 

mlir/include/mlir/Dialect/Func/Utils/Utils.h

@@ -52,10 +52,6 @@ lookupOrCreatePrintF32Fn(OpBuilder &b, Operation *moduleOp,
 FailureOr<LLVM::LLVMFuncOp>
 lookupOrCreatePrintF64Fn(OpBuilder &b, Operation *moduleOp,
                          SymbolTableCollection *symbolTables = nullptr);
-FailureOr<LLVM::LLVMFuncOp>
-lookupOrCreateApFloatPrintFn(OpBuilder &b, Operation *moduleOp,
-                             SymbolTableCollection *symbolTables = nullptr);
-
 /// Declares a function to print a C-string.
 /// If a custom runtime function is defined via `runtimeFunctionName`, it must
 /// have the signature void(char const*). The default function is `printString`.

mlir/include/mlir/Dialect/LLVMIR/FunctionCallUtils.h

@@ -14,7 +14,6 @@
 #include "mlir/Conversion/LLVMCommon/VectorPattern.h"
 #include "mlir/Dialect/Arith/IR/Arith.h"
 #include "mlir/Dialect/Arith/Transforms/Passes.h"
-#include "mlir/Dialect/LLVMIR/FunctionCallUtils.h"
 #include "mlir/Dialect/LLVMIR/LLVMAttrs.h"
 #include "mlir/Dialect/LLVMIR/LLVMDialect.h"
 #include "mlir/IR/TypeUtilities.h"

mlir/lib/Conversion/ArithToAPFloat/ArithToAPFloat.cpp

@@ -2,7 +2,6 @@ add_subdirectory(AffineToStandard)
 add_subdirectory(AMDGPUToROCDL)
 add_subdirectory(ArithCommon)
 add_subdirectory(ArithToAMDGPU)
-add_subdirectory(ArithToAPFloat)
 add_subdirectory(ArithToArmSME)
 add_subdirectory(ArithToEmitC)
 add_subdirectory(ArithToLLVM)

mlir/lib/Conversion/ArithToAPFloat/CMakeLists.txt

@@ -1654,20 +1654,6 @@ class VectorPrintOpConversion : public ConvertOpToLLVMPattern<vector::PrintOp> {
           return failure();
         }
       }
-    } else if (auto floatTy = dyn_cast<FloatType>(printType)) {
-      // Print other floating-point types using the APFloat runtime library.
-      int32_t sem =
-          llvm::APFloatBase::SemanticsToEnum(floatTy.getFloatSemantics());
-      Value semValue = LLVM::ConstantOp::create(
-          rewriter, loc, rewriter.getI32Type(),
-          rewriter.getIntegerAttr(rewriter.getI32Type(), sem));
-      Value floatBits =
-          LLVM::ZExtOp::create(rewriter, loc, rewriter.getI64Type(), value);
-      printer =
-          LLVM::lookupOrCreateApFloatPrintFn(rewriter, parent, symbolTables);
-      emitCall(rewriter, loc, printer.value(),
-               ValueRange({semValue, floatBits}));
-      return success();
     } else {
       return failure();
     }