a7262d2d9b
Add overflow flags support to the following ops: * `arith.addi` * `arith.subi` * `arith.muli` Example of new syntax: ``` %res = arith.addi %arg1, %arg2 overflow<nsw> : i64 ``` Similar to existing LLVM dialect syntax ``` %res = llvm.add %arg1, %arg2 overflow<nsw> : i64 ``` Tablegen canonicalization patterns updated to always drop flags, proper support with tests will be added later. Updated LLVMIR translation as part of this commit as it currenly written in a way that it will crash when new attributes added to arith ops otherwise. Discussion https://discourse.llvm.org/t/rfc-integer-overflow-flags-support-in-arith-dialect/76025 --------- Co-authored-by: Yi Wu <yi.wu2@arm.com>
58 lines
2.4 KiB
C++
58 lines
2.4 KiB
C++
//===- AttrToLLVMConverter.cpp - Arith attributes conversion to LLVM ------===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "mlir/Conversion/ArithCommon/AttrToLLVMConverter.h"
|
|
|
|
using namespace mlir;
|
|
|
|
LLVM::FastmathFlags
|
|
mlir::arith::convertArithFastMathFlagsToLLVM(arith::FastMathFlags arithFMF) {
|
|
LLVM::FastmathFlags llvmFMF{};
|
|
const std::pair<arith::FastMathFlags, LLVM::FastmathFlags> flags[] = {
|
|
{arith::FastMathFlags::nnan, LLVM::FastmathFlags::nnan},
|
|
{arith::FastMathFlags::ninf, LLVM::FastmathFlags::ninf},
|
|
{arith::FastMathFlags::nsz, LLVM::FastmathFlags::nsz},
|
|
{arith::FastMathFlags::arcp, LLVM::FastmathFlags::arcp},
|
|
{arith::FastMathFlags::contract, LLVM::FastmathFlags::contract},
|
|
{arith::FastMathFlags::afn, LLVM::FastmathFlags::afn},
|
|
{arith::FastMathFlags::reassoc, LLVM::FastmathFlags::reassoc}};
|
|
for (auto [arithFlag, llvmFlag] : flags) {
|
|
if (bitEnumContainsAny(arithFMF, arithFlag))
|
|
llvmFMF = llvmFMF | llvmFlag;
|
|
}
|
|
return llvmFMF;
|
|
}
|
|
|
|
LLVM::FastmathFlagsAttr
|
|
mlir::arith::convertArithFastMathAttrToLLVM(arith::FastMathFlagsAttr fmfAttr) {
|
|
arith::FastMathFlags arithFMF = fmfAttr.getValue();
|
|
return LLVM::FastmathFlagsAttr::get(
|
|
fmfAttr.getContext(), convertArithFastMathFlagsToLLVM(arithFMF));
|
|
}
|
|
|
|
LLVM::IntegerOverflowFlags mlir::arith::convertArithOveflowFlagsToLLVM(
|
|
arith::IntegerOverflowFlags arithFlags) {
|
|
LLVM::IntegerOverflowFlags llvmFlags{};
|
|
const std::pair<arith::IntegerOverflowFlags, LLVM::IntegerOverflowFlags>
|
|
flags[] = {
|
|
{arith::IntegerOverflowFlags::nsw, LLVM::IntegerOverflowFlags::nsw},
|
|
{arith::IntegerOverflowFlags::nuw, LLVM::IntegerOverflowFlags::nuw}};
|
|
for (auto [arithFlag, llvmFlag] : flags) {
|
|
if (bitEnumContainsAny(arithFlags, arithFlag))
|
|
llvmFlags = llvmFlags | llvmFlag;
|
|
}
|
|
return llvmFlags;
|
|
}
|
|
|
|
LLVM::IntegerOverflowFlagsAttr mlir::arith::convertArithOveflowAttrToLLVM(
|
|
arith::IntegerOverflowFlagsAttr flagsAttr) {
|
|
arith::IntegerOverflowFlags arithFlags = flagsAttr.getValue();
|
|
return LLVM::IntegerOverflowFlagsAttr::get(
|
|
flagsAttr.getContext(), convertArithOveflowFlagsToLLVM(arithFlags));
|
|
}
|