================ @@ -0,0 +1,93 @@ +//===-- llvm/GEPNoWrapFlags.h - NoWrap flags for GEPs -----------*- C++ -*-===// +// +// 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 +// +//===----------------------------------------------------------------------===// +// +// This file defines the nowrap flags for getelementptr operators. +// +//===----------------------------------------------------------------------===// + +#ifndef LLVM_IR_GEPNOWRAPFLAGS_H +#define LLVM_IR_GEPNOWRAPFLAGS_H + +namespace llvm { + +/// Represents flags for the getelementptr instruction/expression. +/// The following flags are supported: +/// * inbounds (implies nusw) +/// * nusw (no unsigned signed wrap) +/// * nuw (no unsigned wrap) +/// See LangRef for a description of their semantics. +class GEPNoWrapFlags { + enum : unsigned { + InBoundsFlag = (1 << 0), + NUSWFlag = (1 << 1), + NUWFlag = (1 << 2), + }; + + unsigned Flags; + GEPNoWrapFlags(unsigned Flags) : Flags(Flags) { + assert((!isInBounds() || hasNoUnsignedSignedWrap()) && + "inbounds implies nusw"); + } + +public: + GEPNoWrapFlags() : Flags(0) {} + // For historical reasons, interpret plain boolean as InBounds. + // TODO: Migrate users to pass explicit GEPNoWrapFlags and remove this ctor. + GEPNoWrapFlags(bool IsInBounds) ---------------- nikic wrote:
This is a backwards-compatiblity ctor because we're replacing existing `bool IsInBounds` parameters with `GEPNoWrapFlags NW` instead. As the TODO indicates, this ctor will be removed in the future. It avoids having to touch large amounts of code in this PR in sub-optimal ways. https://github.com/llvm/llvm-project/pull/90824 _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
