ecf6466f01
This patch introduces generic x86-64 edge kinds, and refactors the MachO/x86-64 backend to use these edge kinds. This simplifies the implementation of the MachO/x86-64 backend and makes it possible to write generic x86-64 passes and utilities. The new edge kinds are different from the original set used in the MachO/x86-64 backend. Several edge kinds that were not meaningfully distinguished in that backend (e.g. the PCRelMinusN edges) have been merged into single edge kinds in the new scheme (these edge kinds can be reintroduced later if we find a use for them). At the same time, new edge kinds have been introduced to convey extra information about the state of the graph. E.g. The Request*AndTransformTo** edges represent GOT/TLVP relocations prior to synthesis of the GOT/TLVP entries, and the 'Relaxable' suffix distinguishes edges that are candidates for optimization from edges which should be left as-is (e.g. to enable runtime redirection). ELF/x86-64 will be refactored to use these generic edges at some point in the future, and I anticipate a similar refactor to create a generic arm64 support header too. Differential Revision: https://reviews.llvm.org/D98305
59 lines
1.8 KiB
C++
59 lines
1.8 KiB
C++
//===----- x86_64.cpp - Generic JITLink x86-64 edge kinds, utilities ------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// Generic utilities for graphs representing x86-64 objects.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/ExecutionEngine/JITLink/x86_64.h"
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#define DEBUG_TYPE "jitlink"
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namespace llvm {
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namespace jitlink {
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namespace x86_64 {
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const char *getEdgeKindName(Edge::Kind K) {
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switch (K) {
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case Pointer64:
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return "Pointer64";
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case Pointer32:
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return "Pointer32";
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case Delta64:
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return "Delta64";
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case Delta32:
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return "Delta32";
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case NegDelta64:
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return "NegDelta64";
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case NegDelta32:
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return "NegDelta32";
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case BranchPCRel32:
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return "BranchPCRel32";
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case BranchPCRel32ToPtrJumpStub:
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return "BranchPCRel32ToPtrJumpStub";
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case BranchPCRel32ToPtrJumpStubRelaxable:
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return "BranchPCRel32ToPtrJumpStubRelaxable";
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case RequestGOTAndTransformToDelta32:
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return "RequestGOTAndTransformToDelta32";
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case PCRel32GOTLoadRelaxable:
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return "PCRel32GOTLoadRelaxable";
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case RequestGOTAndTransformToPCRel32GOTLoadRelaxable:
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return "RequestGOTAndTransformToPCRel32GOTLoadRelaxable";
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case PCRel32TLVPLoadRelaxable:
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return "PCRel32TLVPLoadRelaxable";
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case RequestTLVPAndTransformToPCRel32TLVPLoadRelaxable:
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return "RequestTLVPAndTransformToPCRel32TLVPLoadRelaxable";
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default:
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return getGenericEdgeKindName(static_cast<Edge::Kind>(K));
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}
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}
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} // end namespace x86_64
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} // end namespace jitlink
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} // end namespace llvm
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