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3d765ce4b7
This adds the plumbing for the Tiny code model for the AArch64 backend. This, instead of loading addresses through the normal ADRP;ADD pair used in the Small model, uses a single ADR. The 21 bit range of an ADR means that the code and its statically defined symbols need to be within 1MB of each other. This makes it mostly interesting for embedded applications where we want to fit as much as we can in as small a space as possible. Differential Revision: https://reviews.llvm.org/D49673 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@340397 91177308-0d34-0410-b5e6-96231b3b80d8
63 lines
1.4 KiB
C++
63 lines
1.4 KiB
C++
//===-- llvm/Support/CodeGen.h - CodeGen Concepts ---------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file define some types which define code generation concepts. For
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// example, relocation model.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_SUPPORT_CODEGEN_H
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#define LLVM_SUPPORT_CODEGEN_H
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namespace llvm {
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// Relocation model types.
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namespace Reloc {
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enum Model { Static, PIC_, DynamicNoPIC, ROPI, RWPI, ROPI_RWPI };
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}
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// Code model types.
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namespace CodeModel {
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// Sync changes with CodeGenCWrappers.h.
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enum Model { Tiny, Small, Kernel, Medium, Large };
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}
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namespace PICLevel {
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// This is used to map -fpic/-fPIC.
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enum Level { NotPIC=0, SmallPIC=1, BigPIC=2 };
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}
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namespace PIELevel {
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enum Level { Default=0, Small=1, Large=2 };
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}
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// TLS models.
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namespace TLSModel {
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enum Model {
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GeneralDynamic,
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LocalDynamic,
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InitialExec,
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LocalExec
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};
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}
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// Code generation optimization level.
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namespace CodeGenOpt {
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enum Level {
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None, // -O0
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Less, // -O1
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Default, // -O2, -Os
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Aggressive // -O3
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};
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}
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} // end llvm namespace
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#endif
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