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58 lines
1.7 KiB
C++
58 lines
1.7 KiB
C++
//===-- ARMSubtarget.cpp - ARM Subtarget Information ------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file was developed by Evan Cheng and is distributed under the
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// University of Illinois Open Source License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements the ARM specific subclass of TargetSubtarget.
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//
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//===----------------------------------------------------------------------===//
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#include "ARMSubtarget.h"
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#include "ARMGenSubtarget.inc"
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#include "llvm/Module.h"
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#include "llvm/Support/CommandLine.h"
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using namespace llvm;
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// FIXME: this is temporary.
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static cl::opt<bool> Thumb("enable-thumb",
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cl::desc("Switch to thumb mode in ARM backend"));
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ARMSubtarget::ARMSubtarget(const Module &M, const std::string &FS)
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: ARMArchVersion(V4T)
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, HasVFP2(false)
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, UseThumbBacktraces(false)
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, IsR9Reserved(false)
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, stackAlignment(8)
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, TargetType(isELF) { // Default to ELF unless otherwise specified.
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// Determine default and user specified characteristics
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std::string CPU = "generic";
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// Parse features string.
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ParseSubtargetFeatures(FS, CPU);
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IsThumb = Thumb;
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// Set the boolean corresponding to the current target triple, or the default
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// if one cannot be determined, to true.
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const std::string& TT = M.getTargetTriple();
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if (TT.length() > 5) {
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if (TT.find("-darwin") != std::string::npos)
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TargetType = isDarwin;
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} else if (TT.empty()) {
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#if defined(__APPLE__)
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TargetType = isDarwin;
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#endif
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}
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if (isTargetDarwin()) {
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UseThumbBacktraces = true;
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IsR9Reserved = true;
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stackAlignment = 4;
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}
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}
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