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author | Dimitry Andric <dim@FreeBSD.org> | 2012-04-14 13:54:10 +0000 |
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committer | Dimitry Andric <dim@FreeBSD.org> | 2012-04-14 13:54:10 +0000 |
commit | 63faed5b8e4f2755f127fcb8aa440480c0649327 (patch) | |
tree | 19c69a04768629f2d440944b71cbe90adae0b615 /lib/CodeGen/TargetFrameLoweringImpl.cpp | |
parent | d4c8b5d2e851b0e8a063c6bf8543a4823a26c15a (diff) | |
download | src-63faed5b8e4f2755f127fcb8aa440480c0649327.tar.gz src-63faed5b8e4f2755f127fcb8aa440480c0649327.zip |
Vendor import of llvm trunk r154661:vendor/llvm/llvm-trunk-r154661
Notes
Notes:
svn path=/vendor/llvm/dist/; revision=234285
svn path=/vendor/llvm/llvm-trunk-r154661/; revision=234286; tag=vendor/llvm/llvm-trunk-r154661
Diffstat (limited to 'lib/CodeGen/TargetFrameLoweringImpl.cpp')
-rw-r--r-- | lib/CodeGen/TargetFrameLoweringImpl.cpp | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/lib/CodeGen/TargetFrameLoweringImpl.cpp b/lib/CodeGen/TargetFrameLoweringImpl.cpp new file mode 100644 index 000000000000..cadb87815dbe --- /dev/null +++ b/lib/CodeGen/TargetFrameLoweringImpl.cpp @@ -0,0 +1,45 @@ +//===----- TargetFrameLoweringImpl.cpp - Implement target frame interface --==// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// Implements the layout of a stack frame on the target machine. +// +//===----------------------------------------------------------------------===// + +#include "llvm/CodeGen/MachineFrameInfo.h" +#include "llvm/CodeGen/MachineFunction.h" +#include "llvm/Target/TargetFrameLowering.h" +#include "llvm/Target/TargetMachine.h" +#include "llvm/Target/TargetRegisterInfo.h" + +#include <cstdlib> +using namespace llvm; + +TargetFrameLowering::~TargetFrameLowering() { +} + +/// getFrameIndexOffset - Returns the displacement from the frame register to +/// the stack frame of the specified index. This is the default implementation +/// which is overridden for some targets. +int TargetFrameLowering::getFrameIndexOffset(const MachineFunction &MF, + int FI) const { + const MachineFrameInfo *MFI = MF.getFrameInfo(); + return MFI->getObjectOffset(FI) + MFI->getStackSize() - + getOffsetOfLocalArea() + MFI->getOffsetAdjustment(); +} + +int TargetFrameLowering::getFrameIndexReference(const MachineFunction &MF, + int FI, unsigned &FrameReg) const { + const TargetRegisterInfo *RI = MF.getTarget().getRegisterInfo(); + + // By default, assume all frame indices are referenced via whatever + // getFrameRegister() says. The target can override this if it's doing + // something different. + FrameReg = RI->getFrameRegister(MF); + return getFrameIndexOffset(MF, FI); +} |