llvm-6502/lib/Target/R600/MCTargetDesc/AMDGPUELFObjectWriter.cpp
Tom Stellard b664d47cb0 R600/SI: Store constant initializer data in constant memory
This implements a solution for constant initializers suggested
by Vadim Girlin, where we store the data after the shader code
and then use the S_GETPC instruction to compute its address.

This saves use the trouble of creating a new buffer for constant data
and then having to pass the pointer to the kernel via user SGPRs or the
input buffer.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@213530 91177308-0d34-0410-b5e6-96231b3b80d8
2014-07-21 14:01:14 +00:00

40 lines
1.0 KiB
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//===-- AMDGPUELFObjectWriter.cpp - AMDGPU ELF Writer ----------------------==//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
/// \file
//===----------------------------------------------------------------------===//
#include "AMDGPUMCTargetDesc.h"
#include "llvm/MC/MCELFObjectWriter.h"
#include "llvm/MC/MCFixup.h"
using namespace llvm;
namespace {
class AMDGPUELFObjectWriter : public MCELFObjectTargetWriter {
public:
AMDGPUELFObjectWriter();
protected:
unsigned GetRelocType(const MCValue &Target, const MCFixup &Fixup,
bool IsPCRel) const override {
return Fixup.getKind();
}
};
} // End anonymous namespace
AMDGPUELFObjectWriter::AMDGPUELFObjectWriter()
: MCELFObjectTargetWriter(false, 0, 0, false) { }
MCObjectWriter *llvm::createAMDGPUELFObjectWriter(raw_ostream &OS) {
MCELFObjectTargetWriter *MOTW = new AMDGPUELFObjectWriter();
return createELFObjectWriter(MOTW, OS, true);
}