llvm/lib/Target/CellSPU/SPUTargetAsmInfo.cpp
Scott Michel f0569be4a9 - Remove Tilmann's custom truncate lowering: it completely hosed over
DAGcombine's ability to find reasons to remove truncates when they were not
  needed. Consequently, the CellSPU backend would produce correct, but _really
  slow and horrible_, code.

  Replaced with instruction sequences that do the equivalent truncation in
  SPUInstrInfo.td.

- Re-examine how unaligned loads and stores work. Generated unaligned
  load code has been tested on the CellSPU hardware; see the i32operations.c
  and i64operations.c in CodeGen/CellSPU/useful-harnesses.  (While they may be
  toy test code, it does prove that some real world code does compile
  correctly.)

- Fix truncating stores in bug 3193 (note: unpack_df.ll will still make llc
  fault because i64 ult is not yet implemented.)

- Added i64 eq and neq for setcc and select/setcc; started new instruction
  information file for them in SPU64InstrInfo.td. Additional i64 operations
  should be added to this file and not to SPUInstrInfo.td.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61447 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-27 04:51:36 +00:00

51 lines
1.8 KiB
C++

//===-- SPUTargetAsmInfo.cpp - Cell SPU asm properties ----------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file contains the declarations of the SPUTargetAsmInfo properties.
//
//===----------------------------------------------------------------------===//
#include "SPUTargetAsmInfo.h"
#include "SPUTargetMachine.h"
#include "llvm/Function.h"
#include "llvm/Support/Compiler.h"
using namespace llvm;
SPULinuxTargetAsmInfo::SPULinuxTargetAsmInfo(const SPUTargetMachine &TM) :
SPUTargetAsmInfo<ELFTargetAsmInfo>(TM) {
PCSymbol = ".";
CommentString = "#";
GlobalPrefix = "";
PrivateGlobalPrefix = ".L";
// This corresponds to what the gcc SPU compiler emits, for consistency.
CStringSection = ".rodata.str";
// BSS section needs to be emitted as ".section"
BSSSection = "\t.section\t.bss";
BSSSection_ = getUnnamedSection("\t.section\t.bss",
SectionFlags::Writeable | SectionFlags::BSS,
true);
}
/// PreferredEHDataFormat - This hook allows the target to select data
/// format used for encoding pointers in exception handling data. Reason is
/// 0 for data, 1 for code labels, 2 for function pointers. Global is true
/// if the symbol can be relocated.
unsigned
SPULinuxTargetAsmInfo::PreferredEHDataFormat(DwarfEncoding::Target Reason,
bool Global) const {
// We really need to write something here.
return TargetAsmInfo::PreferredEHDataFormat(Reason, Global);
}
// Instantiate default implementation.
TEMPLATE_INSTANTIATION(class SPUTargetAsmInfo<TargetAsmInfo>);