replica
/
hanchenye-llvm-project
2
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

PIC jump table entries are always 32-bit. This fixes PIC jump table support on X86-64. 

llvm-svn: 30590
This commit is contained in:
Evan Cheng 2006-09-24 05:22:38 +00:00
parent 25587182f3
commit 77c0757f8b
1 changed files with 4 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
View File

@ -857,18 +857,17 @@ void SelectionDAGLowering::visitJumpTable(SelectionDAGISel::JumpTable &JT) {
MVT::ValueType PTy = TLI.getPointerTy(); MVT::ValueType PTy = TLI.getPointerTy();
assert((PTy == MVT::i32 || PTy == MVT::i64) && assert((PTy == MVT::i32 || PTy == MVT::i64) &&
"Jump table entries are 32-bit values"); "Jump table entries are 32-bit values");
bool isPIC = TLI.getTargetMachine().getRelocationModel() == Reloc::PIC_;
// PIC jump table entries are 32-bit values. // PIC jump table entries are 32-bit values.
unsigned EntrySize = unsigned EntrySize = isPIC ? 4 : MVT::getSizeInBits(PTy)/8;
(TLI.getTargetMachine().getRelocationModel() == Reloc::PIC_)
? 4 : MVT::getSizeInBits(PTy)/8;
SDOperand Copy = DAG.getCopyFromReg(getRoot(), JT.Reg, PTy); SDOperand Copy = DAG.getCopyFromReg(getRoot(), JT.Reg, PTy);
SDOperand IDX = DAG.getNode(ISD::MUL, PTy, Copy, SDOperand IDX = DAG.getNode(ISD::MUL, PTy, Copy,
DAG.getConstant(EntrySize, PTy)); DAG.getConstant(EntrySize, PTy));
SDOperand TAB = DAG.getJumpTable(JT.JTI,PTy); SDOperand TAB = DAG.getJumpTable(JT.JTI,PTy);
SDOperand ADD = DAG.getNode(ISD::ADD, PTy, IDX, TAB); SDOperand ADD = DAG.getNode(ISD::ADD, PTy, IDX, TAB);
SDOperand LD = DAG.getLoad(PTy, Copy.getValue(1), ADD, SDOperand LD = DAG.getLoad(isPIC ? MVT::i32 : PTy, Copy.getValue(1), ADD,
DAG.getSrcValue(0)); DAG.getSrcValue(0));
if (TLI.getTargetMachine().getRelocationModel() == Reloc::PIC_) { if (isPIC) {
ADD = DAG.getNode(ISD::ADD, PTy, ADD = DAG.getNode(ISD::ADD, PTy,
((PTy != MVT::i32) ? DAG.getNode(ISD::SIGN_EXTEND, PTy, LD) : LD), TAB); ((PTy != MVT::i32) ? DAG.getNode(ISD::SIGN_EXTEND, PTy, LD) : LD), TAB);
DAG.setRoot(DAG.getNode(ISD::BRIND, MVT::Other, LD.getValue(1), ADD)); DAG.setRoot(DAG.getNode(ISD::BRIND, MVT::Other, LD.getValue(1), ADD));