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Add jump tables

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75984 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Anton Korobeynikov 2009-07-16 14:07:50 +00:00
parent 983d3a1ee5
commit c16cdc5de7
5 changed files with 69 additions and 11 deletions
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8
lib/Target/SystemZ/AsmPrinter/SystemZAsmPrinter.cpp
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@ -187,6 +187,9 @@ bool SystemZAsmPrinter::runOnMachineFunction(MachineFunction &MF) {
if (TAI->hasDotTypeDotSizeDirective())
O << "\t.size\t" << CurrentFnName << ", .-" << CurrentFnName << '\n';
// Print out jump tables referenced by the function.
EmitJumpTableInfo(MF.getJumpTableInfo(), MF);
O.flush();
// We didn't modify anything
@ -228,6 +231,11 @@ void SystemZAsmPrinter::printOperand(const MachineInstr *MI, int OpNum,
return;
case MachineOperand::MO_MachineBasicBlock:
printBasicBlockLabel(MO.getMBB());
return;
case MachineOperand::MO_JumpTableIndex:
O << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber() << '_'
<< MO.getIndex();
return;
case MachineOperand::MO_GlobalAddress: {
const GlobalValue *GV = MO.getGlobal();

11
lib/Target/SystemZ/SystemZISelLowering.cpp
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@ -67,6 +67,7 @@ SystemZTargetLowering::SystemZTargetLowering(SystemZTargetMachine &tm) :
setOperationAction(ISD::BR_CC, MVT::i32, Custom);
setOperationAction(ISD::BR_CC, MVT::i64, Custom);
setOperationAction(ISD::GlobalAddress, MVT::i64, Custom);
setOperationAction(ISD::JumpTable, MVT::i64, Custom);
// FIXME: Can we lower these 2 efficiently?
setOperationAction(ISD::SETCC, MVT::i32, Expand);
@ -90,6 +91,7 @@ SDValue SystemZTargetLowering::LowerOperation(SDValue Op, SelectionDAG &DAG) {
case ISD::BR_CC: return LowerBR_CC(Op, DAG);
case ISD::SELECT_CC: return LowerSELECT_CC(Op, DAG);
case ISD::GlobalAddress: return LowerGlobalAddress(Op, DAG);
case ISD::JumpTable: return LowerJumpTable(Op, DAG);
default:
assert(0 && "unimplemented operand");
return SDValue();
@ -542,6 +544,15 @@ SDValue SystemZTargetLowering::LowerGlobalAddress(SDValue Op,
}
SDValue SystemZTargetLowering::LowerJumpTable(SDValue Op,
SelectionDAG &DAG) {
DebugLoc dl = Op.getDebugLoc();
JumpTableSDNode *JT = cast<JumpTableSDNode>(Op);
SDValue Result = DAG.getTargetJumpTable(JT->getIndex(), getPointerTy());
return DAG.getNode(SystemZISD::PCRelativeWrapper, dl, getPointerTy(), Result);
}
const char *SystemZTargetLowering::getTargetNodeName(unsigned Opcode) const {
switch (Opcode) {
case SystemZISD::RET_FLAG: return "SystemZISD::RET_FLAG";

1
lib/Target/SystemZ/SystemZISelLowering.h
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@ -70,6 +70,7 @@ namespace llvm {
SDValue LowerBR_CC(SDValue Op, SelectionDAG &DAG);
SDValue LowerSELECT_CC(SDValue Op, SelectionDAG &DAG);
SDValue LowerGlobalAddress(SDValue Op, SelectionDAG &DAG);
SDValue LowerJumpTable(SDValue Op, SelectionDAG &DAG);
SDValue LowerCCCArguments(SDValue Op, SelectionDAG &DAG);
SDValue LowerCCCCallTo(SDValue Op, SelectionDAG &DAG, unsigned CC);

19
lib/Target/SystemZ/SystemZInstrInfo.td
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@ -96,13 +96,11 @@ let isReturn = 1, isTerminator = 1, isBarrier = 1, hasCtrlDep = 1 in {
}
let isBranch = 1, isTerminator = 1 in {
let isBarrier = 1 in
let isBarrier = 1 in {
def JMP : Pseudo<(outs), (ins brtarget:$dst), "j\t{$dst}", [(br bb:$dst)]>;
let isBarrier = 1, isIndirectBranch = 1 in {
let isIndirectBranch = 1 in
def JMPr : Pseudo<(outs), (ins GR64:$dst), "br\t{$dst}", [(brind GR64:$dst)]>;
// FIXME: displacement here is 12 bits
def JMPrri : Pseudo<(outs), (ins rriaddr:$dst), "b\t{$dst}", [(brind rriaddr:$dst)]>;
}
let Uses = [PSW] in {
@ -699,10 +697,17 @@ def UCMPZX64rm32 : Pseudo<(outs), (ins GR64:$src1, rriaddr:$src2),
// Non-Instruction Patterns.
//===----------------------------------------------------------------------===//
// JumpTable
def : Pat<(SystemZpcrelwrapper tjumptable:$src), (LA64rm tjumptable:$src)>;
// anyext
def : Pat<(i64 (anyext GR32:$src)),
(INSERT_SUBREG (i64 (IMPLICIT_DEF)), GR32:$src, subreg_32bit)>;
// calls
def : Pat<(SystemZcall (i64 tglobaladdr:$dst)), (CALLi tglobaladdr:$dst)>;
def : Pat<(SystemZcall (i64 texternalsym:$dst)), (CALLi texternalsym:$dst)>;
//===----------------------------------------------------------------------===//
// Peepholes.
//===----------------------------------------------------------------------===//
@ -728,12 +733,6 @@ def : Pat<(extloadi64i8 rriaddr:$src), (MOVZX64rm8 rriaddr:$src)>;
def : Pat<(extloadi64i16 rriaddr:$src), (MOVZX64rm16 rriaddr:$src)>;
def : Pat<(extloadi64i32 rriaddr:$src), (MOVZX64rm32 rriaddr:$src)>;
// calls
def : Pat<(SystemZcall (i64 tglobaladdr:$dst)),
(CALLi tglobaladdr:$dst)>;
def : Pat<(SystemZcall (i64 texternalsym:$dst)),
(CALLi texternalsym:$dst)>;
// muls
def : Pat<(mulhs GR32:$src1, GR32:$src2),
(EXTRACT_SUBREG (MUL64rrP (INSERT_SUBREG (i64 (IMPLICIT_DEF)),

39
test/CodeGen/SystemZ/09-Switches.ll Normal file
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@ -0,0 +1,39 @@
; RUN: llvm-as < %s | llc -march=systemz | grep larl
define i32 @main(i32 %tmp158) {
entry:
switch i32 %tmp158, label %bb336 [
i32 -2147483648, label %bb338
i32 -2147483647, label %bb338
i32 -2147483646, label %bb338
i32 120, label %bb338
i32 121, label %bb339
i32 122, label %bb340
i32 123, label %bb341
i32 124, label %bb342
i32 125, label %bb343
i32 126, label %bb336
i32 1024, label %bb338
i32 0, label %bb338
i32 1, label %bb338
i32 2, label %bb338
i32 3, label %bb338
i32 4, label %bb338
i32 5, label %bb338
]
bb336:
ret i32 10
bb338:
ret i32 11
bb339:
ret i32 12
bb340:
ret i32 13
bb341:
ret i32 14
bb342:
ret i32 15
bb343:
ret i32 18
}