aboutsummaryrefslogtreecommitdiff
path: root/lib/Target/Alpha/AlphaISelDAGToDAG.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'lib/Target/Alpha/AlphaISelDAGToDAG.cpp')
-rw-r--r--lib/Target/Alpha/AlphaISelDAGToDAG.cpp151
1 files changed, 119 insertions, 32 deletions
diff --git a/lib/Target/Alpha/AlphaISelDAGToDAG.cpp b/lib/Target/Alpha/AlphaISelDAGToDAG.cpp
index 256ae54989..b920bc4d8c 100644
--- a/lib/Target/Alpha/AlphaISelDAGToDAG.cpp
+++ b/lib/Target/Alpha/AlphaISelDAGToDAG.cpp
@@ -38,6 +38,10 @@ namespace {
class AlphaDAGToDAGISel : public SelectionDAGISel {
AlphaTargetLowering AlphaLowering;
+ static const int IMM_LOW = -32768;
+ static const int IMM_HIGH = 32767;
+ static const int IMM_MULT = 65536;
+
public:
AlphaDAGToDAGISel(TargetMachine &TM)
: SelectionDAGISel(AlphaLowering), AlphaLowering(TM) {}
@@ -108,13 +112,42 @@ SDOperand AlphaDAGToDAGISel::Select(SDOperand Op) {
case ISD::TAILCALL:
case ISD::CALL: return SelectCALL(Op);
- case ISD::DYNAMIC_STACKALLOC:
- assert(0 && "You want these too?");
+ case ISD::DYNAMIC_STACKALLOC: {
+ if (!isa<ConstantSDNode>(N->getOperand(2)) ||
+ cast<ConstantSDNode>(N->getOperand(2))->getValue() != 0) {
+ std::cerr << "Cannot allocate stack object with greater alignment than"
+ << " the stack alignment yet!";
+ abort();
+ }
+ SDOperand Chain = Select(N->getOperand(0));
+ SDOperand Amt = Select(N->getOperand(1));
+ SDOperand Reg = CurDAG->getRegister(Alpha::R30, MVT::i64);
+ SDOperand Val = CurDAG->getCopyFromReg(Chain, Alpha::R30, MVT::i64);
+ Chain = Val.getValue(1);
+
+ // Subtract the amount (guaranteed to be a multiple of the stack alignment)
+ // from the stack pointer, giving us the result pointer.
+ SDOperand Result = CurDAG->getTargetNode(Alpha::SUBQ, MVT::i64, Val, Amt);
+
+ // Copy this result back into R30.
+ Chain = CurDAG->getNode(ISD::CopyToReg, MVT::Other, Chain, Reg, Result);
+
+ // Copy this result back out of R30 to make sure we're not using the stack
+ // space without decrementing the stack pointer.
+ Result = CurDAG->getCopyFromReg(Chain, Alpha::R30, MVT::i64);
+
+ // Finally, replace the DYNAMIC_STACKALLOC with the copyfromreg.
+ CodeGenMap[Op.getValue(0)] = Result;
+ CodeGenMap[Op.getValue(1)] = Result.getValue(1);
+ return SDOperand(Result.Val, Op.ResNo);
+ }
case ISD::BRCOND: {
SDOperand Chain = Select(N->getOperand(0));
SDOperand CC = Select(N->getOperand(1));
- CurDAG->SelectNodeTo(N, Alpha::BNE, MVT::Other, CC, Chain);
+ MachineBasicBlock *Dest =
+ cast<BasicBlockSDNode>(N->getOperand(2))->getBasicBlock();
+ CurDAG->SelectNodeTo(N, Alpha::BNE, MVT::Other, CC, CurDAG->getBasicBlock(Dest), Chain);
return SDOperand(N, 0);
}
case ISD::LOAD:
@@ -148,6 +181,33 @@ SDOperand AlphaDAGToDAGISel::Select(SDOperand Op) {
getI64Imm(0), Address, Chain);
return SDOperand(N, Op.ResNo);
}
+ case ISD::STORE:
+ case ISD::TRUNCSTORE: {
+ SDOperand Chain = Select(N->getOperand(0));
+ SDOperand Value = Select(N->getOperand(1));
+ SDOperand Address = Select(N->getOperand(2));
+
+ unsigned Opc = Alpha::WTF;
+
+ if (N->getOpcode() == ISD::STORE) {
+ switch (N->getOperand(1).getValueType()) {
+ case MVT::i64: Opc = Alpha::STQ; break;
+ case MVT::f64: Opc = Alpha::STT; break;
+ case MVT::f32: Opc = Alpha::STS; break;
+ default: assert(0 && "Bad store!");
+ };
+ } else { //TRUNCSTORE
+ switch (cast<VTSDNode>(N->getOperand(4))->getVT()) {
+ case MVT::i32: Opc = Alpha::STL; break;
+ case MVT::i16: Opc = Alpha::STW; break;
+ case MVT::i8: Opc = Alpha::STB; break;
+ default: assert(0 && "Bad truncstore!");
+ };
+ }
+ CurDAG->SelectNodeTo(N, Opc, MVT::Other, Value, getI64Imm(0), Address,
+ Chain);
+ return SDOperand(N, 0);
+ }
case ISD::BR: {
CurDAG->SelectNodeTo(N, Alpha::BR_DAG, MVT::Other, N->getOperand(1),
@@ -155,32 +215,19 @@ SDOperand AlphaDAGToDAGISel::Select(SDOperand Op) {
return SDOperand(N, 0);
}
- case ISD::UNDEF:
- if (N->getValueType(0) == MVT::i64)
- CurDAG->SelectNodeTo(N, Alpha::IDEF, MVT::i64);
-// else if (N->getValueType(0) == MVT::f32)
-// CurDAG->SelectNodeTo(N, PPC::IMPLICIT_DEF_F4, MVT::f32);
-// else
-// CurDAG->SelectNodeTo(N, PPC::IMPLICIT_DEF_F8, MVT::f64);
- return SDOperand(N, 0);
case ISD::FrameIndex: {
-// int FI = cast<FrameIndexSDNode>(N)->getIndex();
-// CurDAG->SelectNodeTo(N, Alpha::LDA, MVT::i64,
-// CurDAG->getTargetFrameIndex(FI, MVT::i32),
-// getI32Imm(0));
-// return SDOperand(N, 0);
- assert(0 && "Frame?, you are suppose to look through the window, not at the frame!");
+ int FI = cast<FrameIndexSDNode>(N)->getIndex();
+ CurDAG->SelectNodeTo(N, Alpha::LDA, MVT::i64,
+ CurDAG->getTargetFrameIndex(FI, MVT::i32),
+ getI64Imm(0));
+ return SDOperand(N, 0);
}
case ISD::ConstantPool: {
-// Constant *C = cast<ConstantPoolSDNode>(N)->get();
-// SDOperand Tmp, CPI = CurDAG->getTargetConstantPool(C, MVT::i32);
-// if (PICEnabled)
-// Tmp = CurDAG->getTargetNode(PPC::ADDIS, MVT::i32, getGlobalBaseReg(),CPI);
-// else
-// Tmp = CurDAG->getTargetNode(PPC::LIS, MVT::i32, CPI);
-// CurDAG->SelectNodeTo(N, PPC::LA, MVT::i32, Tmp, CPI);
-// return SDOperand(N, 0);
- assert(0 && "Constants are overrated");
+ Constant *C = cast<ConstantPoolSDNode>(N)->get();
+ SDOperand Tmp, CPI = CurDAG->getTargetConstantPool(C, MVT::i64);
+ Tmp = CurDAG->getTargetNode(Alpha::LDAHr, MVT::i64, CPI, getGlobalBaseReg());
+ CurDAG->SelectNodeTo(N, Alpha::LDAr, MVT::i64, CPI, Tmp);
+ return SDOperand(N, 0);
}
case ISD::GlobalAddress: {
GlobalValue *GV = cast<GlobalAddressSDNode>(N)->getGlobal();
@@ -219,15 +266,45 @@ SDOperand AlphaDAGToDAGISel::Select(SDOperand Op) {
CurDAG->SelectNodeTo(N, Alpha::RETDAG, MVT::Other, Chain);
return SDOperand(N, 0);
}
-
-
-
+ case ISD::Constant: {
+ int64_t val = (int64_t)cast<ConstantSDNode>(N)->getValue();
+ if (val > (int64_t)IMM_HIGH +(int64_t)IMM_HIGH* (int64_t)IMM_MULT ||
+ val < (int64_t)IMM_LOW + (int64_t)IMM_LOW * (int64_t)IMM_MULT) {
+ MachineConstantPool *CP = BB->getParent()->getConstantPool();
+ ConstantUInt *C =
+ ConstantUInt::get(Type::getPrimitiveType(Type::ULongTyID) , val);
+ SDOperand Tmp, CPI = CurDAG->getTargetConstantPool(C, MVT::i64);
+ Tmp = CurDAG->getTargetNode(Alpha::LDAHr, MVT::i64, CPI, getGlobalBaseReg());
+ CurDAG->SelectNodeTo(N, Alpha::LDAr, MVT::i64, CPI, Tmp);
+ return SDOperand(N, 0);
+ }
+ }
+ case ISD::ConstantFP:
+ if (ConstantFPSDNode *CN = dyn_cast<ConstantFPSDNode>(N)) {
+ bool isDouble = N->getValueType(0) == MVT::f64;
+ MVT::ValueType T = isDouble ? MVT::f64 : MVT::f32;
+ if (CN->isExactlyValue(+0.0)) {
+ CurDAG->SelectNodeTo(N, isDouble ? Alpha::CPYST : Alpha::CPYSS, T,
+ CurDAG->getRegister(Alpha::F31, T),
+ CurDAG->getRegister(Alpha::F31, T));
+ return SDOperand(N, 0);
+ } else if ( CN->isExactlyValue(-0.0)) {
+ CurDAG->SelectNodeTo(N, isDouble ? Alpha::CPYSNT : Alpha::CPYSNS, T,
+ CurDAG->getRegister(Alpha::F31, T),
+ CurDAG->getRegister(Alpha::F31, T));
+ return SDOperand(N, 0);
+ } else {
+ abort();
+ }
+ }
}
return SelectCode(Op);
}
SDOperand AlphaDAGToDAGISel::SelectCALL(SDOperand Op) {
+ //TODO: add flag stuff to prevent nondeturministic breakage!
+
SDNode *N = Op.Val;
SDOperand Chain = Select(N->getOperand(0));
SDOperand Addr = Select(N->getOperand(1));
@@ -251,10 +328,12 @@ SDOperand AlphaDAGToDAGISel::SelectCALL(SDOperand Op) {
for (int i = 0; i < std::min(6, count); ++i) {
if (MVT::isInteger(TypeOperands[i])) {
Chain = CurDAG->getCopyToReg(Chain, args_int[i], CallOperands[i]);
- } else {
- assert(0 && "No FP support yet");
- }
+ } else if (TypeOperands[i] == MVT::f64 || TypeOperands[i] == MVT::f64) {
+ Chain = CurDAG->getCopyToReg(Chain, args_float[i], CallOperands[i]);
+ } else
+ assert(0 && "Unknown operand");
}
+
assert(CallOperands.size() <= 6 && "Too big a call");
Chain = CurDAG->getCopyToReg(Chain, Alpha::R27, Addr);
@@ -271,6 +350,14 @@ SDOperand AlphaDAGToDAGISel::SelectCALL(SDOperand Op) {
Chain = CurDAG->getCopyFromReg(Chain, Alpha::R0, MVT::i64).getValue(1);
CallResults.push_back(Chain.getValue(0));
break;
+ case MVT::f32:
+ Chain = CurDAG->getCopyFromReg(Chain, Alpha::F0, MVT::f32).getValue(1);
+ CallResults.push_back(Chain.getValue(0));
+ break;
+ case MVT::f64:
+ Chain = CurDAG->getCopyFromReg(Chain, Alpha::F0, MVT::f64).getValue(1);
+ CallResults.push_back(Chain.getValue(0));
+ break;
}
CallResults.push_back(Chain);
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2025-04-29 05:16:06 +0000