support for larger calls
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19932 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/Alpha/AlphaISelPattern.cpp b/lib/Target/Alpha/AlphaISelPattern.cpp
index ad49244..e49fdfb 100644
--- a/lib/Target/Alpha/AlphaISelPattern.cpp
+++ b/lib/Target/Alpha/AlphaISelPattern.cpp
@@ -27,6 +27,7 @@
#include "llvm/Support/MathExtras.h"
#include "llvm/ADT/Statistic.h"
#include <set>
+#include <algorithm>
using namespace llvm;
//===----------------------------------------------------------------------===//
@@ -138,34 +139,42 @@
for (Function::aiterator I = F.abegin(), E = F.aend(); I != E; ++I)
{
SDOperand newroot, argt;
- ++count;
- assert(count <= 6 && "More than 6 args not supported");
- switch (getValueType(I->getType())) {
- default: std::cerr << "Unknown Type " << getValueType(I->getType()) << "\n"; abort();
- case MVT::f64:
- case MVT::f32:
- BuildMI(&BB, Alpha::IDEF, 0, args_float[count - 1]);
- argVreg.push_back(MF.getSSARegMap()->createVirtualRegister(getRegClassFor(getValueType(I->getType()))));
- argPreg.push_back(args_float[count - 1]);
- argOpc.push_back(Alpha::CPYS);
- newroot = DAG.getCopyFromReg(argVreg[count-1], getValueType(I->getType()), DAG.getRoot());
- break;
- case MVT::i1:
- case MVT::i8:
- case MVT::i16:
- case MVT::i32:
- case MVT::i64:
- BuildMI(&BB, Alpha::IDEF, 0, args_int[count - 1]);
- argVreg.push_back(MF.getSSARegMap()->createVirtualRegister(getRegClassFor(MVT::i64)));
- argPreg.push_back(args_int[count - 1]);
- argOpc.push_back(Alpha::BIS);
- argt = newroot = DAG.getCopyFromReg(argVreg[count-1], MVT::i64, DAG.getRoot());
- if (getValueType(I->getType()) != MVT::i64)
- argt = DAG.getNode(ISD::TRUNCATE, getValueType(I->getType()), newroot);
- break;
+ if (count < 6) {
+ switch (getValueType(I->getType())) {
+ default: std::cerr << "Unknown Type " << getValueType(I->getType()) << "\n"; abort();
+ case MVT::f64:
+ case MVT::f32:
+ BuildMI(&BB, Alpha::IDEF, 0, args_float[count]);
+ argVreg.push_back(MF.getSSARegMap()->createVirtualRegister(getRegClassFor(getValueType(I->getType()))));
+ argPreg.push_back(args_float[count]);
+ argOpc.push_back(Alpha::CPYS);
+ newroot = DAG.getCopyFromReg(argVreg[count], getValueType(I->getType()), DAG.getRoot());
+ break;
+ case MVT::i1:
+ case MVT::i8:
+ case MVT::i16:
+ case MVT::i32:
+ case MVT::i64:
+ BuildMI(&BB, Alpha::IDEF, 0, args_int[count]);
+ argVreg.push_back(MF.getSSARegMap()->createVirtualRegister(getRegClassFor(MVT::i64)));
+ argPreg.push_back(args_int[count]);
+ argOpc.push_back(Alpha::BIS);
+ argt = newroot = DAG.getCopyFromReg(argVreg[count], MVT::i64, DAG.getRoot());
+ if (getValueType(I->getType()) != MVT::i64)
+ argt = DAG.getNode(ISD::TRUNCATE, getValueType(I->getType()), newroot);
+ break;
+ }
+ } else { //more args
+ // Create the frame index object for this incoming parameter...
+ int FI = MFI->CreateFixedObject(8, 8 * (count - 6));
+
+ // Create the SelectionDAG nodes corresponding to a load from this parameter
+ SDOperand FIN = DAG.getFrameIndex(FI, MVT::i64);
+ argt = newroot = DAG.getLoad(getValueType(I->getType()), DAG.getEntryNode(), FIN);
}
DAG.setRoot(newroot.getValue(1));
ArgValues.push_back(argt);
+ ++count;
}
BuildMI(&BB, Alpha::IDEF, 0, Alpha::R29);
@@ -181,6 +190,9 @@
const Type *RetTy, SDOperand Callee,
ArgListTy &Args, SelectionDAG &DAG) {
int NumBytes = 0;
+ if (Args.size() > 6)
+ NumBytes = (Args.size() - 6) * 8;
+
Chain = DAG.getNode(ISD::ADJCALLSTACKDOWN, MVT::Other, Chain,
DAG.getConstant(NumBytes, getPointerTy()));
std::vector<SDOperand> args_to_use;
@@ -404,9 +416,9 @@
//STL LDS
//STQ LDT
Opc = DestType == MVT::f64 ? Alpha::STQ : Alpha::STL;
- BuildMI(BB, Opc, 2).addReg(Tmp1).addFrameIndex(FrameIdx);
+ BuildMI(BB, Opc, 2).addReg(Tmp1).addFrameIndex(FrameIdx).addReg(Alpha::F31);
Opc = DestType == MVT::f64 ? Alpha::LDT : Alpha::LDS;
- BuildMI(BB, Opc, 1, Result).addFrameIndex(FrameIdx);
+ BuildMI(BB, Opc, 1, Result).addFrameIndex(FrameIdx).addReg(Alpha::F31);
//The easy way: doesn't work
// //so these instructions are not supported on ev56
@@ -467,7 +479,7 @@
case ISD::FrameIndex:
Tmp1 = cast<FrameIndexSDNode>(N)->getIndex();
- BuildMI(BB, Alpha::LDA, 2, Result).addFrameIndex(Tmp1);
+ BuildMI(BB, Alpha::LDA, 2, Result).addFrameIndex(Tmp1).addReg(Alpha::F31);
return Result;
case ISD::EXTLOAD:
@@ -576,32 +588,56 @@
for(int i = 2, e = Node->getNumOperands(); i < e; ++i)
argvregs.push_back(SelectExpr(N.getOperand(i)));
- for(int i = 0, e = argvregs.size(); i < e; ++i)
- {
- unsigned args_int[] = {Alpha::R16, Alpha::R17, Alpha::R18,
- Alpha::R19, Alpha::R20, Alpha::R21};
- unsigned args_float[] = {Alpha::F16, Alpha::F17, Alpha::F18,
- Alpha::F19, Alpha::F20, Alpha::F21};
- switch(N.getOperand(i+2).getValueType()) {
- default:
- Node->dump();
- N.getOperand(i).Val->dump();
- std::cerr << "Type for " << i << " is: " << N.getOperand(i+2).getValueType() << "\n";
- assert(0 && "Unknown value type for call");
- case MVT::i1:
- case MVT::i8:
- case MVT::i16:
- case MVT::i32:
- case MVT::i64:
- BuildMI(BB, Alpha::BIS, 2, args_int[i]).addReg(argvregs[i]).addReg(argvregs[i]);
- break;
- case MVT::f32:
- case MVT::f64:
- BuildMI(BB, Alpha::CPYS, 2, args_float[i]).addReg(argvregs[i]).addReg(argvregs[i]);
- break;
- }
-
- }
+ //in reg args
+ for(int i = 0, e = std::min(6, (int)argvregs.size()); i < e; ++i)
+ {
+ unsigned args_int[] = {Alpha::R16, Alpha::R17, Alpha::R18,
+ Alpha::R19, Alpha::R20, Alpha::R21};
+ unsigned args_float[] = {Alpha::F16, Alpha::F17, Alpha::F18,
+ Alpha::F19, Alpha::F20, Alpha::F21};
+ switch(N.getOperand(i+2).getValueType()) {
+ default:
+ Node->dump();
+ N.getOperand(i).Val->dump();
+ std::cerr << "Type for " << i << " is: " << N.getOperand(i+2).getValueType() << "\n";
+ assert(0 && "Unknown value type for call");
+ case MVT::i1:
+ case MVT::i8:
+ case MVT::i16:
+ case MVT::i32:
+ case MVT::i64:
+ BuildMI(BB, Alpha::BIS, 2, args_int[i]).addReg(argvregs[i]).addReg(argvregs[i]);
+ break;
+ case MVT::f32:
+ case MVT::f64:
+ BuildMI(BB, Alpha::CPYS, 2, args_float[i]).addReg(argvregs[i]).addReg(argvregs[i]);
+ break;
+ }
+ }
+ //in mem args
+ for (int i = 6, e = argvregs.size(); i < e; ++i)
+ {
+ switch(N.getOperand(i+2).getValueType()) {
+ default:
+ Node->dump();
+ N.getOperand(i).Val->dump();
+ std::cerr << "Type for " << i << " is: " << N.getOperand(i+2).getValueType() << "\n";
+ assert(0 && "Unknown value type for call");
+ case MVT::i1:
+ case MVT::i8:
+ case MVT::i16:
+ case MVT::i32:
+ case MVT::i64:
+ BuildMI(BB, Alpha::STQ, 3).addReg(argvregs[i]).addImm((i - 6) * 8).addReg(Alpha::R30);
+ break;
+ case MVT::f32:
+ BuildMI(BB, Alpha::STS, 3).addReg(argvregs[i]).addImm((i - 6) * 8).addReg(Alpha::R30);
+ break;
+ case MVT::f64:
+ BuildMI(BB, Alpha::STT, 3).addReg(argvregs[i]).addImm((i - 6) * 8).addReg(Alpha::R30);
+ break;
+ }
+ }
//build the right kind of call
if (GlobalAddressSDNode *GASD =
dyn_cast<GlobalAddressSDNode>(N.getOperand(1)))