commit 3f5aa1cd8c8aed26b7feaac6ce7c12e891daa1a2
author Andrew Lenharth <andrewl@lenharth.org> Thu Jun 23 23:42:05 2005 +0000
committer Andrew Lenharth <andrewl@lenharth.org> Thu Jun 23 23:42:05 2005 +0000
tree 77f4021634489e1c83f377deb2c24ec4d537c2c9
parent a9e39e28b79d47d2a6e612e84cd85057cd590bac

remove a pseudo instruction, make ret always right, and fix vararg chains


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22276 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Target/Alpha/AlphaISelPattern.cpp

diff --git a/lib/Target/Alpha/AlphaISelPattern.cpp b/lib/Target/Alpha/AlphaISelPattern.cpp
index 1fd03d3..32c3bfa 100644
--- a/lib/Target/Alpha/AlphaISelPattern.cpp
+++ b/lib/Target/Alpha/AlphaISelPattern.cpp
@@ -76,6 +76,7 @@
     int VarArgsOffset;  // What is the offset to the first vaarg
     int VarArgsBase;    // What is the base FrameIndex
     unsigned GP; //GOT vreg
+    unsigned RA; //Return Address
   public:
     AlphaTargetLowering(TargetMachine &TM) : TargetLowering(TM) {
       // Set up the TargetLowering object.
@@ -171,6 +172,11 @@
     {
       BuildMI(BB, Alpha::BIS, 2, Alpha::R29).addReg(GP).addReg(GP);
     }
+    void restoreRA(MachineBasicBlock* BB)
+    {
+      BuildMI(BB, Alpha::BIS, 2, Alpha::R26).addReg(RA).addReg(RA);
+    }
+
   };
 }
 
@@ -262,6 +268,7 @@
   int count = 0;
 
   GP = AddLiveIn(MF, Alpha::R29, getRegClassFor(MVT::i64));
+  RA = AddLiveIn(MF, Alpha::R26, getRegClassFor(MVT::i64));
 
   for (Function::arg_iterator I = F.arg_begin(), E = F.arg_end(); I != E; ++I)
   {
@@ -418,7 +425,7 @@
   SDOperand Base = DAG.getLoad(MVT::i64, Chain, VAList, DAG.getSrcValue(NULL));
   SDOperand Tmp = DAG.getNode(ISD::ADD, MVT::i64, VAList, 
                               DAG.getConstant(8, MVT::i64));
-  SDOperand Offset = DAG.getNode(ISD::SEXTLOAD, MVT::i64, Chain, Tmp, 
+  SDOperand Offset = DAG.getNode(ISD::SEXTLOAD, MVT::i64, Base.getValue(1), Tmp, 
                                  DAG.getSrcValue(NULL), MVT::i32);
   SDOperand DataPtr = DAG.getNode(ISD::ADD, MVT::i64, Base, Offset);
   if (ArgTy->isFloatingPoint())
@@ -433,18 +440,18 @@
 
   SDOperand Result;
   if (ArgTy == Type::IntTy)
-    Result = DAG.getNode(ISD::SEXTLOAD, MVT::i64, Chain, DataPtr, 
+    Result = DAG.getNode(ISD::SEXTLOAD, MVT::i64, Offset.getValue(1), DataPtr, 
                          DAG.getSrcValue(NULL), MVT::i32);
   else if (ArgTy == Type::UIntTy)
-    Result = DAG.getNode(ISD::ZEXTLOAD, MVT::i64, Chain, DataPtr, 
+    Result = DAG.getNode(ISD::ZEXTLOAD, MVT::i64, Offset.getValue(1), DataPtr, 
                          DAG.getSrcValue(NULL), MVT::i32);
   else
-    Result = DAG.getLoad(getValueType(ArgTy), Chain, DataPtr, 
+    Result = DAG.getLoad(getValueType(ArgTy), Offset.getValue(1), DataPtr, 
                          DAG.getSrcValue(NULL));
 
   SDOperand NewOffset = DAG.getNode(ISD::ADD, MVT::i64, Offset, 
                                     DAG.getConstant(8, MVT::i64));
-  SDOperand Update = DAG.getNode(ISD::TRUNCSTORE, MVT::Other, Result, NewOffset, 
+  SDOperand Update = DAG.getNode(ISD::TRUNCSTORE, MVT::Other, Result.getValue(1), NewOffset, 
                                  Tmp, DAG.getSrcValue(NULL), MVT::i32);
   Result = DAG.getNode(ISD::TRUNCATE, getValueType(ArgTy), Result);
 
@@ -460,10 +467,12 @@
                                  Val, Dest, DAG.getSrcValue(NULL));
   SDOperand NP = DAG.getNode(ISD::ADD, MVT::i64, Src, 
                              DAG.getConstant(8, MVT::i64));
-  Val = DAG.getNode(ISD::SEXTLOAD, MVT::i64, Chain, NP, DAG.getSrcValue(NULL), 
+  Val = DAG.getNode(ISD::SEXTLOAD, MVT::i64, Result, NP, DAG.getSrcValue(NULL), 
                     MVT::i32);
+  SDOperand NPD = DAG.getNode(ISD::ADD, MVT::i64, Dest, 
+                             DAG.getConstant(8, MVT::i64));
   Result = DAG.getNode(ISD::TRUNCSTORE, MVT::Other, Val.getValue(1),
-                       Val, Dest, DAG.getSrcValue(NULL), MVT::i32);
+                       Val, NPD, DAG.getSrcValue(NULL), MVT::i32);
   return std::make_pair(Result, Result);
 }
 
@@ -2388,9 +2397,8 @@
       Select(N.getOperand(0));
       break;
     }
-    //Tmp2 = AlphaLowering.getRetAddr();
-    //BuildMI(BB, Alpha::BIS, 2, Alpha::R26).addReg(Tmp2).addReg(Tmp2);
-    BuildMI(BB, Alpha::RETURN, 0); // Just emit a 'ret' instruction
+    AlphaLowering.restoreRA(BB);
+    BuildMI(BB, Alpha::RET, 1, Alpha::R31).addReg(Alpha::R26); // Just emit a 'ret' instruction
     return;
 
   case ISD::TRUNCSTORE: