First version of code to handle loads. Stub function for handling stores.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12758 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 78 insertions, 2 deletions

diff --git a/lib/Target/Sparc/InstSelectSimple.cpp b/lib/Target/Sparc/InstSelectSimple.cpp
index 23dfeff..f8b8a88 100644
--- a/lib/Target/Sparc/InstSelectSimple.cpp
+++ b/lib/Target/Sparc/InstSelectSimple.cpp
@@ -61,7 +61,9 @@ namespace {
     void visitShiftInstruction(Instruction &I) { visitBinaryOperator(I); }
     void visitSetCondInst(Instruction &I);
     void visitCallInst(CallInst &I);
-    void visitReturnInst(ReturnInst &RI);
+    void visitReturnInst(ReturnInst &I);
+    void visitLoadInst(LoadInst &I);
+    void visitStoreInst(StoreInst &I);
 
     void visitInstruction(Instruction &I) {
       std::cerr << "Unhandled instruction: " << I;
@@ -280,6 +282,42 @@ bool V8ISel::runOnFunction(Function &Fn) {
   return true;
 }
 
+void V8ISel::visitLoadInst(LoadInst &I) {
+  unsigned DestReg = getReg (I);
+  unsigned PtrReg = getReg (I.getOperand (0));
+  switch (getClass (I.getType ())) {
+   case cByte:
+    if (I.getType ()->isSigned ())
+      BuildMI (BB, V8::LDSBmr, 1, DestReg).addReg (PtrReg).addSImm(0);
+    else
+      BuildMI (BB, V8::LDUBmr, 1, DestReg).addReg (PtrReg).addSImm(0);
+    return;
+   case cShort:
+    if (I.getType ()->isSigned ())
+      BuildMI (BB, V8::LDSHmr, 1, DestReg).addReg (PtrReg).addSImm(0);
+    else
+      BuildMI (BB, V8::LDUHmr, 1, DestReg).addReg (PtrReg).addSImm(0);
+    return;
+   case cInt:
+    BuildMI (BB, V8::LDmr, 1, DestReg).addReg (PtrReg).addSImm(0);
+    return;
+   case cLong:
+    BuildMI (BB, V8::LDDmr, 1, DestReg).addReg (PtrReg).addSImm(0);
+    return;
+   default:
+    std::cerr << "Load instruction not handled: " << I;
+    abort ();
+    return;
+  }
+}
+
+void V8ISel::visitStoreInst(StoreInst &I) {
+  unsigned SrcReg = getReg (I.getOperand (0));
+  unsigned PtrReg = getReg (I.getOperand (1));
+  std::cerr << "Store instruction not handled: " << I;
+  abort ();
+}
+
 void V8ISel::visitCallInst(CallInst &I) {
   assert (I.getNumOperands () < 8
           && "Can't handle pushing excess call args on the stack yet");
diff --git a/lib/Target/Sparc/SparcV8ISelSimple.cpp b/lib/Target/Sparc/SparcV8ISelSimple.cpp
index 23dfeff..f8b8a88 100644
--- a/lib/Target/Sparc/SparcV8ISelSimple.cpp
+++ b/lib/Target/Sparc/SparcV8ISelSimple.cpp
@@ -61,7 +61,9 @@ namespace {
     void visitShiftInstruction(Instruction &I) { visitBinaryOperator(I); }
     void visitSetCondInst(Instruction &I);
     void visitCallInst(CallInst &I);
-    void visitReturnInst(ReturnInst &RI);
+    void visitReturnInst(ReturnInst &I);
+    void visitLoadInst(LoadInst &I);
+    void visitStoreInst(StoreInst &I);
 
     void visitInstruction(Instruction &I) {
       std::cerr << "Unhandled instruction: " << I;
@@ -280,6 +282,42 @@ bool V8ISel::runOnFunction(Function &Fn) {
   return true;
 }
 
+void V8ISel::visitLoadInst(LoadInst &I) {
+  unsigned DestReg = getReg (I);
+  unsigned PtrReg = getReg (I.getOperand (0));
+  switch (getClass (I.getType ())) {
+   case cByte:
+    if (I.getType ()->isSigned ())
+      BuildMI (BB, V8::LDSBmr, 1, DestReg).addReg (PtrReg).addSImm(0);
+    else
+      BuildMI (BB, V8::LDUBmr, 1, DestReg).addReg (PtrReg).addSImm(0);
+    return;
+   case cShort:
+    if (I.getType ()->isSigned ())
+      BuildMI (BB, V8::LDSHmr, 1, DestReg).addReg (PtrReg).addSImm(0);
+    else
+      BuildMI (BB, V8::LDUHmr, 1, DestReg).addReg (PtrReg).addSImm(0);
+    return;
+   case cInt:
+    BuildMI (BB, V8::LDmr, 1, DestReg).addReg (PtrReg).addSImm(0);
+    return;
+   case cLong:
+    BuildMI (BB, V8::LDDmr, 1, DestReg).addReg (PtrReg).addSImm(0);
+    return;
+   default:
+    std::cerr << "Load instruction not handled: " << I;
+    abort ();
+    return;
+  }
+}
+
+void V8ISel::visitStoreInst(StoreInst &I) {
+  unsigned SrcReg = getReg (I.getOperand (0));
+  unsigned PtrReg = getReg (I.getOperand (1));
+  std::cerr << "Store instruction not handled: " << I;
+  abort ();
+}
+
 void V8ISel::visitCallInst(CallInst &I) {
   assert (I.getNumOperands () < 8
           && "Can't handle pushing excess call args on the stack yet");