Fix a ton of comment typos found by codespell. Patch by

[oota-llvm.git] / lib / Target / Mips / MipsISelLowering.cpp

diff --git a/lib/Target/Mips/MipsISelLowering.cpp b/lib/Target/Mips/MipsISelLowering.cpp
index 59ad81b5a7e77c0eb50b8eaa709781c88ecea181..7baaa0f4d0d1050b20998cebb7be97edf3ff7054 100644 (file)
--- a/lib/Target/Mips/MipsISelLowering.cpp
+++ b/lib/Target/Mips/MipsISelLowering.cpp
@@ -723,7 +723,7 @@ LowerBRCOND(SDValue Op, SelectionDAG &DAG) const
 
   SDValue CondRes = CreateFPCmp(DAG, Op.getOperand(1));
 
-  // Return if flag is not set by a floating point comparision.
+  // Return if flag is not set by a floating point comparison.
   if (CondRes.getOpcode() != MipsISD::FPCmp)
     return Op;
 
@@ -741,7 +741,7 @@ LowerSELECT(SDValue Op, SelectionDAG &DAG) const
 {
   SDValue Cond = CreateFPCmp(DAG, Op.getOperand(0));
 
-  // Return if flag is not set by a floating point comparision.
+  // Return if flag is not set by a floating point comparison.
   if (Cond.getOpcode() != MipsISD::FPCmp)
     return Op;
 
@@ -784,7 +784,8 @@ SDValue MipsTargetLowering::LowerGlobalAddress(SDValue Op,
                                   false, false, 0);
     // On functions and global targets not internal linked only
     // a load from got/GP is necessary for PIC to work.
-    if (!GV->hasLocalLinkage() || isa<Function>(GV))
+    if (!GV->hasInternalLinkage() &&
+        (!GV->hasLocalLinkage() || isa<Function>(GV)))
       return ResNode;
     SDValue GALo = DAG.getTargetGlobalAddress(GV, dl, MVT::i32, 0,
                                               MipsII::MO_ABS_LO);
@@ -866,7 +867,7 @@ LowerConstantPool(SDValue Op, SelectionDAG &DAG) const
 
   // gp_rel relocation
   // FIXME: we should reference the constant pool using small data sections,
-  // but the asm printer currently doens't support this feature without
+  // but the asm printer currently doesn't support this feature without
   // hacking it. This feature should come soon so we can uncomment the
   // stuff below.
   //if (IsInSmallSection(C->getType())) {
@@ -1188,7 +1189,7 @@ MipsTargetLowering::LowerCall(SDValue Chain, SDValue Callee,
 
   // Build a sequence of copy-to-reg nodes chained together with token
   // chain and flag operands which copy the outgoing args into registers.
-  // The InFlag in necessary since all emited instructions must be
+  // The InFlag in necessary since all emitted instructions must be
   // stuck together.
   SDValue InFlag;
   for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i) {
@@ -1201,12 +1202,52 @@ MipsTargetLowering::LowerCall(SDValue Chain, SDValue Callee,
   // direct call is) turn it into a TargetGlobalAddress/TargetExternalSymbol
   // node so that legalize doesn't hack it.
   unsigned char OpFlag = IsPIC ? MipsII::MO_GOT_CALL : MipsII::MO_NO_FLAG;
-  if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee))
-    Callee = DAG.getTargetGlobalAddress(G->getGlobal(), dl,
-                                getPointerTy(), 0, OpFlag);
-  else if (ExternalSymbolSDNode *S = dyn_cast<ExternalSymbolSDNode>(Callee))
+  bool LoadSymAddr = false;
+  SDValue CalleeLo;
+
+  if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee)) {
+    if (IsPIC && G->getGlobal()->hasInternalLinkage()) {
+      Callee = DAG.getTargetGlobalAddress(G->getGlobal(), dl,
+                                          getPointerTy(), 0,MipsII:: MO_GOT);
+      CalleeLo = DAG.getTargetGlobalAddress(G->getGlobal(), dl, getPointerTy(),
+                                            0, MipsII::MO_ABS_LO);
+    } else {
+      Callee = DAG.getTargetGlobalAddress(G->getGlobal(), dl,
+                                          getPointerTy(), 0, OpFlag);
+    }
+
+    LoadSymAddr = true;
+  }
+  else if (ExternalSymbolSDNode *S = dyn_cast<ExternalSymbolSDNode>(Callee)) {
     Callee = DAG.getTargetExternalSymbol(S->getSymbol(),
                                 getPointerTy(), OpFlag);
+    LoadSymAddr = true;
+  }
+
+  // Create nodes that load address of callee and copy it to T9
+  if (IsPIC) {
+    if (LoadSymAddr) {
+      // Load callee address
+      SDValue LoadValue = DAG.getLoad(MVT::i32, dl, Chain, Callee,
+                                      MachinePointerInfo::getGOT(),
+                                      false, false, 0);
+
+      // Use GOT+LO if callee has internal linkage.
+      if (CalleeLo.getNode()) {
+        SDValue Lo = DAG.getNode(MipsISD::Lo, dl, MVT::i32, CalleeLo);
+        Callee = DAG.getNode(ISD::ADD, dl, MVT::i32, LoadValue, Lo);
+      } else
+        Callee = LoadValue;
+
+      // Use chain output from LoadValue 
+      Chain = LoadValue.getValue(1);
+    }
+
+    // copy to T9
+    Chain = DAG.getCopyToReg(Chain, dl, Mips::T9, Callee, SDValue(0, 0));
+    InFlag = Chain.getValue(1);
+    Callee = DAG.getRegister(Mips::T9, MVT::i32);
+  }
 
   // MipsJmpLink = #chain, #target_address, #opt_in_flags...
   //             = Chain, Callee, Reg#1, Reg#2, ...
@@ -1231,7 +1272,7 @@ MipsTargetLowering::LowerCall(SDValue Chain, SDValue Callee,
 
   // Create a stack location to hold GP when PIC is used. This stack
   // location is used on function prologue to save GP and also after all
-  // emited CALL's to restore GP.
+  // emitted CALL's to restore GP.
   if (IsPIC) {
       // Function can have an arbitrary number of calls, so
       // hold the LastArgStackLoc with the biggest offset.