Add an isTailCall flag to LowerCallTo
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21958 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/Alpha/AlphaISelPattern.cpp b/lib/Target/Alpha/AlphaISelPattern.cpp
index 9a9e587..28930ce 100644
--- a/lib/Target/Alpha/AlphaISelPattern.cpp
+++ b/lib/Target/Alpha/AlphaISelPattern.cpp
@@ -119,7 +119,8 @@
/// actual call.
virtual std::pair<SDOperand, SDOperand>
LowerCallTo(SDOperand Chain, const Type *RetTy, bool isVarArg, unsigned CC,
- SDOperand Callee, ArgListTy &Args, SelectionDAG &DAG);
+ bool isTailCall, SDOperand Callee, ArgListTy &Args,
+ SelectionDAG &DAG);
virtual std::pair<SDOperand, SDOperand>
LowerVAStart(SDOperand Chain, SelectionDAG &DAG);
@@ -304,7 +305,7 @@
std::pair<SDOperand, SDOperand>
AlphaTargetLowering::LowerCallTo(SDOperand Chain,
const Type *RetTy, bool isVarArg,
- unsigned CallingConv,
+ unsigned CallingConv, bool isTailCall,
SDOperand Callee, ArgListTy &Args,
SelectionDAG &DAG) {
int NumBytes = 0;
diff --git a/lib/Target/IA64/IA64ISelPattern.cpp b/lib/Target/IA64/IA64ISelPattern.cpp
index 2005632..f4c50c0 100644
--- a/lib/Target/IA64/IA64ISelPattern.cpp
+++ b/lib/Target/IA64/IA64ISelPattern.cpp
@@ -110,7 +110,8 @@
/// actual call.
virtual std::pair<SDOperand, SDOperand>
LowerCallTo(SDOperand Chain, const Type *RetTy, bool isVarArg, unsigned CC,
- SDOperand Callee, ArgListTy &Args, SelectionDAG &DAG);
+ bool isTailCall, SDOperand Callee, ArgListTy &Args,
+ SelectionDAG &DAG);
virtual std::pair<SDOperand, SDOperand>
LowerVAStart(SDOperand Chain, SelectionDAG &DAG);
@@ -310,7 +311,7 @@
std::pair<SDOperand, SDOperand>
IA64TargetLowering::LowerCallTo(SDOperand Chain,
const Type *RetTy, bool isVarArg,
- unsigned CallingConv,
+ unsigned CallingConv, bool isTailCall,
SDOperand Callee, ArgListTy &Args,
SelectionDAG &DAG) {
diff --git a/lib/Target/PowerPC/PPC64ISelPattern.cpp b/lib/Target/PowerPC/PPC64ISelPattern.cpp
index cfc8a54..ce74c58 100644
--- a/lib/Target/PowerPC/PPC64ISelPattern.cpp
+++ b/lib/Target/PowerPC/PPC64ISelPattern.cpp
@@ -94,7 +94,8 @@
/// actual call.
virtual std::pair<SDOperand, SDOperand>
LowerCallTo(SDOperand Chain, const Type *RetTy, bool isVarArg, unsigned CC,
- SDOperand Callee, ArgListTy &Args, SelectionDAG &DAG);
+ bool isTailCall, SDOperand Callee, ArgListTy &Args,
+ SelectionDAG &DAG);
virtual std::pair<SDOperand, SDOperand>
LowerVAStart(SDOperand Chain, SelectionDAG &DAG);
@@ -237,7 +238,7 @@
std::pair<SDOperand, SDOperand>
PPC64TargetLowering::LowerCallTo(SDOperand Chain,
const Type *RetTy, bool isVarArg,
- unsigned CallingConv,
+ unsigned CallingConv, bool isTailCall,
SDOperand Callee, ArgListTy &Args,
SelectionDAG &DAG) {
// args_to_use will accumulate outgoing args for the ISD::CALL case in
diff --git a/lib/Target/PowerPC/PPCISelPattern.cpp b/lib/Target/PowerPC/PPCISelPattern.cpp
index 8a0f27b..4eeaa24 100644
--- a/lib/Target/PowerPC/PPCISelPattern.cpp
+++ b/lib/Target/PowerPC/PPCISelPattern.cpp
@@ -94,7 +94,8 @@
/// actual call.
virtual std::pair<SDOperand, SDOperand>
LowerCallTo(SDOperand Chain, const Type *RetTy, bool isVarArg, unsigned CC,
- SDOperand Callee, ArgListTy &Args, SelectionDAG &DAG);
+ bool isTailCall, SDOperand Callee, ArgListTy &Args,
+ SelectionDAG &DAG);
virtual std::pair<SDOperand, SDOperand>
LowerVAStart(SDOperand Chain, SelectionDAG &DAG);
@@ -281,7 +282,7 @@
std::pair<SDOperand, SDOperand>
PPC32TargetLowering::LowerCallTo(SDOperand Chain,
const Type *RetTy, bool isVarArg,
- unsigned CallingConv,
+ unsigned CallingConv, bool isTailCall,
SDOperand Callee, ArgListTy &Args,
SelectionDAG &DAG) {
// args_to_use will accumulate outgoing args for the ISD::CALL case in
diff --git a/lib/Target/X86/X86ISelPattern.cpp b/lib/Target/X86/X86ISelPattern.cpp
index a8e8881..cadc742 100644
--- a/lib/Target/X86/X86ISelPattern.cpp
+++ b/lib/Target/X86/X86ISelPattern.cpp
@@ -45,6 +45,7 @@
class X86TargetLowering : public TargetLowering {
int VarArgsFrameIndex; // FrameIndex for start of varargs area.
int ReturnAddrIndex; // FrameIndex for return slot.
+ int BytesToPopOnReturn; // Number of bytes ret should pop.
public:
X86TargetLowering(TargetMachine &TM) : TargetLowering(TM) {
// Set up the TargetLowering object.
@@ -117,7 +118,8 @@
/// actual call.
virtual std::pair<SDOperand, SDOperand>
LowerCallTo(SDOperand Chain, const Type *RetTy, bool isVarArg, unsigned CC,
- SDOperand Callee, ArgListTy &Args, SelectionDAG &DAG);
+ bool isTailCall, SDOperand Callee, ArgListTy &Args,
+ SelectionDAG &DAG);
virtual std::pair<SDOperand, SDOperand>
LowerVAStart(SDOperand Chain, SelectionDAG &DAG);
@@ -154,6 +156,7 @@
std::pair<SDOperand, SDOperand>
X86TargetLowering::LowerCallTo(SDOperand Chain, const Type *RetTy,
bool isVarArg, unsigned CallingConv,
+ bool isTailCall,
SDOperand Callee, ArgListTy &Args,
SelectionDAG &DAG) {
assert((!isVarArg || CallingConv == CallingConv::C) &&
@@ -330,7 +333,8 @@
SDOperand TheCall = SDOperand(DAG.getCall(RetVals, Chain, Callee), 0);
Chain = TheCall.getValue(RetTyVT != MVT::isVoid);
Chain = DAG.getNode(ISD::CALLSEQ_END, MVT::Other, Chain,
- DAG.getConstant(NumBytes, getPointerTy()));
+ DAG.getConstant(NumBytes, getPointerTy()),
+ DAG.getConstant(0, getPointerTy()));
return std::make_pair(TheCall, Chain);
}
@@ -669,7 +673,9 @@
RegValuesToPass), 0);
Chain = TheCall.getValue(RetTyVT != MVT::isVoid);
Chain = DAG.getNode(ISD::CALLSEQ_END, MVT::Other, Chain,
- DAG.getConstant(NumBytes, getPointerTy()));
+ DAG.getConstant(NumBytes, getPointerTy()),
+ // The callee pops the arguments off the stack.
+ DAG.getConstant(ArgOffset, getPointerTy()));
return std::make_pair(TheCall, Chain);
}