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move some code around, pass in calling conv, even though it is unused

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34585 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2007-02-25 08:29:00 +00:00
parent 753d9cb50e
commit 2b02a4409f
1 changed files with 46 additions and 39 deletions
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85
lib/Target/X86/X86ISelLowering.cpp
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@ -423,6 +423,50 @@ X86TargetLowering::X86TargetLowering(TargetMachine &TM)
allowUnalignedMemoryAccesses = true; // x86 supports it!
}
//===----------------------------------------------------------------------===//
// Return Value Calling Convention Implementation
//===----------------------------------------------------------------------===//
/// GetRetValueLocs - If we are returning a set of values with the specified
/// value types, determine the set of registers each one will land in. This
/// sets one element of the ResultRegs array for each element in the VTs array.
static void GetRetValueLocs(const MVT::ValueType *VTs, unsigned NumVTs,
unsigned *ResultRegs,
const X86Subtarget *Subtarget,
unsigned CallingConv) {
if (NumVTs == 0) return;
if (NumVTs == 2) {
ResultRegs[0] = VTs[0] == MVT::i64 ? X86::RAX : X86::EAX;
ResultRegs[1] = VTs[1] == MVT::i64 ? X86::RDX : X86::EDX;
return;
}
// Otherwise, NumVTs is 1.
MVT::ValueType ArgVT = VTs[0];
if (MVT::isVector(ArgVT)) // Integer or FP vector result -> XMM0.
ResultRegs[0] = X86::XMM0;
else if (MVT::isFloatingPoint(ArgVT) && Subtarget->is64Bit())
// FP values in X86-64 go in XMM0.
ResultRegs[0] = X86::XMM0;
else if (MVT::isFloatingPoint(ArgVT))
// FP values in X86-32 go in ST0.
ResultRegs[0] = X86::ST0;
else {
assert(MVT::isInteger(ArgVT) && "Unknown return value type!");
// Integer result -> EAX / RAX.
// The C calling convention guarantees the return value has been
// promoted to at least MVT::i32. The X86-64 ABI doesn't require the
// value to be promoted MVT::i64. So we don't have to extend it to
// 64-bit.
ResultRegs[0] = (ArgVT == MVT::i64) ? X86::RAX : X86::EAX;
}
}
//===----------------------------------------------------------------------===//
// C & StdCall Calling Convention implementation
//===----------------------------------------------------------------------===//
@ -3915,44 +3959,6 @@ SDOperand X86TargetLowering::LowerCALL(SDOperand Op, SelectionDAG &DAG) {
}
}
/// GetRetValueLocs - If we are returning a set of values with the specified
/// value types, determine the set of registers each one will land in. This
/// sets one element of the ResultRegs array for each element in the VTs array.
static void GetRetValueLocs(const MVT::ValueType *VTs, unsigned NumVTs,
unsigned *ResultRegs,
const X86Subtarget *Subtarget) {
if (NumVTs == 0) return;
if (NumVTs == 2) {
ResultRegs[0] = VTs[0] == MVT::i64 ? X86::RAX : X86::EAX;
ResultRegs[1] = VTs[1] == MVT::i64 ? X86::RDX : X86::EDX;
return;
}
// Otherwise, NumVTs is 1.
MVT::ValueType ArgVT = VTs[0];
if (MVT::isVector(ArgVT)) // Integer or FP vector result -> XMM0.
ResultRegs[0] = X86::XMM0;
else if (MVT::isFloatingPoint(ArgVT) && Subtarget->is64Bit())
// FP values in X86-64 go in XMM0.
ResultRegs[0] = X86::XMM0;
else if (MVT::isFloatingPoint(ArgVT))
// FP values in X86-32 go in ST0.
ResultRegs[0] = X86::ST0;
else {
assert(MVT::isInteger(ArgVT) && "Unknown return value type!");
// Integer result -> EAX / RAX.
// The C calling convention guarantees the return value has been
// promoted to at least MVT::i32. The X86-64 ABI doesn't require the
// value to be promoted MVT::i64. So we don't have to extend it to
// 64-bit.
ResultRegs[0] = (ArgVT == MVT::i64) ? X86::RAX : X86::EAX;
}
}
SDOperand X86TargetLowering::LowerRET(SDOperand Op, SelectionDAG &DAG) {
assert((Op.getNumOperands() & 1) == 1 && "ISD::RET should have odd # args");
@ -3966,7 +3972,8 @@ SDOperand X86TargetLowering::LowerRET(SDOperand Op, SelectionDAG &DAG) {
VTs[i] = Op.getOperand(i*2+1).getValueType();
// Determine which register each value should be copied into.
GetRetValueLocs(VTs, NumRegs, DestRegs, Subtarget);
GetRetValueLocs(VTs, NumRegs, DestRegs, Subtarget,
DAG.getMachineFunction().getFunction()->getCallingConv());
// If this is the first return lowered for this function, add the regs to the
// liveout set for the function.