Check in LLVM r95781.
diff --git a/lib/CodeGen/SelectionDAG/CallingConvLower.cpp b/lib/CodeGen/SelectionDAG/CallingConvLower.cpp
new file mode 100644
index 0000000..4e6c1fc
--- /dev/null
+++ b/lib/CodeGen/SelectionDAG/CallingConvLower.cpp
@@ -0,0 +1,179 @@
+//===-- CallingConvLower.cpp - Calling Conventions ------------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements the CCState class, used for lowering and implementing
+// calling conventions.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/CodeGen/CallingConvLower.h"
+#include "llvm/Support/Debug.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/raw_ostream.h"
+#include "llvm/Target/TargetRegisterInfo.h"
+#include "llvm/Target/TargetData.h"
+#include "llvm/Target/TargetMachine.h"
+using namespace llvm;
+
+CCState::CCState(CallingConv::ID CC, bool isVarArg, const TargetMachine &tm,
+ SmallVector<CCValAssign, 16> &locs, LLVMContext &C)
+ : CallingConv(CC), IsVarArg(isVarArg), TM(tm),
+ TRI(*TM.getRegisterInfo()), Locs(locs), Context(C) {
+ // No stack is used.
+ StackOffset = 0;
+
+ UsedRegs.resize((TRI.getNumRegs()+31)/32);
+}
+
+// HandleByVal - Allocate a stack slot large enough to pass an argument by
+// value. The size and alignment information of the argument is encoded in its
+// parameter attribute.
+void CCState::HandleByVal(unsigned ValNo, EVT ValVT,
+ EVT LocVT, CCValAssign::LocInfo LocInfo,
+ int MinSize, int MinAlign,
+ ISD::ArgFlagsTy ArgFlags) {
+ unsigned Align = ArgFlags.getByValAlign();
+ unsigned Size = ArgFlags.getByValSize();
+ if (MinSize > (int)Size)
+ Size = MinSize;
+ if (MinAlign > (int)Align)
+ Align = MinAlign;
+ unsigned Offset = AllocateStack(Size, Align);
+
+ addLoc(CCValAssign::getMem(ValNo, ValVT, Offset, LocVT, LocInfo));
+}
+
+/// MarkAllocated - Mark a register and all of its aliases as allocated.
+void CCState::MarkAllocated(unsigned Reg) {
+ UsedRegs[Reg/32] |= 1 << (Reg&31);
+
+ if (const unsigned *RegAliases = TRI.getAliasSet(Reg))
+ for (; (Reg = *RegAliases); ++RegAliases)
+ UsedRegs[Reg/32] |= 1 << (Reg&31);
+}
+
+/// AnalyzeFormalArguments - Analyze an array of argument values,
+/// incorporating info about the formals into this state.
+void
+CCState::AnalyzeFormalArguments(const SmallVectorImpl<ISD::InputArg> &Ins,
+ CCAssignFn Fn) {
+ unsigned NumArgs = Ins.size();
+
+ for (unsigned i = 0; i != NumArgs; ++i) {
+ EVT ArgVT = Ins[i].VT;
+ ISD::ArgFlagsTy ArgFlags = Ins[i].Flags;
+ if (Fn(i, ArgVT, ArgVT, CCValAssign::Full, ArgFlags, *this)) {
+#ifndef NDEBUG
+ dbgs() << "Formal argument #" << i << " has unhandled type "
+ << ArgVT.getEVTString();
+#endif
+ llvm_unreachable(0);
+ }
+ }
+}
+
+/// CheckReturn - Analyze the return values of a function, returning true if
+/// the return can be performed without sret-demotion, and false otherwise.
+bool CCState::CheckReturn(const SmallVectorImpl<EVT> &OutTys,
+ const SmallVectorImpl<ISD::ArgFlagsTy> &ArgsFlags,
+ CCAssignFn Fn) {
+ // Determine which register each value should be copied into.
+ for (unsigned i = 0, e = OutTys.size(); i != e; ++i) {
+ EVT VT = OutTys[i];
+ ISD::ArgFlagsTy ArgFlags = ArgsFlags[i];
+ if (Fn(i, VT, VT, CCValAssign::Full, ArgFlags, *this))
+ return false;
+ }
+ return true;
+}
+
+/// AnalyzeReturn - Analyze the returned values of a return,
+/// incorporating info about the result values into this state.
+void CCState::AnalyzeReturn(const SmallVectorImpl<ISD::OutputArg> &Outs,
+ CCAssignFn Fn) {
+ // Determine which register each value should be copied into.
+ for (unsigned i = 0, e = Outs.size(); i != e; ++i) {
+ EVT VT = Outs[i].Val.getValueType();
+ ISD::ArgFlagsTy ArgFlags = Outs[i].Flags;
+ if (Fn(i, VT, VT, CCValAssign::Full, ArgFlags, *this)) {
+#ifndef NDEBUG
+ dbgs() << "Return operand #" << i << " has unhandled type "
+ << VT.getEVTString();
+#endif
+ llvm_unreachable(0);
+ }
+ }
+}
+
+
+/// AnalyzeCallOperands - Analyze the outgoing arguments to a call,
+/// incorporating info about the passed values into this state.
+void CCState::AnalyzeCallOperands(const SmallVectorImpl<ISD::OutputArg> &Outs,
+ CCAssignFn Fn) {
+ unsigned NumOps = Outs.size();
+ for (unsigned i = 0; i != NumOps; ++i) {
+ EVT ArgVT = Outs[i].Val.getValueType();
+ ISD::ArgFlagsTy ArgFlags = Outs[i].Flags;
+ if (Fn(i, ArgVT, ArgVT, CCValAssign::Full, ArgFlags, *this)) {
+#ifndef NDEBUG
+ dbgs() << "Call operand #" << i << " has unhandled type "
+ << ArgVT.getEVTString();
+#endif
+ llvm_unreachable(0);
+ }
+ }
+}
+
+/// AnalyzeCallOperands - Same as above except it takes vectors of types
+/// and argument flags.
+void CCState::AnalyzeCallOperands(SmallVectorImpl<EVT> &ArgVTs,
+ SmallVectorImpl<ISD::ArgFlagsTy> &Flags,
+ CCAssignFn Fn) {
+ unsigned NumOps = ArgVTs.size();
+ for (unsigned i = 0; i != NumOps; ++i) {
+ EVT ArgVT = ArgVTs[i];
+ ISD::ArgFlagsTy ArgFlags = Flags[i];
+ if (Fn(i, ArgVT, ArgVT, CCValAssign::Full, ArgFlags, *this)) {
+#ifndef NDEBUG
+ dbgs() << "Call operand #" << i << " has unhandled type "
+ << ArgVT.getEVTString();
+#endif
+ llvm_unreachable(0);
+ }
+ }
+}
+
+/// AnalyzeCallResult - Analyze the return values of a call,
+/// incorporating info about the passed values into this state.
+void CCState::AnalyzeCallResult(const SmallVectorImpl<ISD::InputArg> &Ins,
+ CCAssignFn Fn) {
+ for (unsigned i = 0, e = Ins.size(); i != e; ++i) {
+ EVT VT = Ins[i].VT;
+ ISD::ArgFlagsTy Flags = Ins[i].Flags;
+ if (Fn(i, VT, VT, CCValAssign::Full, Flags, *this)) {
+#ifndef NDEBUG
+ dbgs() << "Call result #" << i << " has unhandled type "
+ << VT.getEVTString();
+#endif
+ llvm_unreachable(0);
+ }
+ }
+}
+
+/// AnalyzeCallResult - Same as above except it's specialized for calls which
+/// produce a single value.
+void CCState::AnalyzeCallResult(EVT VT, CCAssignFn Fn) {
+ if (Fn(0, VT, VT, CCValAssign::Full, ISD::ArgFlagsTy(), *this)) {
+#ifndef NDEBUG
+ dbgs() << "Call result has unhandled type "
+ << VT.getEVTString();
+#endif
+ llvm_unreachable(0);
+ }
+}