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Added methods to record SPOffsets from LowerFORMAL_ARGUMENTS
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41525 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -14,7 +14,9 @@
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#ifndef MIPS_MACHINE_FUNCTION_INFO_H
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#define MIPS_MACHINE_FUNCTION_INFO_H
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#include "llvm/ADT/VectorExtras.h"
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#include "llvm/CodeGen/MachineFunction.h"
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#include "llvm/CodeGen/MachineFrameInfo.h"
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namespace llvm {
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@ -31,9 +33,34 @@ private:
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/// the Return Address must be saved
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int RAStackOffset;
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/// MipsFIHolder - Holds a FrameIndex and it's Stack Pointer Offset
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struct MipsFIHolder {
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int FI;
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int SPOffset;
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MipsFIHolder(int FrameIndex, int StackPointerOffset)
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: FI(FrameIndex), SPOffset(StackPointerOffset) {}
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};
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// On LowerFORMAL_ARGUMENTS the stack size is unknown,
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// so the Stack Pointer Offset calculation of "not in
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// register arguments" must be postponed to emitPrologue.
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SmallVector<MipsFIHolder, 16> FnLoadArgs;
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bool HasLoadArgs;
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// When VarArgs, we must write registers back to caller
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// stack, preserving on register arguments. Since the
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// stack size is unknown on LowerFORMAL_ARGUMENTS,
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// the Stack Pointer Offset calculation must be
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// postponed to emitPrologue.
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SmallVector<MipsFIHolder, 4> FnStoreVarArgs;
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bool HasStoreVarArgs;
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public:
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MipsFunctionInfo(MachineFunction& MF)
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: FPStackOffset(0), RAStackOffset(0)
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: FPStackOffset(0), RAStackOffset(0),
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HasLoadArgs(false), HasStoreVarArgs(false)
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{}
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int getFPStackOffset() const { return FPStackOffset; }
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@ -46,9 +73,32 @@ public:
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return (RAStackOffset > FPStackOffset) ?
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(RAStackOffset) : (FPStackOffset);
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}
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bool hasLoadArgs() const { return HasLoadArgs; }
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bool hasStoreVarArgs() const { return HasStoreVarArgs; }
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void recordLoadArgsFI(int FI, int SPOffset) {
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if (!HasLoadArgs) HasLoadArgs=true;
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FnLoadArgs.push_back(MipsFIHolder(FI, SPOffset));
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}
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void recordStoreVarArgsFI(int FI, int SPOffset) {
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if (!HasStoreVarArgs) HasStoreVarArgs=true;
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FnStoreVarArgs.push_back(MipsFIHolder(FI, SPOffset));
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}
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void adjustLoadArgsFI(MachineFrameInfo *MFI) const {
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if (!hasLoadArgs()) return;
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for (unsigned i = 0, e = FnLoadArgs.size(); i != e; ++i)
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MFI->setObjectOffset( FnLoadArgs[i].FI, FnLoadArgs[i].SPOffset );
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}
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void adjustStoreVarArgsFI(MachineFrameInfo *MFI) const {
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if (!hasStoreVarArgs()) return;
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for (unsigned i = 0, e = FnStoreVarArgs.size(); i != e; ++i)
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MFI->setObjectOffset( FnStoreVarArgs[i].FI, FnStoreVarArgs[i].SPOffset );
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}
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};
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} // end of namespace llvm
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#endif
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#endif // MIPS_MACHINE_FUNCTION_INFO_H
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