[llvm-commits] [llvm] r135634 - in /llvm/trunk: include/llvm/Target/TargetFrameLowering.h lib/Target/X86/X86FrameLowering.cpp lib/Target/X86/X86FrameLowering.h
Bill Wendling
isanbard at gmail.com
Wed Jul 20 16:04:10 PDT 2011
Author: void
Date: Wed Jul 20 18:04:09 2011
New Revision: 135634
URL: http://llvm.org/viewvc/llvm-project?rev=135634&view=rev
Log:
Remove the now defunct getCompactUnwindEncoding method from the frame lowering code.
Modified:
llvm/trunk/include/llvm/Target/TargetFrameLowering.h
llvm/trunk/lib/Target/X86/X86FrameLowering.cpp
llvm/trunk/lib/Target/X86/X86FrameLowering.h
Modified: llvm/trunk/include/llvm/Target/TargetFrameLowering.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/Target/TargetFrameLowering.h?rev=135634&r1=135633&r2=135634&view=diff
==============================================================================
--- llvm/trunk/include/llvm/Target/TargetFrameLowering.h (original)
+++ llvm/trunk/include/llvm/Target/TargetFrameLowering.h Wed Jul 20 18:04:09 2011
@@ -186,14 +186,6 @@
///
virtual void processFunctionBeforeFrameFinalized(MachineFunction &MF) const {
}
-
- /// getCompactUnwindEncoding - Get the compact unwind encoding for the
- /// function. Return 0 if the compact unwind isn't available.
- virtual uint32_t getCompactUnwindEncoding(ArrayRef<MCCFIInstruction> Instrs,
- int DataAlignmentFactor,
- bool IsEH) const {
- return 0;
- }
};
} // End llvm namespace
Modified: llvm/trunk/lib/Target/X86/X86FrameLowering.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/X86/X86FrameLowering.cpp?rev=135634&r1=135633&r2=135634&view=diff
==============================================================================
--- llvm/trunk/lib/Target/X86/X86FrameLowering.cpp (original)
+++ llvm/trunk/lib/Target/X86/X86FrameLowering.cpp Wed Jul 20 18:04:09 2011
@@ -1076,118 +1076,3 @@
return permutationEncoding;
}
-
-uint32_t X86FrameLowering::
-getCompactUnwindEncoding(ArrayRef<MCCFIInstruction> Instrs,
- int DataAlignmentFactor, bool IsEH) const {
- uint32_t Encoding = 0;
- int CFAOffset = 0;
- const TargetRegisterInfo *TRI = TM.getRegisterInfo();
- unsigned SavedRegs[6] = { 0, 0, 0, 0, 0, 0 };
- unsigned SavedRegIdx = 0;
- int FramePointerReg = -1;
-
- for (ArrayRef<MCCFIInstruction>::const_iterator
- I = Instrs.begin(), E = Instrs.end(); I != E; ++I) {
- const MCCFIInstruction &Inst = *I;
- MCSymbol *Label = Inst.getLabel();
-
- // Ignore invalid labels.
- if (Label && !Label->isDefined()) continue;
-
- unsigned Operation = Inst.getOperation();
- if (Operation != MCCFIInstruction::Move &&
- Operation != MCCFIInstruction::RelMove)
- // FIXME: We can't handle this frame just yet.
- return 0;
-
- const MachineLocation &Dst = Inst.getDestination();
- const MachineLocation &Src = Inst.getSource();
- const bool IsRelative = (Operation == MCCFIInstruction::RelMove);
-
- if (Dst.isReg() && Dst.getReg() == MachineLocation::VirtualFP) {
- if (Src.getReg() != MachineLocation::VirtualFP) {
- // DW_CFA_def_cfa
- assert(FramePointerReg == -1 &&"Defining more than one frame pointer?");
- if (TRI->getLLVMRegNum(Src.getReg(), IsEH) != X86::EBP &&
- TRI->getLLVMRegNum(Src.getReg(), IsEH) != X86::RBP)
- // The frame pointer isn't EBP/RBP. Cannot make unwind information
- // compact.
- return 0;
- FramePointerReg = TRI->getCompactUnwindRegNum(Src.getReg(), IsEH);
- } // else DW_CFA_def_cfa_offset
-
- if (IsRelative)
- CFAOffset += Src.getOffset();
- else
- CFAOffset -= Src.getOffset();
-
- continue;
- }
-
- if (Src.isReg() && Src.getReg() == MachineLocation::VirtualFP) {
- // DW_CFA_def_cfa_register
- assert(FramePointerReg == -1 && "Defining more than one frame pointer?");
-
- if (TRI->getLLVMRegNum(Dst.getReg(), IsEH) != X86::EBP &&
- TRI->getLLVMRegNum(Dst.getReg(), IsEH) != X86::RBP)
- // The frame pointer isn't EBP/RBP. Cannot make unwind information
- // compact.
- return 0;
-
- FramePointerReg = TRI->getCompactUnwindRegNum(Dst.getReg(), IsEH);
- if (SavedRegIdx != 1 || SavedRegs[0] != unsigned(FramePointerReg))
- return 0;
-
- SavedRegs[0] = 0;
- SavedRegIdx = 0;
- continue;
- }
-
- unsigned Reg = Src.getReg();
- int Offset = Dst.getOffset();
- if (IsRelative)
- Offset -= CFAOffset;
- Offset /= DataAlignmentFactor;
-
- if (Offset < 0) {
- // FIXME: Handle?
- // DW_CFA_offset_extended_sf
- return 0;
- } else if (Reg < 64) {
- // DW_CFA_offset + Reg
- if (SavedRegIdx >= 6) return 0;
- int CURegNum = TRI->getCompactUnwindRegNum(Reg, IsEH);
- if (CURegNum == -1) return 0;
- SavedRegs[SavedRegIdx++] = CURegNum;
- } else {
- // FIXME: Handle?
- // DW_CFA_offset_extended
- return 0;
- }
- }
-
- // Bail if there are too many registers to encode.
- if (SavedRegIdx > 6) return 0;
-
- // Check if the offset is too big.
- CFAOffset /= 4;
- if ((CFAOffset & 0xFF) != CFAOffset)
- return 0;
- Encoding |= (CFAOffset & 0xFF) << 16; // Size encoding.
-
- if (FramePointerReg != -1) {
- Encoding |= 0x01000000; // EBP/RBP Unwind Frame
- for (unsigned I = 0; I != SavedRegIdx; ++I) {
- unsigned Reg = SavedRegs[I];
- if (Reg == unsigned(FramePointerReg)) continue;
- Encoding |= (Reg & 0x7) << (I * 3); // Register encoding
- }
- } else {
- Encoding |= 0x02000000; // Frameless unwind with small stack
- Encoding |= (SavedRegIdx & 0x7) << 10;
- Encoding |= permuteEncode(SavedRegIdx, SavedRegs);
- }
-
- return Encoding;
-}
Modified: llvm/trunk/lib/Target/X86/X86FrameLowering.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/X86/X86FrameLowering.h?rev=135634&r1=135633&r2=135634&view=diff
==============================================================================
--- llvm/trunk/lib/Target/X86/X86FrameLowering.h (original)
+++ llvm/trunk/lib/Target/X86/X86FrameLowering.h Wed Jul 20 18:04:09 2011
@@ -58,9 +58,6 @@
bool hasReservedCallFrame(const MachineFunction &MF) const;
int getFrameIndexOffset(const MachineFunction &MF, int FI) const;
-
- uint32_t getCompactUnwindEncoding(ArrayRef<MCCFIInstruction> Instrs,
- int DataAlignmentFactor, bool IsEH) const;
};
} // End llvm namespace
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