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https://github.com/c64scene-ar/llvm-6502.git
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c60e76d139
.set PCRELV0, (LJTI1_0_0-(LPCRELL0+4))
LPCRELL0:
add r1, pc, #PCRELV0
This is not legal since add r1, pc, #c requires the constant be a multiple of 4.
Do the following instead:
.set PCRELV0, (LJTI1_0_0-(LPCRELL0+4))
LPCRELL0:
mov r1, #PCRELV0
add r1, pc
- In thumb mode, it's not possible to use .set generate a pc relative stub
address. The stub is ARM code which is in a different section from the thumb
code. Load the value from a constpool instead.
- Some asm printing clean up.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33664 91177308-0d34-0410-b5e6-96231b3b80d8
72 lines
2.5 KiB
C++
72 lines
2.5 KiB
C++
//===- ARMConstantPoolValue.cpp - ARM constantpool value --------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file was developed by Evan Cheng and is distributed under the
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// University of Illinois Open Source License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements the ARM specific constantpool value class.
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//
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//===----------------------------------------------------------------------===//
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#include "ARMConstantPoolValue.h"
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#include "llvm/ADT/FoldingSet.h"
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#include "llvm/GlobalValue.h"
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#include "llvm/Type.h"
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using namespace llvm;
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ARMConstantPoolValue::ARMConstantPoolValue(GlobalValue *gv, unsigned id,
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ARMCP::ARMCPKind k,
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unsigned char PCAdj)
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: MachineConstantPoolValue((const Type*)gv->getType()),
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GV(gv), S(NULL), LabelId(id), Kind(k), PCAdjust(PCAdj) {}
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ARMConstantPoolValue::ARMConstantPoolValue(const char *s, unsigned id,
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ARMCP::ARMCPKind k,
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unsigned char PCAdj)
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: MachineConstantPoolValue((const Type*)Type::Int32Ty),
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GV(NULL), S(s), LabelId(id), Kind(k), PCAdjust(PCAdj) {}
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int ARMConstantPoolValue::getExistingMachineCPValue(MachineConstantPool *CP,
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unsigned Alignment) {
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unsigned AlignMask = (1 << Alignment)-1;
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const std::vector<MachineConstantPoolEntry> Constants = CP->getConstants();
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for (unsigned i = 0, e = Constants.size(); i != e; ++i) {
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if (Constants[i].isMachineConstantPoolEntry() &&
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(Constants[i].Offset & AlignMask) == 0) {
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ARMConstantPoolValue *CPV =
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(ARMConstantPoolValue *)Constants[i].Val.MachineCPVal;
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if (CPV->GV == GV &&
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CPV->S == S &&
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CPV->LabelId == LabelId &&
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CPV->Kind == Kind &&
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CPV->PCAdjust == PCAdjust)
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return i;
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}
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}
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return -1;
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}
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void
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ARMConstantPoolValue::AddSelectionDAGCSEId(FoldingSetNodeID &ID) {
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ID.AddPointer(GV);
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ID.AddPointer(S);
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ID.AddInteger(LabelId);
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ID.AddInteger((unsigned)Kind);
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ID.AddInteger(PCAdjust);
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}
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void ARMConstantPoolValue::print(std::ostream &O) const {
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if (GV)
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O << GV->getName();
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else
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O << S;
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if (isNonLazyPointer()) O << "$non_lazy_ptr";
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else if (isStub()) O << "$stub";
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if (PCAdjust != 0) O << "-(LPIC" << LabelId << "+"
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<< (unsigned)PCAdjust << ")";
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}
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