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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
66 lines
2.3 KiB
C++
66 lines
2.3 KiB
C++
//===- ARMConstantPoolValue.h - 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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#ifndef LLVM_TARGET_ARM_CONSTANTPOOLVALUE_H
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#define LLVM_TARGET_ARM_CONSTANTPOOLVALUE_H
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#include "llvm/CodeGen/MachineConstantPool.h"
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namespace llvm {
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namespace ARMCP {
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enum ARMCPKind {
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CPValue,
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CPNonLazyPtr,
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CPStub
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};
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}
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/// ARMConstantPoolValue - ARM specific constantpool value. This is used to
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/// represent PC relative displacement between the address of the load
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/// instruction and the global value being loaded, i.e. (&GV-(LPIC+8)).
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class ARMConstantPoolValue : public MachineConstantPoolValue {
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GlobalValue *GV; // GlobalValue being loaded.
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const char *S; // ExtSymbol being loaded.
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unsigned LabelId; // Label id of the load.
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ARMCP::ARMCPKind Kind; // non_lazy_ptr or stub?
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unsigned char PCAdjust; // Extra adjustment if constantpool is pc relative.
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// 8 for ARM, 4 for Thumb.
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public:
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ARMConstantPoolValue(GlobalValue *gv, unsigned id,
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ARMCP::ARMCPKind Kind = ARMCP::CPValue,
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unsigned char PCAdj = 0);
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ARMConstantPoolValue(const char *s, unsigned id,
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ARMCP::ARMCPKind Kind = ARMCP::CPValue,
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unsigned char PCAdj = 0);
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GlobalValue *getGV() const { return GV; }
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const char *getSymbol() const { return S; }
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unsigned getLabelId() const { return LabelId; }
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bool isNonLazyPointer() const { return Kind == ARMCP::CPNonLazyPtr; }
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bool isStub() const { return Kind == ARMCP::CPStub; }
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unsigned char getPCAdjustment() const { return PCAdjust; }
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virtual int getExistingMachineCPValue(MachineConstantPool *CP,
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unsigned Alignment);
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virtual void AddSelectionDAGCSEId(FoldingSetNodeID &ID);
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virtual void print(std::ostream &O) const;
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};
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}
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#endif
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