ce96738dee
Currently, it prints the backward branch offset as unsigned value
like below:
7: 7d 34 0b 00 00 00 00 00 if r4 s>= r3 goto 11 <LBB0_3>
8: b7 00 00 00 00 00 00 00 r0 = 0
LBB0_2:
9: 07 00 00 00 01 00 00 00 r0 += 1
......
17: bf 31 00 00 00 00 00 00 r1 = r3
18: 6d 32 f6 ff 00 00 00 00 if r2 s> r3 goto 65526 <LBB0_3+0x7FFB0>
The correct print insn 18 should be:
18: 6d 32 f6 ff 00 00 00 00 if r2 s> r3 goto -10 <LBB0_2>
To provide better clarity and be consistent with kernel verifier output,
the insn 7 output is changed to the following with "+" added to
non-negative branch offset:
7: 7d 34 0b 00 00 00 00 00 if r4 s>= r3 goto +11 <LBB0_3>
Signed-off-by: Yonghong Song <yhs@fb.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
llvm-svn: 318442
42 lines
1.5 KiB
C++
42 lines
1.5 KiB
C++
//===-- BPFInstPrinter.h - Convert BPF MCInst to asm syntax -------*- C++ -*--//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This class prints a BPF MCInst to a .s file.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LIB_TARGET_BPF_INSTPRINTER_BPFINSTPRINTER_H
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#define LLVM_LIB_TARGET_BPF_INSTPRINTER_BPFINSTPRINTER_H
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#include "llvm/MC/MCInstPrinter.h"
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namespace llvm {
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class BPFInstPrinter : public MCInstPrinter {
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public:
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BPFInstPrinter(const MCAsmInfo &MAI, const MCInstrInfo &MII,
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const MCRegisterInfo &MRI)
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: MCInstPrinter(MAI, MII, MRI) {}
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void printInst(const MCInst *MI, raw_ostream &O, StringRef Annot,
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const MCSubtargetInfo &STI) override;
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void printOperand(const MCInst *MI, unsigned OpNo, raw_ostream &O,
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const char *Modifier = nullptr);
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void printMemOperand(const MCInst *MI, int OpNo, raw_ostream &O,
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const char *Modifier = nullptr);
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void printImm64Operand(const MCInst *MI, unsigned OpNo, raw_ostream &O);
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void printBrTargetOperand(const MCInst *MI, unsigned OpNo, raw_ostream &O);
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// Autogenerated by tblgen.
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void printInstruction(const MCInst *MI, raw_ostream &O);
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static const char *getRegisterName(unsigned RegNo);
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};
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}
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#endif
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