Compiler warnings in the next branch

[trufae]

Using gcc11.4 on linux-ppc

$ make -j3
  CC      cs.o
  CC      SStream.o
  CC      utils.o
  CC      MCInstrDesc.o
  CC      MCRegisterInfo.o
  CC      MCInst.o
  CC      MCInstPrinter.o
  CC      Mapping.o
  CC      arch/ARM/ARMBaseInfo.o
  CC      arch/ARM/ARMDisassembler.o
  CC      arch/ARM/ARMDisassemblerExtension.o
  CC      arch/ARM/ARMInstPrinter.o
In file included from arch/ARM/ARMInstPrinter.c:66:
arch/ARM/ARMGenAsmWriter.inc:9626:6: warning: no previous prototype for ‘printInstruction’ [-Wmissing-prototypes]
 9626 | void printInstruction(MCInst *MI, uint64_t Address, SStream *O)
      |      ^~~~~~~~~~~~~~~~
arch/ARM/ARMGenAsmWriter.inc:12436:13: warning: no previous prototype for ‘getRegisterName’ [-Wmissing-prototypes]
12436 | const char *getRegisterName(unsigned RegNo, unsigned AltIdx)
      |             ^~~~~~~~~~~~~~~
  CC      arch/ARM/ARMMapping.o
  CC      arch/ARM/ARMModule.o
  CC      arch/AArch64/AArch64BaseInfo.o
  CC      arch/AArch64/AArch64Disassembler.o
  CC      arch/AArch64/AArch64DisassemblerExtension.o
arch/AArch64/AArch64Disassembler.c:411:10: warning: no previous prototype for ‘suggestBytesToSkip’ [-Wmissing-prototypes]
  411 | uint64_t suggestBytesToSkip(const uint8_t *Bytes, uint64_t Address)
      |          ^~~~~~~~~~~~~~~~~~
  CC      arch/AArch64/AArch64InstPrinter.o
arch/AArch64/AArch64InstPrinter.c:911:6: warning: no previous prototype for ‘AArch64AppleInstPrinter_printInst’ [-Wmissing-prototypes]
  911 | void AArch64AppleInstPrinter_printInst(MCInst *MI, uint64_t Address, const char *Annot, SStream *O)
      |      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  CC      arch/AArch64/AArch64Mapping.o
arch/AArch64/AArch64Mapping.c:226:6: warning: no previous prototype for ‘AArch64_setup_op’ [-Wmissing-prototypes]
  226 | void AArch64_setup_op(cs_aarch64_op *op)
      |      ^~~~~~~~~~~~~~~~
arch/AArch64/AArch64Mapping.c:615:14: warning: no previous prototype for ‘AArch64_map_insn’ [-Wmissing-prototypes]
  615 | aarch64_insn AArch64_map_insn(const char *name)
      |              ^~~~~~~~~~~~~~~~
arch/AArch64/AArch64Mapping.c:869:6: warning: no previous prototype for ‘AArch64_set_mem_access’ [-Wmissing-prototypes]
  869 | void AArch64_set_mem_access(MCInst *MI, bool status)
      |      ^~~~~~~~~~~~~~~~~~~~~~
  CC      arch/AArch64/AArch64Module.o
  CC      arch/M68K/M68KDisassembler.o
  CC      arch/M68K/M68KInstPrinter.o
  CC      arch/M68K/M68KModule.o
  CC      arch/Mips/MipsDisassembler.o
  CC      arch/Mips/MipsInstPrinter.o
  CC      arch/Mips/MipsMapping.o
  CC      arch/Mips/MipsModule.o
  CC      arch/PowerPC/PPCDisassembler.o
arch/PowerPC/PPCDisassembler.c:210:14: warning: no previous prototype for ‘DecodeDMRROWRCRegisterClass’ [-Wmissing-prototypes]
  210 | DecodeStatus DecodeDMRROWRCRegisterClass(MCInst *Inst, uint64_t RegNo,
      |              ^~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/PowerPC/PPCDisassembler.c:232:14: warning: no previous prototype for ‘DecodeDMRpRCRegisterClass’ [-Wmissing-prototypes]
  232 | DecodeStatus DecodeDMRpRCRegisterClass(MCInst *Inst, uint64_t RegNo,
      |              ^~~~~~~~~~~~~~~~~~~~~~~~~
  CC      arch/PowerPC/PPCInstPrinter.o
arch/PowerPC/PPCInstPrinter.c:686:13: warning: no previous prototype for ‘getVerboseConditionRegName’ [-Wmissing-prototypes]
  686 | const char *getVerboseConditionRegName(const MCInst *MI, unsigned RegNum,
      |             ^~~~~~~~~~~~~~~~~~~~~~~~~~
  CC      arch/PowerPC/PPCMapping.o
  CC      arch/PowerPC/PPCModule.o
  CC      arch/RISCV/RISCVDisassembler.o
  CC      arch/RISCV/RISCVInstPrinter.o
  CC      arch/RISCV/RISCVMapping.o
  CC      arch/RISCV/RISCVModule.o
  CC      arch/Sparc/SparcDisassembler.o
  CC      arch/Sparc/SparcInstPrinter.o
  CC      arch/Sparc/SparcMapping.o
  CC      arch/Sparc/SparcModule.o
  CC      arch/SystemZ/SystemZDisassembler.o
  CC      arch/SystemZ/SystemZInstPrinter.o
  CC      arch/SystemZ/SystemZMCTargetDesc.o
  CC      arch/SystemZ/SystemZMapping.o
  CC      arch/SystemZ/SystemZModule.o
  CC      arch/SH/SHDisassembler.o
  CC      arch/SH/SHInstPrinter.o
  CC      arch/SH/SHModule.o
  CC      arch/X86/X86DisassemblerDecoder.o
  CC      arch/X86/X86Disassembler.o
  CC      arch/X86/X86InstPrinterCommon.o
  CC      arch/X86/X86IntelInstPrinter.o
  CC      arch/X86/X86ATTInstPrinter.o
  CC      arch/X86/X86Mapping.o
  CC      arch/X86/X86Module.o
  CC      arch/XCore/XCoreDisassembler.o
  CC      arch/XCore/XCoreInstPrinter.o
  CC      arch/XCore/XCoreMapping.o
  CC      arch/XCore/XCoreModule.o
  CC      arch/TMS320C64x/TMS320C64xDisassembler.o
  CC      arch/TMS320C64x/TMS320C64xInstPrinter.o
  CC      arch/TMS320C64x/TMS320C64xMapping.o
  CC      arch/TMS320C64x/TMS320C64xModule.o
  CC      arch/M680X/M680XDisassembler.o
  CC      arch/M680X/M680XInstPrinter.o
  CC      arch/M680X/M680XModule.o
  CC      arch/EVM/EVMDisassembler.o
  CC      arch/EVM/EVMInstPrinter.o
  CC      arch/EVM/EVMMapping.o
  CC      arch/EVM/EVMModule.o
  CC      arch/MOS65XX/MOS65XXDisassembler.o
  CC      arch/MOS65XX/MOS65XXModule.o
  CC      arch/WASM/WASMDisassembler.o
  CC      arch/WASM/WASMInstPrinter.o
  CC      arch/WASM/WASMMapping.o
  CC      arch/WASM/WASMModule.o
  CC      arch/BPF/BPFDisassembler.o
  CC      arch/BPF/BPFInstPrinter.o
  CC      arch/BPF/BPFMapping.o
  CC      arch/BPF/BPFModule.o
  CC      arch/TriCore/TriCoreDisassembler.o
  CC      arch/TriCore/TriCoreInstPrinter.o
  CC      arch/TriCore/TriCoreMapping.o
  CC      arch/TriCore/TriCoreModule.o
  CC      arch/Alpha/AlphaDisassembler.o
In file included from arch/Alpha/AlphaDisassembler.c:30:
arch/Alpha/AlphaDisassembler.c: In function ‘Alpha_LLVM_getInstruction’:
arch/Alpha/AlphaGenDisassemblerTables.inc:1026:10: warning: ‘DecodeComplete’ may be used uninitialized [-Wmaybe-uninitialized]
 1026 |       if (DecodeComplete) { \
      |          ^
arch/Alpha/AlphaGenDisassemblerTables.inc:1024:12: note: ‘DecodeComplete’ was declared here
 1024 |       bool DecodeComplete; \
      |            ^~~~~~~~~~~~~~
arch/Alpha/AlphaGenDisassemblerTables.inc:1060:1: note: in expansion of macro ‘DecodeInstruction’
 1060 | DecodeInstruction(decodeInstruction_4, fieldFromInstruction_4, decodeToMCInst_4, uint32_t)
      | ^~~~~~~~~~~~~~~~~
  CC      arch/Alpha/AlphaInstPrinter.o
  CC      arch/Alpha/AlphaMapping.o
  CC      arch/Alpha/AlphaModule.o
  CC      arch/HPPA/HPPADisassembler.o
  CC      arch/HPPA/HPPAInstPrinter.o
arch/HPPA/HPPADisassembler.c:3815:6: warning: no previous prototype for ‘init_details’ [-Wmissing-prototypes]
 3815 | void init_details(MCInst *MI)
      |      ^~~~~~~~~~~~
  CC      arch/HPPA/HPPAMapping.o

[trufae]

gcc13 reports this message ad infinitum (as well as many other warnings)

In function 'get_op_access',
    inlined from 'printOperand' at arch/X86/X86ATTInstPrinter.c:575:5:
arch/X86/X86ATTInstPrinter.c:307:35: warning: writing 16 bytes into a region of size 0 [-Wstringop-overflow=]
  307 |                         access[i] = arr[count - i];
      |                         ~~~~~~~~~~^~~~~~~~~~~~~~~~
arch/X86/X86ATTInstPrinter.c: In function 'printOperand':
arch/X86/X86ATTInstPrinter.c:569:41: note: at offset 128 into destination object 'access' of size 6
  569 |                                 uint8_t access[CS_X86_MAXIMUM_OPERAND_SIZE];
      |                                         ^~~~~~
In function 'get_op_access',
    inlined from 'printOperand' at arch/X86/X86ATTInstPrinter.c:575:5:
arch/X86/X86ATTInstPrinter.c:307:35: warning: writing 16 bytes into a region of size 0 [-Wstringop-overflow=]
  307 |                         access[i] = arr[count - i];
      |                         ~~~~~~~~~~^~~~~~~~~~~~~~~~

[Rot127]

The -Wmaybe-uninitialized is giving us false positive on some LLVM code. This is why we have disabled it.
The others are of course valid. Will add the over the next weeks.

[Rot127]

Moved this to the v6 - Beta milestone. The important ones are fixed in #2469. The rest should be only the missing-prototype.

With the v6 Beta the PPC and ARM update to LLVM-18 will come. And the Auto-Sync process will be more streamlined and be reproducible. Then we can fix those.