linux-kernel - lib/lz4/lz4_decompress.c:487:1: internal compiler error: output

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Date:   Fri, 6 Oct 2017 00:10:34 +0800
From:   kbuild test robot <fengguang.wu@...el.com>
To:     Colin Ian King <colin.king@...onical.com>
Cc:     kbuild-all@...org, linux-kernel@...r.kernel.org,
        Andrew Morton <akpm@...ux-foundation.org>,
        Linux Memory Management List <linux-mm@...ck.org>
Subject: lib/lz4/lz4_decompress.c:487:1: internal compiler error:
 output_operand: unrecognized address

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   42b76d0e6b1fe0fcb90e0ff6b4d053d50597b031
commit: 8cb5d7482810b7eb1bb05bf4f71bc93ce35e5896 lib/lz4: make arrays static const, reduces object code size
date:   2 days ago
config: cris-dev88_defconfig (attached as .config)
compiler: cris-linux-gcc (GCC) 6.2.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout 8cb5d7482810b7eb1bb05bf4f71bc93ce35e5896
        # save the attached .config to linux build tree
        make.cross ARCH=cris 

All errors (new ones prefixed by >>):

   (post_inc:SI (reg:SI 15 acr))
   lib/lz4/lz4_decompress.c: In function 'LZ4_decompress_safe_usingDict':
>> lib/lz4/lz4_decompress.c:487:1: internal compiler error: output_operand: unrecognized address
    }
    ^
   0x6f7b1f output_operand_lossage(char const*, ...)
   	/c/gcc/gcc/final.c:3409
   0x6f7dc3 output_address(machine_mode, rtx_def*)
   	/c/gcc/gcc/final.c:3859
   0x6f7d1c output_operand(rtx_def*, int)
   	/c/gcc/gcc/final.c:3843
   0x6f81df output_asm_insn(char const*, rtx_def**)
   	/c/gcc/gcc/final.c:3759
   0x6f9c8c output_asm_insn(char const*, rtx_def**)
   	/c/gcc/gcc/final.c:3010
   0x6f9c8c final_scan_insn(rtx_insn*, _IO_FILE*, int, int, int*)
   	/c/gcc/gcc/final.c:3015
   0x6fa189 final(rtx_insn*, _IO_FILE*, int)
   	/c/gcc/gcc/final.c:2045
   0x6fa697 rest_of_handle_final
   	/c/gcc/gcc/final.c:4441
   0x6fa697 execute
   	/c/gcc/gcc/final.c:4516
   Please submit a full bug report,
   with preprocessed source if appropriate.
   Please include the complete backtrace with any bug report.
   See <http://gcc.gnu.org/bugs.html> for instructions.
   {standard input}: Assembler messages:
   {standard input}:4875: Warning: end of file not at end of a line; newline inserted
   {standard input}:4876: Error: Illegal operands

vim +487 lib/lz4/lz4_decompress.c

cffb78b0 Kyungsik Lee 2013-07-08  480  
4e1a33b1 Sven Schmidt 2017-02-24  481  int LZ4_decompress_safe_usingDict(const char *source, char *dest,
4e1a33b1 Sven Schmidt 2017-02-24  482  	int compressedSize, int maxOutputSize,
4e1a33b1 Sven Schmidt 2017-02-24  483  	const char *dictStart, int dictSize)
4e1a33b1 Sven Schmidt 2017-02-24  484  {
4e1a33b1 Sven Schmidt 2017-02-24  485  	return LZ4_decompress_usingDict_generic(source, dest,
4e1a33b1 Sven Schmidt 2017-02-24  486  		compressedSize, maxOutputSize, 1, dictStart, dictSize);
cffb78b0 Kyungsik Lee 2013-07-08 @487  }
cffb78b0 Kyungsik Lee 2013-07-08  488  

:::::: The code at line 487 was first introduced by commit
:::::: cffb78b0e0b3a30b059b27a1d97500cf6464efa9 decompressor: add LZ4 decompressor module

:::::: TO: Kyungsik Lee <kyungsik.lee@....com>
:::::: CC: Linus Torvalds <torvalds@...ux-foundation.org>

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