[Bug target/14678] New: m6811-elf-gcc ICE

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    gcc ICE if I do:
    ================
	$ m6811-elf-gcc -c -O3 -fomit-frame-pointer -m68hc12 -mshort a.cpp
	$ m6811-elf-gcc -c -O2 -fomit-frame-pointer -m68hc12 -mshort a.cpp

    Here is a ICE msg:
    ==================

	a.cpp: In function `int test(int, char**)':
	a.cpp:59: error: insn does not satisfy its constraints:
	(insn:HI 318 546 324 17 (set (mem/s:QI (symbol_ref:HI ("*_ZZ4testiPPcE5wrbuf") <var_decl 0x400bbbd0 wrbuf>) [0 wrbuf+0 S1 A8])
		(mem:QI (plus:HI (reg/f:HI 3 sp)
			(const_int 16 [0x10])) [21 S1 A8])) 30 {*movqi_68hc12} (insn_list 317 (nil))
	    (nil))
	a.cpp:59: internal compiler error: in reload_cse_simplify_operands, at postreload.c:378
	Please submit a full bug report,
	with preprocessed source if appropriate.
	See <URL:http://gcc.gnu.org/bugs.html> for instructions.


    Here is a 'a.cpp':
    ==================

	typedef unsigned int size_t;
	extern "C" void *memcpy(void *__dest, const void *__src, size_t __n);
	extern "C" int strcmp(const char *__s, const char *__t);
	extern "C" int printf(const char *__format, ...);

	extern void writebuf(const unsigned char *, unsigned short);
	volatile unsigned char busy;
	inline static unsigned char isBusy() { return busy; }

	int
	test(int argc, char *argv[])
	{
	    static unsigned char buf[8], wrbuf[3];
	    static unsigned short addr;

	    if (argc > 1 && !strcmp(argv[1], "wr"))
	    {
		addr = 0x0000;
		memcpy(buf, (unsigned char*)0x3000, sizeof(buf));
		for (unsigned char i = 0; i < sizeof(buf); ++i)
		{
		    wrbuf[0] = (unsigned char) (addr >> 8);
		    wrbuf[1] = (unsigned char) addr;
		    wrbuf[2] = buf[i];
		    while (isBusy());
		    writebuf(wrbuf, 3);
		    ++addr;
		}
	    }
	    else if (argc > 1 && !strcmp(argv[1], "wr1"))
	    {
		memcpy(buf, (unsigned char*)(0x3000 + sizeof(buf)), sizeof(buf));
		addr = 0x0008;
		for (unsigned char i = 0; i < sizeof(buf); ++i)
		{
		    wrbuf[0] = (unsigned char) (addr >> 8);
		    wrbuf[1] = (unsigned char) addr;
		    wrbuf[2] = buf[i];
		    while (isBusy());
		    writebuf(wrbuf, 3);
		    ++addr;
		}
	    }
	    else if (argc > 1 && !strcmp(argv[1], "wr2"))
	    {
		printf("wr: %x\n", *(unsigned short*)(&buf[0]));
		for (unsigned char i = 0; i < 2; ++i)
		{
		    wrbuf[0] = (unsigned char) (addr >> 8);
		    wrbuf[1] = (unsigned char) addr;
		    wrbuf[2] = buf[i];
		    while (isBusy());
		    writebuf(wrbuf, 3);
		    ++addr;
		}
	    }

	    return 0;
	}

Environment:
System: Linux namsh 2.6.5-rc2 #68 Mon Mar 22 10:33:09 KST 2004 i686 athlon i386 GNU/Linux
Architecture: i686

	
host: i686-pc-linux-gnu
build: i686-pc-linux-gnu
target: m6811-unknown-none
configured with: ../configure --disable-nls --target=m6811-elf --prefix=/usr/GNUHCS --program-prefix=m6811-elf- --with-gnu-ld --with-gnu-as --disable-shared --enable-languages=c,c++ --without-headers --with-newlib

How-To-Repeat:
	Compile the 'a.cpp' with a given compile option.
------- Additional Comments From namsh at kldp dot org  2004-03-22 08:41 -------
Fix:
	Change the compile option. For example:
	1.  Use '-O1' instead of '-O2' or '-O3'.
	2.  Do not use '-fomit-frame-pointer'.

-- 
           Summary: m6811-elf-gcc ICE
           Product: gcc
           Version: 3.4
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: namsh at kldp dot org
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: i686-pc-linux-gnu
  GCC host triplet: i686-pc-linux-gnu
GCC target triplet: m6811-unknown-none


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14678