ICE for overlap of asm-register-declared variable and asm clobber list [H8/S target]

["Prafulla Thakare" <PrafullaT at KPITCummins dot com>]

Hi,

Following code gives ICE (Internal compilation Error). I am compiling it for H8/S target. 
void bug(char* dst) 
{
	register char* _dst __asm ("er6");
	__asm__ ("eepmov.b":"=g"(*_dst)::"r4","er5","er6");
}
command used is:
>h8300-elf-gcc.exe -S bug.c bug.c

What is expected from this code while compiling is "Simple error" saying "asm-specifier for variable 'dst' conflicts with asm clobber list". Instead, it is giving an "Internal Compiler Error". 

Please refer to earlier posting related to this at http://gcc.gnu.org/ml/gcc-patches/2002-09/msg01168.html.

As per this patch, this conflict is detected in function "expand_asm_operands()" (stmt.c) while doing "SANITY" check for overlap between clobbers and output operands. 
I have two queries regarding this;

1. As it is well know conflict and error, does it really necessary to give an "Internal Compiler Error"? Or simple conflict error will do? I understand that, the compiler is expected to catch this conflict much earlier and output the error.

2. Where the compiler should catch this error prior to above mention "SANITY" check? I guess it should be able to this in "decl_conflicts_with_clobbers_p()" function. I would like to fix the above problem i.e. Compiler should detect above as clobber conflict and display the error "asm-specifier for variable 'dst' conflicts with asm clobber list" and NOT the ICE.

Any help on this would be highly appreciated.

Regards,
Prafull