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[named address] rejects-valid: error: initializer element is not computable at load time


For the following 1-liner I get an error with current trunk r177267:

const __pgm char * pallo = "pallo";

__pgm as a named address space qualifier.


>$TV/xgcc -B$TV pgm.c -c -save-temps -dp -mmcu=atmega8
 <addr_space_convert_expr 0xb74cdfc0
    type <pointer_type 0xb74c7f60
        type <integer_type 0xb74c7f00 char readonly address-space-1 string-flag QI
            size <integer_cst 0xb745b1a4 constant 8>
            unit size <integer_cst 0xb745b1b8 constant 1>
            align 8 symtab 0 alias set -1 canonical type 0xb74c7f00 precision 8 min <integer_cst
0xb745b17c -128> max <integer_cst 0xb745b208 127>
            pointer_to_this <pointer_type 0xb74c7f60>>
        unsigned PHI
        size <integer_cst 0xb745b064 constant 16>
        unit size <integer_cst 0xb745b078 constant 2>
        align 8 symtab 0 alias set -1 canonical type 0xb74c7f60>
    readonly constant
    arg 0 <nop_expr 0xb74cdfa8
        type <pointer_type 0xb7473f00 type <integer_type 0xb746a240 char>
            unsigned HI size <integer_cst 0xb745b064 16> unit size <integer_cst 0xb745b078 2>
            align 8 symtab 0 alias set -1 canonical type 0xb7473f00>
        readonly constant
        arg 0 <addr_expr 0xb74cdf90 type <pointer_type 0xb74db120>
            readonly constant
            arg 0 <string_cst 0xb74cdf78 type <array_type 0xb74db0c0>
                readonly constant static "pallo\000">
            pgm.c:1:28>
        pgm.c:1:28>
    pgm.c:1:28>
pgm.c:1:1: error: initializer element is not computable at load time

Is that a flaw in c-typeck.c?

I know the line worked some time ago; from time to time I merge trunk into
the named address space support for AVR which is not in SVN.

If you need the patch to reproduce the bug I will upload the patch, of course.

No BE hook is called for the tree.

Moreover, if a user writes a line like
   const __pgm char * pallo = "pallo";
he wants the string literal to be placed in the non-default address
space.  There is no other way to express that except something like
   const __pgm char * pallo = (const __pgm char*) "pallo";
which doesn't work either and triggers

pgm.c:1:1: error: initializer element is not constant

with a tree dump similar to above.


Johann


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