compilation with -O1: fixed or forbidden register 8 (a0) was spilled for class ADDR_REGS

[jens-maus]

When compiling our MUI sources with -O1 we are receiving compiler error like:

Area.c:2747: fixed or forbidden register 8 (a0) was spilled for class ADDR_REGS.
Area.c:2747: This may be due to a compiler bug or to impossible asm
Area.c:2747: statements or clauses.
Area.c:2747: This is the instruction:
(insn/i 1548 1547 1549 (set (reg/v:SI 12 a4)
        (mem/s:SI (plus:SI (reg/v:SI 5 d5)
                (const_int 16 [0x10])) 0)) 42 {movsi+1} (nil)
    (nil))

[cahirwpz]

Can you compile MUI with -O1 with your old handcrafted toolchain ?

[jens-maus]

Yes, of course.