unexpected RTL

Florent DEFAY <spira.inhabitant@xxxxxxxxx> · Thu, 26 Mar 2009 11:00:05 +0100

Hi,

I am working on a new port for a 16bits target, 8 registers.

When compiling libgcc2.c I get this error:

../../../gcc-4.3.3/libgcc/../gcc/libgcc2.c: In function ‘__mulsi3’:
../../../gcc-4.3.3/libgcc/../gcc/libgcc2.c:566: error: insn does not
satisfy its constraints:
(insn 122 171 102 ../../../gcc-4.3.3/libgcc/../gcc/libgcc2.c:565 (set
(mem/c/i:HI (plus:HI (mem/f/c/i:HI (plus:HI (reg/f:HI 5 r5)
                        (const_int 2 [0x2])) [0 D.2445+0 S2 A16])
                (const_int 2 [0x2])) [0 <result>+2 S2 A16])
        (reg:HI 0 r0)) 5 {movhi} (nil))
../../../gcc-4.3.3/libgcc/../gcc/libgcc2.c:566: internal compiler
error: in final_scan_insn, at final.c:2548

According to my GO_IF_LEGITIMATE_ADDRESS, this RTL should not exist.
Is it possible that there are not enough registers in the machine ?

What could explain such a behavior? Can the register configuration be the cause?

Thank you.

Regards.

Florent