[Bug target/79909] ICE error: invalid rtl sharing found in the insn on ppc64le

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79909

--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Very similar test-case:

$ cat ppc-ice.c
a (_Decimal128, _Decimal128, _Decimal128, _Decimal128, _Decimal128,
_Decimal128,
   _Decimal128, _Decimal128, _Decimal128);
b () { a (0, 0, 0, 0, 0, 0, 0, 0, 0); }

$ ppc64le-linux-gnu-gcc -mxl-compat -O2 ppc-ice.c
ppc-ice.c:1:1: warning: data definition has no type or storage class
 a (_Decimal128, _Decimal128, _Decimal128, _Decimal128, _Decimal128,
_Decimal128,
 ^
ppc-ice.c:1:1: warning: type defaults to ‘int’ in declaration of ‘a’
[-Wimplicit-int]
ppc-ice.c:3:1: warning: return type defaults to ‘int’ [-Wimplicit-int]
 b () { a (0, 0, 0, 0, 0, 0, 0, 0, 0); }
 ^
ppc-ice.c: In function ‘b’:
ppc-ice.c:3:1: error: invalid rtl sharing found in the insn
(call_insn 44 43 47 2 (parallel [
            (set (reg:DI 3 3)
                (call (mem:SI (symbol_ref:DI ("a") [flags 0x41] <function_decl
0x7fe9e9a7b300 a>) [0 a S4 A8])
                    (const_int 144 [0x90])))
            (clobber (reg:DI 65 lr))
        ]) "ppc-ice.c":3 668 {*call_value_nonlocal_aixdi}
     (expr_list:REG_CALL_DECL (symbol_ref:DI ("a") [flags 0x41] <function_decl
0x7fe9e9a7b300 a>)
        (expr_list:REG_UNUSED (reg:DI 3 3)
            (expr_list:REG_DEAD (reg:TD 34 2)
                (expr_list:REG_DEAD (reg:TD 36 4)
                    (expr_list:REG_DEAD (reg:TD 38 6)
                        (expr_list:REG_DEAD (reg:TD 40 8)
                            (expr_list:REG_DEAD (reg:TD 42 10)
                                (expr_list:REG_DEAD (reg:TD 44 12)
                                    (nil)))))))))
    (expr_list (use (reg:DI 2 2))
        (expr_list:TD (use (reg:TD 34 2))
            (expr_list:TD (use (reg:TD 36 4))
                (expr_list:TD (use (reg:TD 38 6))
                    (expr_list:TD (use (reg:TD 40 8))
                        (expr_list (use (reg:TD 42 10))
                            (expr_list (use (reg:TD 44 12))
                                (expr_list:TD (use (mem:TD (plus:DI (plus:DI
(reg/f:DI 1 1)
                                                    (const_int 32 [0x20]))
                                                (const_int 64 [0x40])) [0  S16
A64]))
                                    (expr_list:TD (use (mem:TD (plus:DI
(plus:DI (reg/f:DI 1 1)
                                                        (const_int 32 [0x20]))
                                                    (const_int 80 [0x50])) [0 
S16 A64]))
                                        (expr_list:TD (use (mem:TD (plus:DI
(plus:DI (reg/f:DI 1 1)
                                                            (const_int 32
[0x20]))
                                                        (const_int 96 [0x60]))
[0  S16 A64]))
                                            (expr_list:TD (use (mem:TD (plus:DI
(plus:DI (reg/f:DI 1 1)
                                                                (const_int 32
[0x20]))
                                                            (const_int 112
[0x70])) [0  S16 A64]))
                                                (expr_list:TD (use (mem:TD
(plus:DI (plus:DI (reg/f:DI 1 1)
                                                                    (const_int
32 [0x20]))
                                                                (const_int 128
[0x80])) [0  S16 A64]))
                                                    (nil))))))))))))))
ppc-ice.c:3:1: error: shared rtx
(plus:DI (reg/f:DI 1 1)
    (const_int 32 [0x20]))
ppc-ice.c:3:1: internal compiler error: internal consistency failure
0x80bc2b verify_rtx_sharing
        .././../gcc/emit-rtl.c:2774
0x80bb41 verify_rtx_sharing
        .././../gcc/emit-rtl.c:2789
0x80bb41 verify_rtx_sharing
        .././../gcc/emit-rtl.c:2789
0x80bb41 verify_rtx_sharing
        .././../gcc/emit-rtl.c:2789
0x80bb41 verify_rtx_sharing
        .././../gcc/emit-rtl.c:2789
0x80bb41 verify_rtx_sharing
        .././../gcc/emit-rtl.c:2789
0x80bb41 verify_rtx_sharing
        .././../gcc/emit-rtl.c:2789
0x80bb41 verify_rtx_sharing
        .././../gcc/emit-rtl.c:2789
0x80bb41 verify_rtx_sharing
        .././../gcc/emit-rtl.c:2789
0x80bb41 verify_rtx_sharing
        .././../gcc/emit-rtl.c:2789
0x80bb41 verify_rtx_sharing
        .././../gcc/emit-rtl.c:2789
0x80bb41 verify_rtx_sharing
        .././../gcc/emit-rtl.c:2789
0x80bb41 verify_rtx_sharing
        .././../gcc/emit-rtl.c:2789
0x810697 verify_rtl_sharing()
        .././../gcc/emit-rtl.c:2883
0xa9a612 execute_function_todo
        .././../gcc/passes.c:1983
0xa9aff5 execute_todo
        .././../gcc/passes.c:2016