Hi Claudiu,
On Mon, Dec 19, 2016 at 12:28:54PM +0000, Claudiu Zissulescu wrote:
> I have the following rtl before asmcons pass:
>
> (insn 8 13 9 2 (set (reg:SI 157 [ list ])
> (asm_operands:SI ("") ("=g") 0 [
> (const:SI (unspec:SI [
> (symbol_ref:SI ("c_const") [flags 0x2] <var_decl
> 0x7f6735ad25a0 c_const>)
> ] ARC_UNSPEC_GOTOFFPC))
> ]
> [
> (asm_input:SI ("0") ../t02.c:9)
> ]
> [] ../t02.c:9)) ../t02.c:9 -1
> (nil))
[ snip ]
asmcons eventual does reg_overlap_mentioned_p on the input of the move
it created with an input of the asm. The very first thing
reg_overlap_mentioned_p tests for is if the thing is constant. And it
is here, and that makes no sense at all (since it is an output, too!)
So how did that happen?
Segher
