On 11/25/2012 07:26 AM, Kai Tietz wrote:
> - if ((ccvt & (IX86_CALLCVT_FASTCALL | IX86_CALLCVT_THISCALL)) != 0)
> + if ((ccvt & IX86_CALLCVT_FASTCALL) != 0)
> {
> /* Fastcall functions use ecx/edx for arguments, which leaves
> us with EAX for the static chain.
> @@ -25142,6 +25160,12 @@ ix86_static_chain (const_tree fndecl, bo
> leaves us with EAX for the static chain. */
> regno = AX_REG;
> }
> + else if ((ccvt & IX86_CALLCVT_THISCALL) != 0)
> + {
> + /* Thiscall functions use ecx for arguments, which leaves
> + us with EDX for the static chain. */
> + regno = DX_REG;
> + }
How is this not abi breakage? Why not leave eax as the static chain?
r~
