search for: x86_lowercccargu

Implementing tail call opt could look like the following: 0.)a fast calling convention (maybe use the current CallingConv::Fast, or create a CallingConv::TailCall) 1.) lowering of formal arguments like for example x86_LowerCCCArguments in stdcall mode we need to make sure that later mentioned CALL_CLOBBERED_REG is not used (remove it from available registers in callingconvention for argument passing?) 2.)lowering of the call: *if it can be shown that call really is tail call (next instruction is a return):...

Hello, Arnold. Only quick comments, I'll try to make a full review a little bit later. > 0.)a fast calling convention (maybe use the current > CallingConv::Fast, or create a CallingConv::TailCall) > 1.) lowering of formal arguments > like for example x86_LowerCCCArguments in stdcall mode > we need to make sure that later mentioned CALL_CLOBBERED_REG is > not used (remove it from availableregisters in callingconv > for argument passing?) This can be acceptable, only if function has internal linkage. Otherwise, we cannot change calling conve...