search for: tapdanc

...sic block of all functions? I've seen "Live ins: D0" appear for an int (int)-type signature, so that seems right. I'd like to arrange for e.g. a void foo(char*p) signature so see a "live in A0", but can I custom lower to that immediately given that I'm going to do a tapdance with the instruction selections later on? If not, how do I distinguish these arguments from the data argument later on? Thanks, Andreas

...I've seen "Live ins: D0" appear for an > int (int)-type signature, so that seems right. Right. > I'd like to arrange for e.g. a void foo(char*p) signature so see a > "live in A0", but can I custom lower to that immediately given that > I'm going to do a tapdance with the instruction selections later on? > If not, how do I distinguish these arguments from the data argument > later on? Hrm. I suspect you'll have to add parameter attribute (see ParameterAttributes.h) that indicates it's used as an address. In SelectionDAGIsel.cpp:TargetLow...

On Sep 29, 2007, at 2:57 PM, Andreas Fredriksson <deplinenoise at gmail.com> wrote: > On 9/25/07, Evan Cheng <evan.cheng at apple.com> wrote: >>> Hi Evan, >>> wouldn't this generate fairly terrible code if each address register >>> use has to be preceded by instructions to make an address register >>> hold the right value? >> >>