On Tue, May 10, 2016 at 4:13 PM, David Malcolm <dmalc...@redhat.com> wrote: > On Wed, 2016-05-04 at 16:49 -0400, David Malcolm wrote: > [...snip...] >> >> I wrote this by compiling a test.c with -fdump-rtl-all on >> x86_64-pc-linux-gnu, and then attempting to load the state at each >> pass, and then trying to run just one pass, and fixing bugs until the >> dump output from each pass was the same as when running the pass from >> cc1. I've only done this with a small subset of passes, and with a >> very >> simple test case, so I'm sure there are plenty of bugs and "x86_64 >> -isms" >> remaining. > > [...snip...] > > On the subject of "x86_64-isms", a couple of issues I ran into when > testing with --target=aarch64-linux-gnu: > > * roundtrip.exp fails due to different register names so e.g. this from > x86_64: > > (reg:SI 5 di [ i ])) > > becomes this after roundtripping on aarch64: > > (reg:SI 5 x5 [ i ])) > > (i.e. "di" vs "x5" for register 5). > > * unknown modes e.g. this from x86_64: > > (reg:CCGC 17 flags) > > fails on aarch64 due to the lack of a "CCGC" mode.
I expect most (if not all) RTL testcases will be target specific. Richard.
