Hi! >From some discussion today, I think we want to limit the scope of this patch to just the power8-fusion flag that's causing trouble for now, given stage 4. We've talked about making power8-fusion a do- nothing flag, since it doesn't add much benefit now and probably shouldn't be a separate flag anyway. Having it as a meaningless flag makes it more palatable to add an exception for it in the inlining path.
Others, feel free to weigh in. Thanks, Bill On 1/5/22 1:34 AM, Kewen.Lin wrote: > Hi, > > This patch is to fix the inconsistent behaviors for non-LTO mode > and LTO mode. As Martin pointed out, currently the function > rs6000_can_inline_p simply makes it inlinable if callee_tree is > NULL, but it's unexpected, we should use the command line options > from target_option_default_node as default. > > It replaces rs6000_isa_flags with target_option_default_node when > caller_tree is NULL since it's more straightforward and doesn't > suffer from some bug not to keep rs6000_isa_flags as default. > > It also extends the scope of the check for the case that callee > has explicit set options, inlining in test case pr102059-5.c can > happen unexpectedly before, it's fixed accordingly. > > As Richi/Mike pointed out, some tuning flags like MASK_P8_FUSION > can be neglected for always inlining, this patch also takes some > flags when the callee is attributed by always_inline. > > v1: https://gcc.gnu.org/pipermail/gcc-patches/2021-September/578552.html > v2: https://gcc.gnu.org/pipermail/gcc-patches/2021-December/586112.html > > This patch is one re-post of this updated version[1] and also > rebased and adjusted on top of the related commit r12-6219. > > Bootstrapped and regtested on powerpc64-linux-gnu P8 and > powerpc64le-linux-gnu P9 and P10. > > Is it ok for trunk? > > [1] https://gcc.gnu.org/pipermail/gcc-patches/2021-December/586296.html > > BR, > Kewen > ----- > gcc/ChangeLog: > > PR target/102059 > * config/rs6000/rs6000.c (rs6000_can_inline_p): Adjust with > target_option_default_node and consider always_inline_safe flags. > > gcc/testsuite/ChangeLog: > > PR target/102059 > * gcc.target/powerpc/pr102059-4.c: New test. > * gcc.target/powerpc/pr102059-5.c: New test. > * gcc.target/powerpc/pr102059-6.c: New test. > * gcc.target/powerpc/pr102059-7.c: New test. > * gcc.target/powerpc/pr102059-8.c: New test. > * gcc.dg/lto/pr102059-1_0.c: Remove unneeded option. > >
