On Mon, 13 Mar 2017 10:50:28 PDT (-0700), l...@redhat.com wrote: > > RISCV targets were failing to build due to implicit-fallthru warnings. > > This changes comments which indicated expected fallthru to use the > attribute and the port builds again. I assume something about the use > of the cpp macro is causing the comment to not have the intended effect. > I didn't dig into that. Nor did I try to change all the fallthru > comments to use the attribute -- just the two that implicit-fallthru was > complaining about. > > Verified that after this patch the two riscv targets build. Installed > on the trunk. > > Jeff > > commit 448373f1f2912228dc72605fb6f3343fd57023ee > Author: law <law@138bc75d-0d04-0410-961f-82ee72b054a4> > Date: Mon Mar 13 17:49:40 2017 +0000 > > * config/riscv/riscv.c (riscv_emit_float_compare): Use fallthru > attribute rather than comments. > > git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@246101 > 138bc75d-0d04-0410-961f-82ee72b054a4 > > diff --git a/gcc/ChangeLog b/gcc/ChangeLog > index 124dca3..e863cdf 100644 > --- a/gcc/ChangeLog > +++ b/gcc/ChangeLog > @@ -1,5 +1,8 @@ > 2017-03-13 Jeff Law <l...@redhat.com> > > + * config/riscv/riscv.c (riscv_emit_float_compare): Use fallthru > + attribute rather than comments. > + > * config/pdp11/pdp11.md (movmemhi): Adjust operand numbers to > match_scratch operand is highest. > > diff --git a/gcc/config/riscv/riscv.c b/gcc/config/riscv/riscv.c > index 89567f7..e5044ba 100644 > --- a/gcc/config/riscv/riscv.c > +++ b/gcc/config/riscv/riscv.c > @@ -2089,13 +2089,13 @@ riscv_emit_float_compare (enum rtx_code *code, rtx > *op0, rtx *op1) > > case UNLT: > std::swap (cmp_op0, cmp_op1); > - /* Fall through. */ > + __attribute__((fallthrough)); > > UNORDERED_COMPARISON(UNGT, le) > > case UNLE: > std::swap (cmp_op0, cmp_op1); > - /* Fall through. */ > + __attribute__((fallthrough)); > > UNORDERED_COMPARISON(UNGE, lt) > #undef UNORDERED_COMPARISON
Thanks!
