https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112483
--- Comment #16 from Xi Ruoyao <xry111 at gcc dot gnu.org> --- (In reply to Andrew Pinski from comment #12) > What about this patch: > ``` > diff --git a/gcc/simplify-rtx.cc b/gcc/simplify-rtx.cc > index 69d87579d9c..f3745d86aea 100644 > --- a/gcc/simplify-rtx.cc > +++ b/gcc/simplify-rtx.cc > @@ -4392,7 +4392,7 @@ simplify_ashift: > real_convert (&f1, mode, CONST_DOUBLE_REAL_VALUE (trueop1)); > rtx tmp = simplify_gen_unary (ABS, mode, op0, mode); > if (REAL_VALUE_NEGATIVE (f1)) > - tmp = simplify_gen_unary (NEG, mode, op0, mode); > + tmp = simplify_unary_operation (NEG, mode, tmp, mode); > return tmp; > } > if (GET_CODE (op0) == NEG || GET_CODE (op0) == ABS) > > ``` > > We only generate NEG if it simplifies from the ABS. Most likely due to > constants. I'm trying this out on LoongArch.
