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Rather than hardcoding all combinations from the ELIMINABLE_REGS list, just do the correct check. ChangeLog: 2017-08-07 Wilco Dijkstra gcc/ * config/aarch64/aarch64.c (aarch64_can_eliminate): Simplify logic. -- diff --git a/gcc/config/aarch64/aarch64.c b/gcc/config/aarch64/aarch64.c index 9463edf63ffe770062b4120fada090e20c93a269..fbb4244cb58d2a25203aa27342c= 2f7988c30bd98 100644 --- a/gcc/config/aarch64/aarch64.c +++ b/gcc/config/aarch64/aarch64.c @@ -5858,26 +5858,12 @@ aarch64_secondary_reload (bool in_p ATTRIBUTE_UNUSE= D, rtx x, } =20 static bool -aarch64_can_eliminate (const int from, const int to) +aarch64_can_eliminate (const int from ATTRIBUTE_UNUSED, const int to) { - /* If we need a frame pointer, we must eliminate FRAME_POINTER_REGNUM in= to - HARD_FRAME_POINTER_REGNUM and not into STACK_POINTER_REGNUM. */ - + /* If we need a frame pointer, ARG_POINTER_REGNUM and FRAME_POINTER_REGN= UM + can only eliminate to HARD_FRAME_POINTER_REGNUM. */ if (frame_pointer_needed) - { - if (from =3D=3D ARG_POINTER_REGNUM && to =3D=3D HARD_FRAME_POINTER_R= EGNUM) - return true; - if (from =3D=3D ARG_POINTER_REGNUM && to =3D=3D STACK_POINTER_REGNUM) - return false; - if (from =3D=3D FRAME_POINTER_REGNUM && to =3D=3D STACK_POINTER_REGN= UM - && !cfun->calls_alloca) - return true; - if (from =3D=3D FRAME_POINTER_REGNUM && to =3D=3D HARD_FRAME_POINTER= _REGNUM) - return true; - - return false; - } - + return to =3D=3D HARD_FRAME_POINTER_REGNUM; return true; }