On Sun, Feb 10, 2019 at 10:42:55AM +0100, Christophe Lyon wrote:
> > 2019-02-08 Jakub Jelinek <ja...@redhat.com>
> >
> > PR bootstrap/88714
> > * config/arm/ldrdstrd.md (*arm_ldrd, *arm_strd): Use q constraint
> > instead of r.
> >
>
> Both this simple patch or the previous fix all the ICEs I reported, thanks.
>
> Of course, the scan-assembler failures remain to be fixed.
Thanks. Is the patch ok for trunk then (which one)?
There is yet another variant I guess, using =q constraint just on the
operand 0, because valid_operands_ldrd_strd requires that the first reg
is even and second one higher and as the only difference between q and r
(CORE_REGS vs. GENERAL_REGS) is the ip register which has regno 12, the
second operand must not be ip anyway.
> > --- gcc/config/arm/ldrdstrd.md.jj 2019-02-08 11:25:42.368916124 +0100
> > +++ gcc/config/arm/ldrdstrd.md 2019-02-08 12:38:33.647585108 +0100
> > @@ -157,9 +157,9 @@ (define_peephole2 ; swap the destination
> > ;; We use gen_operands_ldrd_strd() with a modify argument as false so that
> > the
> > ;; operands are not changed.
> > (define_insn "*arm_ldrd"
> > - [(parallel [(set (match_operand:SI 0 "s_register_operand" "=r")
> > + [(parallel [(set (match_operand:SI 0 "s_register_operand" "=q")
> > (match_operand:SI 2 "memory_operand" "m"))
> > - (set (match_operand:SI 1 "s_register_operand" "=r")
> > + (set (match_operand:SI 1 "s_register_operand" "=q")
> > (match_operand:SI 3 "memory_operand" "m"))])]
> > "TARGET_LDRD && TARGET_ARM && reload_completed
> > && valid_operands_ldrd_strd (operands, true)"
> > @@ -178,9 +178,9 @@ (define_insn "*arm_ldrd"
> >
> > (define_insn "*arm_strd"
> > [(parallel [(set (match_operand:SI 2 "memory_operand" "=m")
> > - (match_operand:SI 0 "s_register_operand" "r"))
> > + (match_operand:SI 0 "s_register_operand" "q"))
> > (set (match_operand:SI 3 "memory_operand" "=m")
> > - (match_operand:SI 1 "s_register_operand" "r"))])]
> > + (match_operand:SI 1 "s_register_operand" "q"))])]
> > "TARGET_LDRD && TARGET_ARM && reload_completed
> > && valid_operands_ldrd_strd (operands, false)"
> > {
Jakub
