On Fri, 2023-12-29 at 15:57 +0800, chenglulu wrote:
/* snip */
> > diff --git a/gcc/config/loongarch/loongarch.md
> > b/gcc/config/loongarch/loongarch.md
> /* snip */
> > +(define_insn_and_rewrite "simple_load"
> > + [(set (match_operand:LD_AT_LEAST_32_BIT 0 "register_operand" "=r,f")
> > +
在 2023/12/29 上午12:11, Xi Ruoyao 写道:
The problem with peephole2 is it uses a naive sliding-window algorithm
and misses many cases. For example:
float a[1];
float t() { return a[0] + a[8000]; }
is compiled to:
la.local$r13,a
la.local$r12,a+32768
fld.s
The problem with peephole2 is it uses a naive sliding-window algorithm
and misses many cases. For example:
float a[1];
float t() { return a[0] + a[8000]; }
is compiled to:
la.local$r13,a
la.local$r12,a+32768
fld.s $f1,$r13,0
fld.s $f0,$r12,-768
