https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109279
--- Comment #14 from Vineet Gupta <vineet.gupta at linux dot dev> ---
(In reply to Andrew Pinski from comment #12)
> Here is something to look into:
> #define const1 0x0101010101010101ULL
> #define const0 const1
> unsigned long long f(unsigned long long occ, const unsigned int sq) {
> unsigned long long t= (const0)>>32<<32 ;
> unsigned long long t1= (unsigned int)(const0) ;
> asm("":"+r"(t));
> return t | t1;
> }
Before commit 2e886eef7f2
li a5,16842752
addi a5,a5,257
slli a0,a5,32
or a0,a0,a5
ret
With commit 2e886eef7f2
li a0,16842752
addi a0,a0,257
mv a5,a0
slli a0,a0,32
or a0,a0,a5
ret
With commit 2e886eef7f2 + in_splitter check removed from riscv_move_integer()
li a0,16842752
li a5,16842752
addi a5,a5,257
addi a0,a0,257
slli a0,a0,32
or a0,a0,a5
ret
