https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98981
--- Comment #5 from Jim Wilson ---
Neither of the two patches I mentioned in comment 1 can fix the problem by
themselves, as we still have a mix of SImode and DImode operations.
I looked at REE. It doesn't work because there is more than one
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98981
--- Comment #4 from Jim Wilson ---
With this testcase
extern void sub2 (void);
void
sub (int *i, int *j)
{
int k = *i + 1;
*j = k;
if (k == 0)
sub2 ();
}
Compiling without the riscv_rtx_cost patch, I get
lw a5,0(a0)
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98981
--- Comment #3 from Jim Wilson ---
I suppose cost model problems could explain why combine didn't do the
optimization. I didn't have a chance to look at that.
I still think there is a fundmental problem with how we represent SImode
operations,
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98981
Kito Cheng changed:
What|Removed |Added
CC||kito at gcc dot gnu.org
--- Comment #2
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98981
Jim Wilson changed:
What|Removed |Added
CC||wilson at gcc dot gnu.org
--- Comment #1
