On 6/6/19 1:42 AM, Claudiu Zissulescu wrote: > When optimizing for size, try to avoid using long immediate by > employing alternative (short) instructions. > > Ok to apply? > Claudiu > > gcc/ > xxxx-xx-xx Claudiu Zissulescu <claz...@synopsys.com> > > * config/arc/arc-protos.h (arc_check_ior_const): Declare. > (arc_split_ior): Likewise. > (arc_check_mov_const): Likewise. > (arc_split_mov_const): Likewise. > * config/arc/arc.c (arc_print_operand): Fix 'z' letter. > (arc_rtx_costs): Replace check Crr with Cax constraint. > (prepare_move_operands): Cleanup, remove unused code. > (arc_split_ior): New function. > (arc_check_ior_const): Likewise. > (arc_split_mov_const): Likewise. > (arc_check_mov_const): Likewise. > * config/arc/arc.md (movsi_insn): Restructure it, and convert it > in define_insn_and_split pattern. > (iorsi3): Likewise. > (mulsi3_v2): Add new matching variant. > (andsi3_i): Cleanup pattern. > (rotrsi3_cnt1): Update pattern. > (rotrsi3_cnt8): New pattern. > (ashlsi2_cnt8): Likewise. > (ashlsi2_cnt16): Likewise. > * config/arc/constraints.md (C0p): Update constraint. > (Crr): Remove it. > (C0x): New pattern. > (Cax): New pattern. > > testsuite/ > xxxx-xx-xx Claudiu Zissulescu <claz...@synopsys.com> > > * gcc.target/arc/and-cnst-size.c: New test. > * gcc.target/arc/mov-cnst-size.c: Likewise. > * gcc.target/arc/or-cnst-size.c: Likewise. > * gcc.target/arc/store-merge-1.c: Update test. > * gcc.target/arc/arc700-stld-hazard.c: Likewise. > * gcc.target/arc/cmem-1.c: Likewise. > * gcc.target/arc/cmem-2.c: Likewise. > * gcc.target/arc/cmem-3.c: Likewise. > * gcc.target/arc/cmem-4.c: Likewise. > * gcc.target/arc/cmem-5.c: Likewise. > * gcc.target/arc/cmem-6.c: Likewise. > * gcc.target/arc/loop-4.c: Likewise. > * gcc.target/arc/movh_cl-1.c: Likewise. > * gcc.target/arc/sdata-3.c: Likewise. > --- > > diff --git a/gcc/config/arc/arc.c b/gcc/config/arc/arc.c > index b49f2539408..f398c4a0086 100644 > --- a/gcc/config/arc/arc.c > +++ b/gcc/config/arc/arc.c > @@ -11457,6 +11429,198 @@ arc_memory_move_cost (machine_mode mode, > return (2 * GET_MODE_SIZE (mode)); > } > > +/* Split an OR instruction into multiple BSET/OR instructions in a > + tentative to avoid long immediate constants. The next strategies > + are employed when destination is 'q' reg. s/tentative/attempt/ ?
> + > + 1. if there are up to three bits set in the mask, a succesion of s/succesion/succession/ OK with the nits fixed. jeff
