Tejas Belagod <tejas.bela...@arm.com> writes: > From: Tejas Belagod <tbela...@arm.com> > > This PR optimizes an SVE intrinsics sequence where > svlasta (svptrue_pat_b8 (SV_VL1), x) > a scalar is selected based on a constant predicate and a variable vector. > This sequence is optimized to return the correspoding element of a NEON > vector. For eg. > svlasta (svptrue_pat_b8 (SV_VL1), x) > returns > umov w0, v0.b[1] > Likewise, > svlastb (svptrue_pat_b8 (SV_VL1), x) > returns > umov w0, v0.b[0] > This optimization only works provided the constant predicate maps to a range > that is within the bounds of a 128-bit NEON register. > > gcc/ChangeLog: > > PR target/96339 > * config/aarch64/aarch64-sve-builtins-base.cc (svlast_impl::fold): Fold > sve > calls that have a constant input predicate vector. > (svlast_impl::is_lasta): Query to check if intrinsic is svlasta. > (svlast_impl::is_lastb): Query to check if intrinsic is svlastb. > (svlast_impl::vect_all_same): Check if all vector elements are equal. > > gcc/testsuite/ChangeLog: > > PR target/96339 > * gcc.target/aarch64/sve/acle/general-c/svlast.c: New. > * gcc.target/aarch64/sve/acle/general-c/svlast128_run.c: New. > * gcc.target/aarch64/sve/acle/general-c/svlast256_run.c: New. > * gcc.target/aarch64/sve/pcs/return_4.c (caller_bf16): Fix asm > to expect optimized code for function body. > * gcc.target/aarch64/sve/pcs/return_4_128.c (caller_bf16): Likewise. > * gcc.target/aarch64/sve/pcs/return_4_256.c (caller_bf16): Likewise. > * gcc.target/aarch64/sve/pcs/return_4_512.c (caller_bf16): Likewise. > * gcc.target/aarch64/sve/pcs/return_4_1024.c (caller_bf16): Likewise. > * gcc.target/aarch64/sve/pcs/return_4_2048.c (caller_bf16): Likewise. > * gcc.target/aarch64/sve/pcs/return_5.c (caller_bf16): Likewise. > * gcc.target/aarch64/sve/pcs/return_5_128.c (caller_bf16): Likewise. > * gcc.target/aarch64/sve/pcs/return_5_256.c (caller_bf16): Likewise. > * gcc.target/aarch64/sve/pcs/return_5_512.c (caller_bf16): Likewise. > * gcc.target/aarch64/sve/pcs/return_5_1024.c (caller_bf16): Likewise. > * gcc.target/aarch64/sve/pcs/return_5_2048.c (caller_bf16): Likewise.
OK, thanks. Richard
