Hi, A long time ago, using a parallel to take a subreg of a SIMD register was broken. This temporary fix[1] (from 2003) spilled these registers to memory and reloaded the appropriate part to obtain the subreg.
The fix initially existed for the benefit of the PowerPC E500 - a platform for which GCC removed support a number of years ago. Regardless, a proper mechanism for taking a subreg of a SIMD register exists now anyway. This patch removes the workaround thus preventing SIMD registers being dumped to memory unnecessarily - which sometimes can't be fixed by later passes. Bootstrapped and regression tested on aarch64-none-linux-gnu and x86_64-pc-linux-gnu - no issues. Ok for master? Thanks, Jonathan [1] https://gcc.gnu.org/pipermail/gcc-patches/2003-April/102099.html --- gcc/ChangeLog: 2021-10-11 Jonathan Wright <jonathan.wri...@arm.com> * expr.c (emit_group_load_1): Remove historic workaround.
rb14923.patch
Description: rb14923.patch
