> Since this commit (r248678), I've noticed regressions on some arm targets. > Executed from: gcc.dg/tree-ssa/tree-ssa.exp > gcc.dg/tree-ssa/gen-vect-26.c scan-tree-dump-times vect "Alignment > of access forced using peeling" 1 > gcc.dg/tree-ssa/gen-vect-26.c scan-tree-dump-times vect > "Vectorizing an unaligned access" 0 > gcc.dg/tree-ssa/gen-vect-28.c scan-tree-dump-times vect "Alignment > of access forced using peeling" 1 > gcc.dg/tree-ssa/gen-vect-28.c scan-tree-dump-times vect > "Vectorizing an unaligned access" 0 > > For instance with --target arm-linux-gnueabihf --with-cpu=cortex-a5 > --with-fpu=vfpv3-d16-fp16 > (using cortex-a9+neon makes the test pass).
I do not have access to an arm machine for testing but could these regressions be "ok" as in we no longer perform peeling because costs for not peeling <= costs for peeling and we still vectorize? (Just guessing) Or are these real regressions that prevent vectorization? Does the "vectorized 1 loops" check fail? Regards Robin
