https://gcc.gnu.org/g:e755f478c24c3e99409936af545ac83d35d27ad9
commit r15-319-ge755f478c24c3e99409936af545ac83d35d27ad9 Author: Stefan Schulze Frielinghaus <stefa...@linux.ibm.com> Date: Wed May 8 10:48:45 2024 +0200 tree-ssa-loop-prefetch.cc: Honour -fno-unroll-loops This fixes a couple of tests (gcc.dg/vect/pr109011-*.c) on s390 where loops are unrolled although -fno-unroll-loops is specified. gcc/ChangeLog: * tree-ssa-loop-prefetch.cc (determine_unroll_factor): Honour -fno-unroll-loops. Diff: --- gcc/tree-ssa-loop-prefetch.cc | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/gcc/tree-ssa-loop-prefetch.cc b/gcc/tree-ssa-loop-prefetch.cc index 70073cc4fe46..bb5d5dec7795 100644 --- a/gcc/tree-ssa-loop-prefetch.cc +++ b/gcc/tree-ssa-loop-prefetch.cc @@ -1401,6 +1401,10 @@ determine_unroll_factor (class loop *loop, struct mem_ref_group *refs, struct mem_ref_group *agp; struct mem_ref *ref; + /* Bail out early in case we must not unroll loops. */ + if (!flag_unroll_loops) + return 1; + /* First check whether the loop is not too large to unroll. We ignore PARAM_MAX_UNROLL_TIMES, because for small loops, it prevented us from unrolling them enough to make exactly one cache line covered by each