66 lines
2.2 KiB
Diff
66 lines
2.2 KiB
Diff
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diff -Nurp a/gcc/testsuite/gcc.target/aarch64/pr94398.c b/gcc/testsuite/gcc.target/aarch64/pr94398.c
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--- a/gcc/testsuite/gcc.target/aarch64/pr94398.c 1970-01-01 08:00:00.000000000 +0800
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+++ b/gcc/testsuite/gcc.target/aarch64/pr94398.c 2020-04-17 17:15:58.176000000 +0800
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@@ -0,0 +1,24 @@
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+/* { dg-do compile } */
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+/* { dg-options "-O2 -ftree-loop-vectorize -funsafe-math-optimizations -march=armv8.2-a+sve -mstrict-align" } */
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+
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+float
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+foo(long n, float *x, int inc_x,
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+ float *y, int inc_y)
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+{
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+ float dot = 0.0;
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+ int ix = 0, iy = 0;
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+
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+ if (n < 0) {
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+ return dot;
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+ }
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+
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+ int i = 0;
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+ while (i < n) {
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+ dot += y[iy] * x[ix];
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+ ix += inc_x;
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+ iy += inc_y;
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+ i++;
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+ }
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+
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+ return dot;
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+}
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diff -Nurp a/gcc/tree-vect-stmts.c b/gcc/tree-vect-stmts.c
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--- a/gcc/tree-vect-stmts.c 2020-04-17 17:10:14.796000000 +0800
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+++ b/gcc/tree-vect-stmts.c 2020-04-17 17:15:08.611850850 +0800
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@@ -7025,8 +7025,14 @@ vectorizable_store (stmt_vec_info stmt_i
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auto_vec<tree> dr_chain (group_size);
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oprnds.create (group_size);
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- alignment_support_scheme
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- = vect_supportable_dr_alignment (first_dr_info, false);
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+ /* Gather-scatter accesses perform only component accesses, alignment
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+ is irrelevant for them. */
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+ if (memory_access_type == VMAT_GATHER_SCATTER)
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+ alignment_support_scheme = dr_unaligned_supported;
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+ else
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+ alignment_support_scheme
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+ = vect_supportable_dr_alignment (first_dr_info, false);
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+
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gcc_assert (alignment_support_scheme);
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vec_loop_masks *loop_masks
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= (loop_vinfo && LOOP_VINFO_FULLY_MASKED_P (loop_vinfo)
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@@ -8162,8 +8168,14 @@ vectorizable_load (stmt_vec_info stmt_in
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ref_type = reference_alias_ptr_type (DR_REF (first_dr_info->dr));
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}
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- alignment_support_scheme
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- = vect_supportable_dr_alignment (first_dr_info, false);
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+ /* Gather-scatter accesses perform only component accesses, alignment
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+ is irrelevant for them. */
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+ if (memory_access_type == VMAT_GATHER_SCATTER)
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+ alignment_support_scheme = dr_unaligned_supported;
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+ else
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+ alignment_support_scheme
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+ = vect_supportable_dr_alignment (first_dr_info, false);
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+
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gcc_assert (alignment_support_scheme);
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vec_loop_masks *loop_masks
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= (loop_vinfo && LOOP_VINFO_FULLY_MASKED_P (loop_vinfo)
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