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* [gcc r12-6523] [vect] PR103971, PR103977: Fix epilogue mode selection for autodetect only
@ 2022-01-12 14:45 Andre Simoes Dias Vieira
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From: Andre Simoes Dias Vieira @ 2022-01-12 14:45 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:016bd7523131b645bca5b5530c81ab5149922743
commit r12-6523-g016bd7523131b645bca5b5530c81ab5149922743
Author: Andre Vieira <andre.simoesdiasvieira@arm.com>
Date: Tue Jan 11 15:52:59 2022 +0000
[vect] PR103971, PR103977: Fix epilogue mode selection for autodetect only
gcc/ChangeLog:
* tree-vect-loop.c (vect-analyze-loop): Handle scenario where target
does not add autovectorize_vector_modes.
Diff:
---
gcc/tree-vect-loop.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/gcc/tree-vect-loop.c b/gcc/tree-vect-loop.c
index 6ed2b5f8724..ba67de490bb 100644
--- a/gcc/tree-vect-loop.c
+++ b/gcc/tree-vect-loop.c
@@ -3023,7 +3023,9 @@ vect_analyze_loop (class loop *loop, vec_info_shared *shared)
array may contain length-agnostic and length-specific modes. Their
ordering is not guaranteed, so we could end up picking a mode for the main
loop that is after the epilogue's optimal mode. */
- mode_i = 1;
+ vector_modes[0] = autodetected_vector_mode;
+ mode_i = 0;
+
bool supports_partial_vectors = partial_vectors_supported_p ();
poly_uint64 first_vinfo_vf = LOOP_VINFO_VECT_FACTOR (first_loop_vinfo);
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2022-01-12 14:45 [gcc r12-6523] [vect] PR103971, PR103977: Fix epilogue mode selection for autodetect only Andre Simoes Dias Vieira
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