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| author | Manolis Tsamis <manolis.tsamis@vrull.eu> | 2023-11-01 12:27:28 +0100 |
|---|---|---|
| committer | Philipp Tomsich <philipp.tomsich@vrull.eu> | 2024-05-24 14:11:51 +0200 |
| commit | 6d6f324bda1ccb51cd43ff9d4d017eb71bb2d690 (patch) | |
| tree | 20558f0a6c4aaa12601d55fb4832eb99e3d7e35c | |
| parent | 7acd5d71547f74a2af35bab1b17a518197d25d23 (diff) | |
| download | gcc-6d6f324bda1ccb51cd43ff9d4d017eb71bb2d690.zip gcc-6d6f324bda1ccb51cd43ff9d4d017eb71bb2d690.tar.gz gcc-6d6f324bda1ccb51cd43ff9d4d017eb71bb2d690.tar.bz2 | |
MATCH: Look through VIEW_CONVERT when folding VEC_PERM_EXPRs.
The match.pd patterns to merge two vector permutes into one fail when a
potentially no-op view convert expressions is between the two permutes.
This change lifts this restriction.
gcc/ChangeLog:
* match.pd: Allow no-op view_convert between permutes.
gcc/testsuite/ChangeLog:
* gcc.dg/fold-perm-2.c: New test.
| -rw-r--r-- | gcc/match.pd | 14 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.dg/fold-perm-2.c | 16 |
2 files changed, 24 insertions, 6 deletions
diff --git a/gcc/match.pd b/gcc/match.pd index 7081d76..024e335 100644 --- a/gcc/match.pd +++ b/gcc/match.pd @@ -10082,19 +10082,21 @@ and, d = VEC_PERM_EXPR <a, b, NEW_VCST>; */ (simplify - (vec_perm (vec_perm@0 @1 @2 VECTOR_CST@3) @0 VECTOR_CST@4) + (vec_perm (view_convert?@0 (vec_perm@1 @2 @3 VECTOR_CST@4)) @0 VECTOR_CST@5) (if (TYPE_VECTOR_SUBPARTS (type).is_constant ()) (with { machine_mode result_mode = TYPE_MODE (type); - machine_mode op_mode = TYPE_MODE (TREE_TYPE (@1)); + machine_mode op_mode = TYPE_MODE (TREE_TYPE (@2)); int nelts = TYPE_VECTOR_SUBPARTS (type).to_constant (); vec_perm_builder builder0; vec_perm_builder builder1; vec_perm_builder builder2 (nelts, nelts, 1); } - (if (tree_to_vec_perm_builder (&builder0, @3) - && tree_to_vec_perm_builder (&builder1, @4)) + (if (tree_to_vec_perm_builder (&builder0, @4) + && tree_to_vec_perm_builder (&builder1, @5) + && TYPE_SIZE (TREE_TYPE (TREE_TYPE (@0))) + == TYPE_SIZE (TREE_TYPE (TREE_TYPE (@1)))) (with { vec_perm_indices sel0 (builder0, 2, nelts); @@ -10116,10 +10118,10 @@ and, ? (!can_vec_perm_const_p (result_mode, op_mode, sel0, false) || !can_vec_perm_const_p (result_mode, op_mode, sel1, false)) : !can_vec_perm_const_p (result_mode, op_mode, sel1, false))) - op0 = vec_perm_indices_to_tree (TREE_TYPE (@4), sel2); + op0 = vec_perm_indices_to_tree (TREE_TYPE (@5), sel2); } (if (op0) - (vec_perm @1 @2 { op0; }))))))) + (view_convert (vec_perm @2 @3 { op0; })))))))) /* Merge c = VEC_PERM_EXPR <a, b, VCST0>; diff --git a/gcc/testsuite/gcc.dg/fold-perm-2.c b/gcc/testsuite/gcc.dg/fold-perm-2.c new file mode 100644 index 0000000..1a4ab40 --- /dev/null +++ b/gcc/testsuite/gcc.dg/fold-perm-2.c @@ -0,0 +1,16 @@ +/* { dg-do compile } */ +/* { dg-options "-O -fdump-tree-fre1" } */ + +typedef int veci __attribute__ ((vector_size (4 * sizeof (int)))); +typedef unsigned int vecu __attribute__ ((vector_size (4 * sizeof (unsigned int)))); + +void fun (veci *a, veci *b, veci *c) +{ + veci r1 = __builtin_shufflevector (*a, *b, 0, 5, 2, 7); + vecu r2 = __builtin_convertvector (r1, vecu); + vecu r3 = __builtin_shufflevector (r2, r2, 2, 3, 1, 0); + *c = __builtin_convertvector (r3, veci); +} + +/* { dg-final { scan-tree-dump "VEC_PERM_EXPR.*{ 2, 7, 5, 0 }" "fre1" } } */ +/* { dg-final { scan-tree-dump-times "VEC_PERM_EXPR" 1 "fre1" } } */ |