[PATCH] tree-optimization/95271 - fix bswap vectorization invariant SLP type
Richard Biener
rguenther@suse.de
Mon May 25 11:09:30 GMT 2020
This properly updates invariant SLP nodes vector types for bswap
vectorization.
Bootstrapped / tested on x86_64-unknown-linux-gnu, applied.
2020-05-25 Richard Biener <rguenther@suse.de>
PR tree-optimization/95271
* tree-vect-stmts.c (vectorizable_bswap): Update invariant SLP
children vector type.
(vectorizable_call): Pass down slp ops.
* gcc.dg/vect/bb-slp-pr95271.c: New testcase.
---
gcc/testsuite/gcc.dg/vect/bb-slp-pr95271.c | 19 +++++++++++++++++++
gcc/tree-vect-stmts.c | 12 +++++++++++-
2 files changed, 30 insertions(+), 1 deletion(-)
create mode 100644 gcc/testsuite/gcc.dg/vect/bb-slp-pr95271.c
diff --git a/gcc/testsuite/gcc.dg/vect/bb-slp-pr95271.c b/gcc/testsuite/gcc.dg/vect/bb-slp-pr95271.c
new file mode 100644
index 00000000000..2f235980405
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/vect/bb-slp-pr95271.c
@@ -0,0 +1,19 @@
+/* { dg-do compile } */
+/* { dg-additional-options "-march=cooperlake" { target x86_64-*-* i?86-*-* } } */
+
+int a;
+struct b c;
+long d;
+struct b {
+ unsigned long address;
+ unsigned long e;
+};
+void f()
+{
+ d = (long)(&a)[0] << 56 | (long)((unsigned char *)&a)[1] << 48 |
+ (long)((unsigned char *)&a)[2] << 40 |
+ (long)((unsigned char *)&a)[3] << 32 |
+ (long)((unsigned char *)&a)[4] << 24 | ((unsigned char *)&a)[5] << 16 |
+ ((unsigned char *)&a)[6] << 8 | ((unsigned char *)&a)[7];
+ c.address = c.e = d;
+}
diff --git a/gcc/tree-vect-stmts.c b/gcc/tree-vect-stmts.c
index e7822c44951..9023dd4c216 100644
--- a/gcc/tree-vect-stmts.c
+++ b/gcc/tree-vect-stmts.c
@@ -3009,6 +3009,7 @@ static bool
vectorizable_bswap (vec_info *vinfo,
stmt_vec_info stmt_info, gimple_stmt_iterator *gsi,
stmt_vec_info *vec_stmt, slp_tree slp_node,
+ slp_tree *slp_op,
tree vectype_in, stmt_vector_for_cost *cost_vec)
{
tree op, vectype;
@@ -3051,6 +3052,15 @@ vectorizable_bswap (vec_info *vinfo,
if (! vec_stmt)
{
+ if (slp_node
+ && !vect_maybe_update_slp_op_vectype (slp_op[0], vectype_in))
+ {
+ if (dump_enabled_p ())
+ dump_printf_loc (MSG_MISSED_OPTIMIZATION, vect_location,
+ "incompatible vector types for invariants\n");
+ return false;
+ }
+
STMT_VINFO_TYPE (stmt_info) = call_vec_info_type;
DUMP_VECT_SCOPE ("vectorizable_bswap");
if (! slp_node)
@@ -3377,7 +3387,7 @@ vectorizable_call (vec_info *vinfo,
|| gimple_call_builtin_p (stmt, BUILT_IN_BSWAP32)
|| gimple_call_builtin_p (stmt, BUILT_IN_BSWAP64)))
return vectorizable_bswap (vinfo, stmt_info, gsi, vec_stmt, slp_node,
- vectype_in, cost_vec);
+ slp_op, vectype_in, cost_vec);
else
{
if (dump_enabled_p ())
--
2.25.1
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