* [PATCH] tree-optimization/115537 - ICE with SLP condition reduction vectorization
@ 2024-06-18 12:13 Richard Biener
0 siblings, 0 replies; only message in thread
From: Richard Biener @ 2024-06-18 12:13 UTC (permalink / raw)
To: gcc-patches
The condition rejecting "multiple-type" SLP condition reduction lacks
handling EXTRACT_LAST reductions.
Bootstrap and regtest in progress on x86_64-unknown-linux-gnu.
Richard.
PR tree-optimization/115537
* tree-vect-loop.cc (vectorizable_reduction): Also reject
SLP condition reductions of EXTRACT_LAST kind when multiple
statement copies are involved.
* gcc.dg/vect/pr115537.c: New testcase.
---
gcc/testsuite/gcc.dg/vect/pr115537.c | 19 +++++++++++++++++++
gcc/tree-vect-loop.cc | 5 +++--
2 files changed, 22 insertions(+), 2 deletions(-)
create mode 100644 gcc/testsuite/gcc.dg/vect/pr115537.c
diff --git a/gcc/testsuite/gcc.dg/vect/pr115537.c b/gcc/testsuite/gcc.dg/vect/pr115537.c
new file mode 100644
index 00000000000..99ed467feb8
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/vect/pr115537.c
@@ -0,0 +1,19 @@
+/* { dg-do compile } */
+/* { dg-additional-options "-mcpu=neoverse-n1" { target aarch64*-*-* } } */
+
+char *a;
+int b;
+void c()
+{
+ int d = 0, e = 0, f;
+ for (; f; ++f)
+ if (a[f] == 5)
+ ;
+ else if (a[f])
+ e = 1;
+ else
+ d = 1;
+ if (d)
+ if (e)
+ b = 0;
+}
diff --git a/gcc/tree-vect-loop.cc b/gcc/tree-vect-loop.cc
index 7c79e9da106..eeb75c09e91 100644
--- a/gcc/tree-vect-loop.cc
+++ b/gcc/tree-vect-loop.cc
@@ -8083,13 +8083,14 @@ vectorizable_reduction (loop_vec_info loop_vinfo,
if ((reduction_type == COND_REDUCTION
|| reduction_type == INTEGER_INDUC_COND_REDUCTION
- || reduction_type == CONST_COND_REDUCTION)
+ || reduction_type == CONST_COND_REDUCTION
+ || reduction_type == EXTRACT_LAST_REDUCTION)
&& slp_node
&& SLP_TREE_NUMBER_OF_VEC_STMTS (slp_node) > 1)
{
if (dump_enabled_p ())
dump_printf_loc (MSG_MISSED_OPTIMIZATION, vect_location,
- "multiple types in condition reduction reduction.\n");
+ "multiple types in condition reduction.\n");
return false;
}
--
2.35.3
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