https://gcc.gnu.org/g:a8ddf80c197653b77b6b4b52f20739404db5b2ef
commit a8ddf80c197653b77b6b4b52f20739404db5b2ef
Author: Michael Meissner <meiss...@linux.ibm.com>
Date: Sun Oct 6 01:46:46 2024 -0400
Update ChangeLog.*
Diff:
---
gcc/ChangeLog.bugs | 52 +++++++++++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 51 insertions(+), 1 deletion(-)
diff --git a/gcc/ChangeLog.bugs b/gcc/ChangeLog.bugs
index 2d17e8b98a1e..52fbbd344388 100644
--- a/gcc/ChangeLog.bugs
+++ b/gcc/ChangeLog.bugs
@@ -1,6 +1,56 @@
+==================== Branch work180-bugs, patch #200 ====================
+
+PR 99293: Optimize splat of a V2DF/V2DI extract with constant element
+
+We had optimizations for splat of a vector extract for the other vector
+types, but we missed having one for V2DI and V2DF. This patch adds a
+combiner insn to do this optimization.
+
+In looking at the source, we had similar optimizations for V4SI and V4SF
+extract and splats, but we missed doing V2DI/V2DF.
+
+Without the patch for the code:
+
+ vector long long splat_dup_l_0 (vector long long v)
+ {
+ return __builtin_vec_splats (__builtin_vec_extract (v, 0));
+ }
+
+the compiler generates (on a little endian power9):
+
+ splat_dup_l_0:
+ mfvsrld 9,34
+ mtvsrdd 34,9,9
+ blr
+
+Now it generates:
+
+ splat_dup_l_0:
+ xxpermdi 34,34,34,3
+ blr
+
+2024-10-06 Michael Meissner <meiss...@linux.ibm.com>
+
+gcc/
+
+ * config/rs6000/vsx.md (vsx_splat_extract_<mode>): New insn.
+
+gcc/testsuite/
+
+ * gcc.target/powerpc/builtins-1.c: Adjust insn count.
+ * gcc.target/powerpc/pr99293.c: New test.
+
==================== Branch work180-bugs, baseline ====================
+Add ChangeLog.bugs and update REVISION.
+
+2024-10-05 Michael Meissner <meiss...@linux.ibm.com>
+
+gcc/
+
+ * ChangeLog.bugs: New file for branch.
+ * REVISION: Update.
+
2024-10-05 Michael Meissner <meiss...@linux.ibm.com>
Clone branch
-
