From 0b1c9e8e9a43f17d9636ee89ac5716da954d1581 Mon Sep 17 00:00:00 2001
From: Simon Pilgrim <llvm-dev@redking.me.uk>
Date: Thu, 7 Apr 2022 13:36:37 +0100
Subject: [PATCH] [X86] Add test case for PR44795

---
 .../CodeGen/X86/vector-shuffle-fast-per-lane.ll    | 26 ++++++++++++++++++++++
 1 file changed, 26 insertions(+)
 create mode 100644 llvm/test/CodeGen/X86/vector-shuffle-fast-per-lane.ll

diff --git a/llvm/test/CodeGen/X86/vector-shuffle-fast-per-lane.ll b/llvm/test/CodeGen/X86/vector-shuffle-fast-per-lane.ll
new file mode 100644
index 0000000..00b0796
--- /dev/null
+++ b/llvm/test/CodeGen/X86/vector-shuffle-fast-per-lane.ll
@@ -0,0 +1,26 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: llc < %s -mtriple=x86_64-unknown -mattr=+avx2 | FileCheck %s --check-prefixes=SLOW
+; RUN: llc < %s -mtriple=x86_64-unknown -mattr=+avx512f | FileCheck %s --check-prefixes=SLOW
+; RUN: llc < %s -mtriple=x86_64-unknown -mattr=+avx2,+fast-variable-perlane-shuffle | FileCheck %s --check-prefixes=FAST
+; RUN: llc < %s -mtriple=x86_64-unknown -mattr=+avx512f,+fast-variable-perlane-shuffle | FileCheck %s --check-prefixes=FAST
+;
+; RUN: llc < %s -mtriple=x86_64-unknown -mcpu=znver1 | FileCheck %s --check-prefixes=SLOW
+; RUN: llc < %s -mtriple=x86_64-unknown -mcpu=znver2 | FileCheck %s --check-prefixes=SLOW
+; RUN: llc < %s -mtriple=x86_64-unknown -mcpu=znver3 | FileCheck %s --check-prefixes=FAST
+; RUN: llc < %s -mtriple=x86_64-unknown -mcpu=haswell | FileCheck %s --check-prefixes=FAST
+; RUN: llc < %s -mtriple=x86_64-unknown -mcpu=skx | FileCheck %s --check-prefixes=FAST
+
+define <32 x i8> @PR44795(<32 x i8> %a0) {
+; SLOW-LABEL: PR44795:
+; SLOW:       # %bb.0:
+; SLOW-NEXT:    vpshuflw {{.*#+}} ymm0 = ymm0[0,0,2,2,4,5,6,7,8,8,10,10,12,13,14,15]
+; SLOW-NEXT:    vpshufhw {{.*#+}} ymm0 = ymm0[0,1,2,3,4,4,6,6,8,9,10,11,12,12,14,14]
+; SLOW-NEXT:    retq
+;
+; FAST-LABEL: PR44795:
+; FAST:       # %bb.0:
+; FAST-NEXT:    vpshufb {{.*#+}} ymm0 = ymm0[0,1,0,1,4,5,4,5,8,9,8,9,12,13,12,13,16,17,16,17,20,21,20,21,24,25,24,25,28,29,28,29]
+; FAST-NEXT:    retq
+  %r = shufflevector <32 x i8> %a0, <32 x i8> poison, <32 x i32> <i32 0, i32 1, i32 0, i32 1, i32 4, i32 5, i32 4, i32 5, i32 8, i32 9, i32 8, i32 9, i32 12, i32 13, i32 12, i32 13, i32 16, i32 17, i32 16, i32 17, i32 20, i32 21, i32 20, i32 21, i32 24, i32 25, i32 24, i32 25, i32 28, i32 29, i32 28, i32 29>
+  ret <32 x i8> %r
+}
-- 
2.7.4