From 8c9ceecdc67732465e9f15b14105f7482ab7530e Mon Sep 17 00:00:00 2001
From: Sanjay Patel <spatel@rotateright.com>
Date: Wed, 3 Apr 2019 20:34:22 +0000
Subject: [PATCH] [x86] add test for disguised horizontal op; NFC

llvm-svn: 357630
---
 llvm/test/CodeGen/X86/haddsub-shuf.ll | 48 +++++++++++++++++++++++++++++++++++
 1 file changed, 48 insertions(+)

diff --git a/llvm/test/CodeGen/X86/haddsub-shuf.ll b/llvm/test/CodeGen/X86/haddsub-shuf.ll
index 0ece3fe..8ad11e7 100644
--- a/llvm/test/CodeGen/X86/haddsub-shuf.ll
+++ b/llvm/test/CodeGen/X86/haddsub-shuf.ll
@@ -313,6 +313,54 @@ define <2 x double> @hadd_v2f64(<2 x double> %a) {
   ret <2 x double> %shuf
 }
 
+define <2 x double> @hadd_v2f64_scalar_splat(<2 x double> %a) {
+; SSSE3_SLOW-LABEL: hadd_v2f64_scalar_splat:
+; SSSE3_SLOW:       # %bb.0:
+; SSSE3_SLOW-NEXT:    movapd %xmm0, %xmm1
+; SSSE3_SLOW-NEXT:    unpckhpd {{.*#+}} xmm1 = xmm1[1],xmm0[1]
+; SSSE3_SLOW-NEXT:    addsd %xmm0, %xmm1
+; SSSE3_SLOW-NEXT:    movddup {{.*#+}} xmm0 = xmm1[0,0]
+; SSSE3_SLOW-NEXT:    retq
+;
+; SSSE3_FAST-LABEL: hadd_v2f64_scalar_splat:
+; SSSE3_FAST:       # %bb.0:
+; SSSE3_FAST-NEXT:    haddpd %xmm0, %xmm0
+; SSSE3_FAST-NEXT:    movddup {{.*#+}} xmm0 = xmm0[0,0]
+; SSSE3_FAST-NEXT:    retq
+;
+; AVX1_SLOW-LABEL: hadd_v2f64_scalar_splat:
+; AVX1_SLOW:       # %bb.0:
+; AVX1_SLOW-NEXT:    vpermilpd {{.*#+}} xmm1 = xmm0[1,0]
+; AVX1_SLOW-NEXT:    vaddsd %xmm1, %xmm0, %xmm0
+; AVX1_SLOW-NEXT:    vmovddup {{.*#+}} xmm0 = xmm0[0,0]
+; AVX1_SLOW-NEXT:    retq
+;
+; AVX1_FAST-LABEL: hadd_v2f64_scalar_splat:
+; AVX1_FAST:       # %bb.0:
+; AVX1_FAST-NEXT:    vhaddpd %xmm0, %xmm0, %xmm0
+; AVX1_FAST-NEXT:    vmovddup {{.*#+}} xmm0 = xmm0[0,0]
+; AVX1_FAST-NEXT:    retq
+;
+; AVX2_SLOW-LABEL: hadd_v2f64_scalar_splat:
+; AVX2_SLOW:       # %bb.0:
+; AVX2_SLOW-NEXT:    vpermilpd {{.*#+}} xmm1 = xmm0[1,0]
+; AVX2_SLOW-NEXT:    vaddsd %xmm1, %xmm0, %xmm0
+; AVX2_SLOW-NEXT:    vmovddup {{.*#+}} xmm0 = xmm0[0,0]
+; AVX2_SLOW-NEXT:    retq
+;
+; AVX2_FAST-LABEL: hadd_v2f64_scalar_splat:
+; AVX2_FAST:       # %bb.0:
+; AVX2_FAST-NEXT:    vhaddpd %xmm0, %xmm0, %xmm0
+; AVX2_FAST-NEXT:    vmovddup {{.*#+}} xmm0 = xmm0[0,0]
+; AVX2_FAST-NEXT:    retq
+  %a0 = extractelement <2 x double> %a, i32 0
+  %a1 = extractelement <2 x double> %a, i32 1
+  %hop = fadd double %a0, %a1
+  %ins = insertelement <2 x double> undef, double %hop, i32 0
+  %shuf = shufflevector <2 x double> %ins, <2 x double> undef, <2 x i32> <i32 0, i32 0>
+  ret <2 x double> %shuf
+}
+
 define <4 x double> @hadd_v4f64(<4 x double> %a) {
 ; SSSE3_SLOW-LABEL: hadd_v4f64:
 ; SSSE3_SLOW:       # %bb.0:
-- 
2.7.4