From: Sanjay Patel <spatel@rotateright.com>
Date: Mon, 8 Jul 2019 14:49:21 +0000 (+0000)
Subject: [InstCombine] add tests for splat shuffles; NFC
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=4fa3098716a1b6377d44bc0188475795b7123222;p=llvm

[InstCombine] add tests for splat shuffles; NFC

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@365325 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/test/Transforms/InstCombine/insert-extract-shuffle.ll b/test/Transforms/InstCombine/insert-extract-shuffle.ll
index 2de9c66d463..e6fc0129614 100644
--- a/test/Transforms/InstCombine/insert-extract-shuffle.ll
+++ b/test/Transforms/InstCombine/insert-extract-shuffle.ll
@@ -425,3 +425,46 @@ define <5 x float> @insert_not_undef_shuffle_translate_commute_lengthen(float %x
   ret <5 x float> %r
 }
 
+define <4 x float> @insert_nonzero_index_splat(float %x) {
+; CHECK-LABEL: @insert_nonzero_index_splat(
+; CHECK-NEXT:    [[XV:%.*]] = insertelement <4 x float> undef, float [[X:%.*]], i32 2
+; CHECK-NEXT:    [[SPLAT:%.*]] = shufflevector <4 x float> [[XV]], <4 x float> undef, <4 x i32> <i32 undef, i32 2, i32 2, i32 undef>
+; CHECK-NEXT:    ret <4 x float> [[SPLAT]]
+;
+  %xv = insertelement <4 x float> undef, float %x, i32 2
+  %splat = shufflevector <4 x float> %xv, <4 x float> undef, <4 x i32> <i32 undef, i32 2, i32 2, i32 undef>
+  ret <4 x float> %splat
+}
+
+define <3 x double> @insert_nonzero_index_splat_narrow(double %x) {
+; CHECK-LABEL: @insert_nonzero_index_splat_narrow(
+; CHECK-NEXT:    ret <3 x double> undef
+;
+  %xv = insertelement <4 x double> undef, double %x, i32 4
+  %splat = shufflevector <4 x double> %xv, <4 x double> undef, <3 x i32> <i32 4, i32 undef, i32 4>
+  ret <3 x double> %splat
+}
+
+define <5 x i7> @insert_nonzero_index_splat_widen(i7 %x) {
+; CHECK-LABEL: @insert_nonzero_index_splat_widen(
+; CHECK-NEXT:    [[XV:%.*]] = insertelement <4 x i7> undef, i7 [[X:%.*]], i32 1
+; CHECK-NEXT:    [[SPLAT:%.*]] = shufflevector <4 x i7> [[XV]], <4 x i7> undef, <5 x i32> <i32 undef, i32 1, i32 1, i32 undef, i32 1>
+; CHECK-NEXT:    ret <5 x i7> [[SPLAT]]
+;
+  %xv = insertelement <4 x i7> undef, i7 %x, i32 1
+  %splat = shufflevector <4 x i7> %xv, <4 x i7> undef, <5 x i32> <i32 undef, i32 1, i32 1, i32 undef, i32 1>
+  ret <5 x i7> %splat
+}
+
+define <4 x float> @insert_nonzero_index_splat_extra_use(float %x) {
+; CHECK-LABEL: @insert_nonzero_index_splat_extra_use(
+; CHECK-NEXT:    [[XV:%.*]] = insertelement <4 x float> undef, float [[X:%.*]], i32 2
+; CHECK-NEXT:    call void @use(<4 x float> [[XV]])
+; CHECK-NEXT:    [[SPLAT:%.*]] = shufflevector <4 x float> [[XV]], <4 x float> undef, <4 x i32> <i32 undef, i32 2, i32 2, i32 undef>
+; CHECK-NEXT:    ret <4 x float> [[SPLAT]]
+;
+  %xv = insertelement <4 x float> undef, float %x, i32 2
+  call void @use(<4 x float> %xv)
+  %splat = shufflevector <4 x float> %xv, <4 x float> undef, <4 x i32> <i32 undef, i32 2, i32 2, i32 undef>
+  ret <4 x float> %splat
+}