[llvm] 2d0cab9 - [SLP][NFC]Add a test for extra shuffle emission, NFC.

[Alexey Bataev via llvm-commits]

Author: Alexey Bataev
Date: 2021-11-15T12:14:43-08:00
New Revision: 2d0cab9d3ddcc0d3a5ea1313316fa92df0caec07

URL: https://github.com/llvm/llvm-project/commit/2d0cab9d3ddcc0d3a5ea1313316fa92df0caec07
DIFF: https://github.com/llvm/llvm-project/commit/2d0cab9d3ddcc0d3a5ea1313316fa92df0caec07.diff

LOG: [SLP][NFC]Add a test for extra shuffle emission, NFC.

Added: 
    llvm/test/Transforms/SLPVectorizer/X86/diamond_broadcast_extra_shuffle.ll

Modified: 
    

Removed: 
    


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diff  --git a/llvm/test/Transforms/SLPVectorizer/X86/diamond_broadcast_extra_shuffle.ll b/llvm/test/Transforms/SLPVectorizer/X86/diamond_broadcast_extra_shuffle.ll
new file mode 100644
index 000000000000..accc40b927c4
--- /dev/null
+++ b/llvm/test/Transforms/SLPVectorizer/X86/diamond_broadcast_extra_shuffle.ll
@@ -0,0 +1,35 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
+; RUN: opt < %s -slp-vectorizer -S -mtriple=x86_64-unknown-linux -slp-threshold=-2 | FileCheck %s
+
+define i32 @diamond_broadcast(i32* noalias nocapture %B, i32* noalias nocapture %A) {
+; CHECK-LABEL: @diamond_broadcast(
+; CHECK-NEXT:  entry:
+; CHECK-NEXT:    [[LD:%.*]] = load i32, i32* [[A:%.*]], align 4
+; CHECK-NEXT:    [[ARRAYIDX9:%.*]] = getelementptr inbounds i32, i32* [[B:%.*]], i64 1
+; CHECK-NEXT:    [[ARRAYIDX15:%.*]] = getelementptr inbounds i32, i32* [[B]], i64 2
+; CHECK-NEXT:    [[TMP0:%.*]] = insertelement <4 x i32> poison, i32 [[LD]], i32 0
+; CHECK-NEXT:    [[SHUFFLE:%.*]] = shufflevector <4 x i32> [[TMP0]], <4 x i32> poison, <4 x i32> zeroinitializer
+; CHECK-NEXT:    [[SHUFFLE1:%.*]] = shufflevector <4 x i32> [[TMP0]], <4 x i32> poison, <4 x i32> <i32 0, i32 0, i32 0, i32 undef>
+; CHECK-NEXT:    [[TMP1:%.*]] = mul <4 x i32> [[SHUFFLE]], [[SHUFFLE1]]
+; CHECK-NEXT:    [[ARRAYIDX21:%.*]] = getelementptr inbounds i32, i32* [[B]], i64 3
+; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i32* [[B]] to <4 x i32>*
+; CHECK-NEXT:    store <4 x i32> [[TMP1]], <4 x i32>* [[TMP2]], align 4
+; CHECK-NEXT:    ret i32 0
+;
+entry:
+  %ld = load i32, i32* %A, align 4
+  %mul = mul i32 %ld, %ld
+  store i32 %mul, i32* %B, align 4
+  %mul8 = mul i32 %ld, %ld
+  %arrayidx9 = getelementptr inbounds i32, i32* %B, i64 1
+  store i32 %mul8, i32* %arrayidx9, align 4
+  %mul14 = mul i32 %ld, %ld
+  %arrayidx15 = getelementptr inbounds i32, i32* %B, i64 2
+  store i32 %mul14, i32* %arrayidx15, align 4
+  %mul20 = mul i32 %ld, undef
+  %arrayidx21 = getelementptr inbounds i32, i32* %B, i64 3
+  store i32 %mul20, i32* %arrayidx21, align 4
+  ret i32 0
+}
+
+