[SLP][NFC] Add a test with the optimistic extractelements emission, NFC#201192
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alexey-bataev merged 1 commit intoJun 2, 2026
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@llvm/pr-subscribers-llvm-transforms Author: Alexey Bataev (alexey-bataev) Changes1 Files Affected:
diff --git a/llvm/test/Transforms/SLPVectorizer/ARM/extract-cost-scale-nullptr-user.ll b/llvm/test/Transforms/SLPVectorizer/ARM/extract-cost-scale-nullptr-user.ll
new file mode 100644
index 0000000000000..d6cab1545784b
--- /dev/null
+++ b/llvm/test/Transforms/SLPVectorizer/ARM/extract-cost-scale-nullptr-user.ll
@@ -0,0 +1,71 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 6
+; RUN: opt -passes=slp-vectorizer -mtriple=thumbv8.1m.main-unknown-none-eabihf -S -mattr=+mve < %s | FileCheck %s
+
+define void @test(ptr %p) {
+; CHECK-LABEL: define void @test(
+; CHECK-SAME: ptr [[P:%.*]]) #[[ATTR0:[0-9]+]] {
+; CHECK-NEXT: [[ENTRY:.*]]:
+; CHECK-NEXT: br label %[[LOOP:.*]]
+; CHECK: [[LOOP]]:
+; CHECK-NEXT: [[IV:%.*]] = phi i32 [ 0, %[[ENTRY]] ], [ [[NIV:%.*]], %[[LOOP]] ]
+; CHECK-NEXT: [[TMP0:%.*]] = phi <4 x i32> [ zeroinitializer, %[[ENTRY]] ], [ [[TMP2:%.*]], %[[LOOP]] ]
+; CHECK-NEXT: [[TMP1:%.*]] = extractelement <4 x i32> [[TMP0]], i32 3
+; CHECK-NEXT: [[A0:%.*]] = getelementptr i8, ptr [[P]], i32 [[TMP1]]
+; CHECK-NEXT: store i8 0, ptr [[A0]], align 1
+; CHECK-NEXT: [[A1:%.*]] = getelementptr i8, ptr [[P]], i32 [[TMP1]]
+; CHECK-NEXT: store i8 1, ptr [[A1]], align 1
+; CHECK-NEXT: [[A2:%.*]] = getelementptr i8, ptr [[P]], i32 [[TMP1]]
+; CHECK-NEXT: store i8 2, ptr [[A2]], align 1
+; CHECK-NEXT: [[A3:%.*]] = getelementptr i8, ptr [[P]], i32 [[TMP1]]
+; CHECK-NEXT: store i8 3, ptr [[A3]], align 1
+; CHECK-NEXT: [[A4:%.*]] = getelementptr i8, ptr [[P]], i32 [[TMP1]]
+; CHECK-NEXT: store i8 4, ptr [[A4]], align 1
+; CHECK-NEXT: [[A5:%.*]] = getelementptr i8, ptr [[P]], i32 [[TMP1]]
+; CHECK-NEXT: store i8 5, ptr [[A5]], align 1
+; CHECK-NEXT: [[A6:%.*]] = getelementptr i8, ptr [[P]], i32 [[TMP1]]
+; CHECK-NEXT: store i8 6, ptr [[A6]], align 1
+; CHECK-NEXT: [[A7:%.*]] = getelementptr i8, ptr [[P]], i32 [[TMP1]]
+; CHECK-NEXT: store i8 7, ptr [[A7]], align 1
+; CHECK-NEXT: [[TMP2]] = add nuw nsw <4 x i32> [[TMP0]], <i32 32, i32 32, i32 32, i32 16>
+; CHECK-NEXT: [[NIV]] = add nuw nsw i32 [[IV]], 16
+; CHECK-NEXT: [[C:%.*]] = icmp eq i32 [[NIV]], 512
+; CHECK-NEXT: br i1 [[C]], label %[[EXIT:.*]], label %[[LOOP]]
+; CHECK: [[EXIT]]:
+; CHECK-NEXT: ret void
+;
+entry:
+ br label %loop
+
+loop:
+ %i0 = phi i32 [ 0, %entry ], [ %n0, %loop ]
+ %i1 = phi i32 [ 0, %entry ], [ %n1, %loop ]
+ %i2 = phi i32 [ 0, %entry ], [ %n2, %loop ]
+ %i3 = phi i32 [ 0, %entry ], [ %n3, %loop ]
+ %iv = phi i32 [ 0, %entry ], [ %niv, %loop ]
+ %a0 = getelementptr i8, ptr %p, i32 %i1
+ store i8 0, ptr %a0, align 1
+ %a1 = getelementptr i8, ptr %p, i32 %i1
+ store i8 1, ptr %a1, align 1
+ %a2 = getelementptr i8, ptr %p, i32 %i1
+ store i8 2, ptr %a2, align 1
+ %a3 = getelementptr i8, ptr %p, i32 %i1
+ store i8 3, ptr %a3, align 1
+ %a4 = getelementptr i8, ptr %p, i32 %i1
+ store i8 4, ptr %a4, align 1
+ %a5 = getelementptr i8, ptr %p, i32 %i1
+ store i8 5, ptr %a5, align 1
+ %a6 = getelementptr i8, ptr %p, i32 %i1
+ store i8 6, ptr %a6, align 1
+ %a7 = getelementptr i8, ptr %p, i32 %i1
+ store i8 7, ptr %a7, align 1
+ %n0 = add nuw nsw i32 %i0, 32
+ %n1 = add nuw nsw i32 %i1, 16
+ %n2 = add nuw nsw i32 %i2, 32
+ %n3 = add nuw nsw i32 %i3, 32
+ %niv = add nuw nsw i32 %iv, 16
+ %c = icmp eq i32 %niv, 512
+ br i1 %c, label %exit, label %loop
+
+exit:
+ ret void
+}
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…emission, NFC Reviewers: Pull Request: llvm/llvm-project#201192
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…emission, NFC Reviewers: Pull Request: llvm/llvm-project#201192
yingopq
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Reviewers: Pull Request: llvm#201192
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