[llvm] ac5081a - [SLP][NFC]Add a test with the missing matching of same nodes with reuses, NFC

[Alexey Bataev via llvm-commits]

Author: Alexey Bataev
Date: 2026-03-07T09:35:57-08:00
New Revision: ac5081a72ed52cef08d491f393314d0fc89fdd81

URL: https://github.com/llvm/llvm-project/commit/ac5081a72ed52cef08d491f393314d0fc89fdd81
DIFF: https://github.com/llvm/llvm-project/commit/ac5081a72ed52cef08d491f393314d0fc89fdd81.diff

LOG: [SLP][NFC]Add a test with the missing matching of same nodes with reuses, NFC

Added: 
    llvm/test/Transforms/SLPVectorizer/RISCV/same-node-reused.ll

Modified: 
    

Removed: 
    


################################################################################
diff  --git a/llvm/test/Transforms/SLPVectorizer/RISCV/same-node-reused.ll b/llvm/test/Transforms/SLPVectorizer/RISCV/same-node-reused.ll
new file mode 100644
index 0000000000000..fb76cfcdcef5f
--- /dev/null
+++ b/llvm/test/Transforms/SLPVectorizer/RISCV/same-node-reused.ll
@@ -0,0 +1,98 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 6
+; RUN: opt -passes=slp-vectorizer -S -mtriple=riscv64 -mattr=+m,+v -riscv-v-vector-bits-min=-1 -riscv-v-slp-max-vf=0 < %s | FileCheck %s
+
+define void @test(ptr %dest, ptr %p) {
+; CHECK-LABEL: define void @test(
+; CHECK-SAME: ptr [[DEST:%.*]], ptr [[P:%.*]]) #[[ATTR0:[0-9]+]] {
+; CHECK-NEXT:  [[ENTRY:.*:]]
+; CHECK-NEXT:    [[INC0:%.*]] = getelementptr inbounds i16, ptr [[P]], i64 1
+; CHECK-NEXT:    [[INC1:%.*]] = getelementptr inbounds i16, ptr [[P]], i64 2
+; CHECK-NEXT:    [[INC2:%.*]] = getelementptr inbounds i16, ptr [[P]], i64 3
+; CHECK-NEXT:    [[E1:%.*]] = load i16, ptr [[INC0]], align 2
+; CHECK-NEXT:    [[E3:%.*]] = load i16, ptr [[INC2]], align 2
+; CHECK-NEXT:    [[INC5:%.*]] = getelementptr inbounds i16, ptr [[DEST]], i64 2
+; CHECK-NEXT:    [[INC6:%.*]] = getelementptr inbounds i16, ptr [[DEST]], i64 3
+; CHECK-NEXT:    [[TMP0:%.*]] = call <3 x i16> @llvm.masked.load.v3i16.p0(ptr align 4 [[P]], <3 x i1> <i1 true, i1 false, i1 true>, <3 x i16> poison)
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <3 x i16> [[TMP0]], <3 x i16> poison, <2 x i32> <i32 0, i32 2>
+; CHECK-NEXT:    [[E2:%.*]] = load i16, ptr [[INC1]], align 2
+; CHECK-NEXT:    [[TMP2:%.*]] = add <2 x i16> [[TMP1]], [[TMP1]]
+; CHECK-NEXT:    [[A2:%.*]] = add i16 [[E2]], [[E2]]
+; CHECK-NEXT:    [[A3:%.*]] = add i16 [[E2]], [[E2]]
+; CHECK-NEXT:    store <2 x i16> [[TMP2]], ptr [[DEST]], align 4
+; CHECK-NEXT:    store i16 [[A2]], ptr [[INC5]], align 2
+; CHECK-NEXT:    store i16 [[A3]], ptr [[INC6]], align 2
+; CHECK-NEXT:    ret void
+;
+entry:
+  %inc0 = getelementptr inbounds i16, ptr %p, i64 1
+  %inc1 = getelementptr inbounds i16, ptr %p, i64 2
+  %inc2 = getelementptr inbounds i16, ptr %p, i64 3
+  %e0 = load i16, ptr %p, align 4
+  %e1 = load i16, ptr %inc0, align 2
+  %e2 = load i16, ptr %inc1, align 2
+  %e3 = load i16, ptr %inc2, align 2
+
+  %a0 = add i16 %e0, %e0
+  %a1 = add i16 %e2, %e2
+  %a2 = add i16 %e2, %e2
+  %a3 = add i16 %e2, %e2
+
+  %inc4 = getelementptr inbounds i16, ptr %dest, i64 1
+  %inc5 = getelementptr inbounds i16, ptr %dest, i64 2
+  %inc6 = getelementptr inbounds i16, ptr %dest, i64 3
+
+  store i16 %a0, ptr %dest, align 4
+  store i16 %a1, ptr %inc4, align 2
+  store i16 %a2, ptr %inc5, align 2
+  store i16 %a3, ptr %inc6, align 2
+  ret void
+}
+
+define void @test1(ptr %dest, ptr %p) {
+; CHECK-LABEL: define void @test1(
+; CHECK-SAME: ptr [[DEST:%.*]], ptr [[P:%.*]]) #[[ATTR0]] {
+; CHECK-NEXT:  [[ENTRY:.*:]]
+; CHECK-NEXT:    [[INC0:%.*]] = getelementptr inbounds i16, ptr [[P]], i64 1
+; CHECK-NEXT:    [[INC1:%.*]] = getelementptr inbounds i16, ptr [[P]], i64 2
+; CHECK-NEXT:    [[INC2:%.*]] = getelementptr inbounds i16, ptr [[P]], i64 3
+; CHECK-NEXT:    [[E0:%.*]] = load i16, ptr [[P]], align 4
+; CHECK-NEXT:    [[E1:%.*]] = load i16, ptr [[INC0]], align 2
+; CHECK-NEXT:    [[E2:%.*]] = load i16, ptr [[INC1]], align 2
+; CHECK-NEXT:    [[E3:%.*]] = load i16, ptr [[INC2]], align 2
+; CHECK-NEXT:    [[A0:%.*]] = add i16 [[E0]], [[E0]]
+; CHECK-NEXT:    [[A1:%.*]] = shl i16 [[E2]], 1
+; CHECK-NEXT:    [[A2:%.*]] = shl i16 [[E2]], 1
+; CHECK-NEXT:    [[A3:%.*]] = shl i16 [[E2]], 1
+; CHECK-NEXT:    [[INC4:%.*]] = getelementptr inbounds i16, ptr [[DEST]], i64 1
+; CHECK-NEXT:    [[INC5:%.*]] = getelementptr inbounds i16, ptr [[DEST]], i64 2
+; CHECK-NEXT:    [[INC6:%.*]] = getelementptr inbounds i16, ptr [[DEST]], i64 3
+; CHECK-NEXT:    store i16 [[A0]], ptr [[DEST]], align 4
+; CHECK-NEXT:    store i16 [[A1]], ptr [[INC4]], align 2
+; CHECK-NEXT:    store i16 [[A2]], ptr [[INC5]], align 2
+; CHECK-NEXT:    store i16 [[A3]], ptr [[INC6]], align 2
+; CHECK-NEXT:    ret void
+;
+entry:
+  %inc0 = getelementptr inbounds i16, ptr %p, i64 1
+  %inc1 = getelementptr inbounds i16, ptr %p, i64 2
+  %inc2 = getelementptr inbounds i16, ptr %p, i64 3
+  %e0 = load i16, ptr %p, align 4
+  %e1 = load i16, ptr %inc0, align 2
+  %e2 = load i16, ptr %inc1, align 2
+  %e3 = load i16, ptr %inc2, align 2
+
+  %a0 = add i16 %e0, %e0
+  %a1 = shl i16 %e2, 1
+  %a2 = shl i16 %e2, 1
+  %a3 = shl i16 %e2, 1
+
+  %inc4 = getelementptr inbounds i16, ptr %dest, i64 1
+  %inc5 = getelementptr inbounds i16, ptr %dest, i64 2
+  %inc6 = getelementptr inbounds i16, ptr %dest, i64 3
+
+  store i16 %a0, ptr %dest, align 4
+  store i16 %a1, ptr %inc4, align 2
+  store i16 %a2, ptr %inc5, align 2
+  store i16 %a3, ptr %inc6, align 2
+  ret void
+}