[SLP][NFC]Add a test with incorrect final analysis for unsigned nodes, being used in signed nodes.

Author: alexey-bataev

llvm/test/Transforms/SLPVectorizer/RISCV/unsigned-node-trunc-with-signed-users.ll

@@ -0,0 +1,77 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 4
+; RUN: opt -S --passes=slp-vectorizer -mtriple=riscv64-unknown-linux -mattr=+v < %s | FileCheck %s
+
+define void @test(ptr %p, i16 %load794) {
+; CHECK-LABEL: define void @test(
+; CHECK-SAME: ptr [[P:%.*]], i16 [[LOAD794:%.*]]) #[[ATTR0:[0-9]+]] {
+; CHECK-NEXT:    [[ZEXT795:%.*]] = zext i16 [[LOAD794]] to i32
+; CHECK-NEXT:    [[GEP799:%.*]] = getelementptr inbounds i8, ptr [[P]], i64 16
+; CHECK-NEXT:    [[TMP1:%.*]] = load <2 x i16>, ptr [[P]], align 2
+; CHECK-NEXT:    [[TMP2:%.*]] = load <2 x i16>, ptr [[GEP799]], align 2
+; CHECK-NEXT:    [[TMP3:%.*]] = sub <2 x i16> [[TMP2]], [[TMP1]]
+; CHECK-NEXT:    [[TMP4:%.*]] = add <2 x i16> [[TMP3]], <i16 3329, i16 3329>
+; CHECK-NEXT:    [[TMP5:%.*]] = insertelement <2 x i32> poison, i32 [[ZEXT795]], i32 0
+; CHECK-NEXT:    [[TMP6:%.*]] = shufflevector <2 x i32> [[TMP5]], <2 x i32> poison, <2 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP7:%.*]] = trunc <2 x i32> [[TMP6]] to <2 x i16>
+; CHECK-NEXT:    [[TMP8:%.*]] = mul <2 x i16> [[TMP4]], [[TMP7]]
+; CHECK-NEXT:    [[TMP9:%.*]] = zext <2 x i16> [[TMP8]] to <2 x i64>
+; CHECK-NEXT:    [[TMP10:%.*]] = mul nuw nsw <2 x i64> [[TMP9]], <i64 5039, i64 5039>
+; CHECK-NEXT:    [[TMP11:%.*]] = lshr <2 x i64> [[TMP10]], <i64 24, i64 24>
+; CHECK-NEXT:    [[TMP12:%.*]] = trunc <2 x i64> [[TMP11]] to <2 x i16>
+; CHECK-NEXT:    [[TMP13:%.*]] = mul <2 x i16> [[TMP12]], <i16 -3329, i16 -3329>
+; CHECK-NEXT:    [[TMP14:%.*]] = add <2 x i16> [[TMP13]], [[TMP8]]
+; CHECK-NEXT:    [[TMP15:%.*]] = add <2 x i16> [[TMP14]], <i16 -3329, i16 -3329>
+; CHECK-NEXT:    [[TMP16:%.*]] = icmp slt <2 x i16> [[TMP15]], zeroinitializer
+; CHECK-NEXT:    [[TMP17:%.*]] = select <2 x i1> [[TMP16]], <2 x i16> [[TMP14]], <2 x i16> zeroinitializer
+; CHECK-NEXT:    [[TMP18:%.*]] = call <2 x i16> @llvm.smax.v2i16(<2 x i16> [[TMP15]], <2 x i16> zeroinitializer)
+; CHECK-NEXT:    [[TMP19:%.*]] = or <2 x i16> [[TMP17]], [[TMP18]]
+; CHECK-NEXT:    store <2 x i16> [[TMP19]], ptr [[P]], align 2
+; CHECK-NEXT:    ret void
+;
+  %zext795 = zext i16 %load794 to i32
+  %load798 = load i16, ptr %p, align 2
+  %gep799 = getelementptr inbounds i8, ptr %p, i64 16
+  %load800 = load i16, ptr %gep799, align 2
+  %zext801 = zext i16 %load798 to i32
+  %zext802 = zext i16 %load800 to i32
+  %sub809 = sub nsw i32 %zext802, %zext801
+  %add810 = add nsw i32 %sub809, 3329
+  %mul811 = mul i32 %add810, %zext795
+  %zext812 = zext i32 %mul811 to i64
+  %mul813 = mul nuw nsw i64 %zext812, 5039
+  %lshr814 = lshr i64 %mul813, 24
+  %trunc815 = trunc nuw nsw i64 %lshr814 to i32
+  %mul816 = mul i32 %trunc815, 62207
+  %add817 = add i32 %mul816, %mul811
+  %trunc818 = trunc i32 %add817 to i16
+  %add819 = add i16 %trunc818, -3329
+  %icmp820 = icmp slt i16 %add819, 0
+  %select821 = select i1 %icmp820, i16 %trunc818, i16 0
+  %call822 = call i16 @llvm.smax.i16(i16 %add819, i16 0)
+  %or823 = or i16 %select821, %call822
+  store i16 %or823, ptr %p, align 2
+  %gep826 = getelementptr inbounds i8, ptr %p, i64 2
+  %load827 = load i16, ptr %gep826, align 2
+  %gep828 = getelementptr inbounds i8, ptr %p, i64 18
+  %load829 = load i16, ptr %gep828, align 2
+  %zext830 = zext i16 %load827 to i32
+  %zext831 = zext i16 %load829 to i32
+  %sub838 = sub nsw i32 %zext831, %zext830
+  %add839 = add nsw i32 %sub838, 3329
+  %mul840 = mul i32 %add839, %zext795
+  %zext841 = zext i32 %mul840 to i64
+  %mul842 = mul nuw nsw i64 %zext841, 5039
+  %lshr843 = lshr i64 %mul842, 24
+  %trunc844 = trunc nuw nsw i64 %lshr843 to i32
+  %mul845 = mul i32 %trunc844, 62207
+  %add846 = add i32 %mul845, %mul840
+  %trunc847 = trunc i32 %add846 to i16
+  %add848 = add i16 %trunc847, -3329
+  %icmp849 = icmp slt i16 %add848, 0
+  %select850 = select i1 %icmp849, i16 %trunc847, i16 0
+  %call851 = call i16 @llvm.smax.i16(i16 %add848, i16 0)
+  %or852 = or i16 %select850, %call851
+  store i16 %or852, ptr %gep826, align 2
+  ret void
+}
+