[SLP][NFC]Add a test with incorrect casting of shuffled gathered values, NFC.

Author: alexey-bataev

llvm/test/Transforms/SLPVectorizer/RISCV/shuffled-gather-casted.ll

@@ -0,0 +1,55 @@
+; 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-gnu -mattr=+v < %s | FileCheck %s
+
+define i32 @test(ptr %p) {
+; CHECK-LABEL: define i32 @test(
+; CHECK-SAME: ptr [[P:%.*]]) #[[ATTR0:[0-9]+]] {
+; CHECK-NEXT:  entry:
+; CHECK-NEXT:    [[D_0:%.*]] = load i16, ptr [[P]], align 4
+; CHECK-NEXT:    [[TMP0:%.*]] = insertelement <4 x i16> <i16 0, i16 poison, i16 0, i16 0>, i16 [[D_0]], i32 1
+; CHECK-NEXT:    [[TMP1:%.*]] = or <4 x i16> [[TMP0]], zeroinitializer
+; CHECK-NEXT:    [[TMP2:%.*]] = and <4 x i16> [[TMP1]], zeroinitializer
+; CHECK-NEXT:    [[TMP3:%.*]] = sext <4 x i16> [[TMP0]] to <4 x i32>
+; CHECK-NEXT:    [[TMP4:%.*]] = shufflevector <4 x i32> [[TMP3]], <4 x i32> <i32 0, i32 poison, i32 0, i32 0>, <4 x i32> <i32 4, i32 1, i32 6, i32 7>
+; CHECK-NEXT:    [[TMP5:%.*]] = icmp sgt <4 x i32> [[TMP4]], zeroinitializer
+; CHECK-NEXT:    [[TMP6:%.*]] = select <4 x i1> [[TMP5]], <4 x i16> [[TMP2]], <4 x i16> <i16 0, i16 2, i16 0, i16 0>
+; CHECK-NEXT:    [[TMP7:%.*]] = call i16 @llvm.vector.reduce.umax.v4i16(<4 x i16> [[TMP6]])
+; CHECK-NEXT:    [[TMP8:%.*]] = zext i16 [[TMP7]] to i32
+; CHECK-NEXT:    [[TMP9:%.*]] = call i32 @llvm.umax.i32(i32 [[TMP8]], i32 1)
+; CHECK-NEXT:    ret i32 [[TMP9]]
+;
+entry:
+  %d.0 = load i16, ptr %p, align 4
+  %zext.d.0 = zext i16 %d.0 to i32
+  %zero.0 = zext i16 0 to i32
+  %zero.1 = zext i16 0 to i32
+  %zero.2 = zext i16 0 to i32
+
+  %or.d.0 = or i32 %zext.d.0, 0
+  %or.zero.0 = or i32 %zero.0, 0
+  %or.zero.1 = or i32 %zero.1, 0
+  %or.zero.2 = or i32 %zero.2, 0
+
+  %zero.d.0 = and i32 %or.d.0, 0
+  %and.zero.0 = and i32 %or.zero.0, 0
+  %and.zero.1 = and i32 %or.zero.1, 0
+  %and.zero.2 = and i32 %or.zero.2, 0
+
+  %d.0.gt.0 = icmp sgt i32 %zext.d.0, 0
+  %false.0 = icmp sgt i32 0, 0
+  %false.1 = icmp sgt i32 0, 0
+  %false.2 = icmp sgt i32 0, 0
+
+  %select.0.2 = select i1 %d.0.gt.0, i32 %zero.d.0, i32 2
+  %select.1.0 = select i1 %false.0, i32 %and.zero.0, i32 0
+  %select.2.0 = select i1 %false.1, i32 %and.zero.1, i32 0
+  %select.3.0 = select i1 %false.2, i32 %and.zero.2, i32 0
+
+  %max.0 = call i32 @llvm.umax.i32(i32 %select.0.2, i32 %select.1.0)
+  %max.1 = call i32 @llvm.umax.i32(i32 %max.0, i32 %select.2.0)
+  %max.2 = call i32 @llvm.umax.i32(i32 %max.1, i32 %select.3.0)
+  %max.3 = call i32 @llvm.umax.i32(i32 %max.2, i32 1)
+
+  ret i32 %max.3
+}
+