[SLP][NFC]Fix UB and constant folded ops in test, NFC

Author: alexey-bataev

llvm/test/Transforms/SLPVectorizer/AArch64/div-like-mixed-with-undefs.ll

@@ -1,21 +1,21 @@
 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 6
 ; RUN: opt -passes=slp-vectorizer -S -slp-threshold=-100 -mtriple=aarch64-unknown-linux-gnu < %s | FileCheck %s
 
-define ptr @test(ptr %d) {
+define ptr @test(ptr %d, i64 %v) {
 ; CHECK-LABEL: define ptr @test(
-; CHECK-SAME: ptr [[D:%.*]]) {
+; CHECK-SAME: ptr [[D:%.*]], i64 [[V:%.*]]) {
 ; CHECK-NEXT:  [[ENTRY:.*:]]
-; CHECK-NEXT:    [[TMP0:%.*]] = load i8, ptr null, align 1
+; CHECK-NEXT:    [[TMP0:%.*]] = load i8, ptr [[D]], align 1
 ; CHECK-NEXT:    [[CMP4_2:%.*]] = icmp eq i8 [[TMP0]], 0
-; CHECK-NEXT:    [[TMP1:%.*]] = select i1 [[CMP4_2]], i64 0, i64 0
-; CHECK-NEXT:    [[TMP2:%.*]] = xor i64 0, 0
-; CHECK-NEXT:    [[TMP3:%.*]] = udiv i64 [[TMP2]], 0
-; CHECK-NEXT:    [[TMP4:%.*]] = udiv i64 1, 0
+; CHECK-NEXT:    [[TMP1:%.*]] = select i1 [[CMP4_2]], i64 0, i64 4
+; CHECK-NEXT:    [[TMP2:%.*]] = xor i64 0, [[V]]
+; CHECK-NEXT:    [[TMP3:%.*]] = udiv i64 [[TMP2]], 3
+; CHECK-NEXT:    [[TMP4:%.*]] = udiv i64 1, [[V]]
 ; CHECK-NEXT:    [[TMP5:%.*]] = insertelement <6 x i64> poison, i64 [[TMP1]], i32 0
 ; CHECK-NEXT:    [[TMP6:%.*]] = insertelement <6 x i64> [[TMP5]], i64 [[TMP3]], i32 1
 ; CHECK-NEXT:    [[TMP7:%.*]] = insertelement <6 x i64> [[TMP6]], i64 [[TMP4]], i32 4
 ; CHECK-NEXT:    [[TMP8:%.*]] = shufflevector <6 x i64> [[TMP7]], <6 x i64> poison, <6 x i32> <i32 0, i32 1, i32 0, i32 1, i32 4, i32 4>
-; CHECK-NEXT:    [[TMP9:%.*]] = mul <6 x i64> [[TMP8]], <i64 2, i64 6, i64 1, i64 1, i64 1, i64 0>
+; CHECK-NEXT:    [[TMP9:%.*]] = mul <6 x i64> [[TMP8]], <i64 2, i64 6, i64 4, i64 3, i64 5, i64 4>
 ; CHECK-NEXT:    [[TMP10:%.*]] = extractelement <6 x i64> [[TMP9]], i32 0
 ; CHECK-NEXT:    [[TMP11:%.*]] = getelementptr i8, ptr [[D]], i64 [[TMP10]]
 ; CHECK-NEXT:    [[TMP12:%.*]] = extractelement <6 x i64> [[TMP9]], i32 1
@@ -31,23 +31,23 @@ define ptr @test(ptr %d) {
 ; CHECK-NEXT:    ret ptr [[TMP20]]
 ;
 entry:
-  %0 = load i8, ptr null, align 1
+  %0 = load i8, ptr %d, align 1
   %cmp4.2 = icmp eq i8 %0, 0
-  %1 = select i1 %cmp4.2, i64 0, i64 0
+  %1 = select i1 %cmp4.2, i64 0, i64 4
   %2 = shl i64 %1, 1
   %3 = getelementptr i8, ptr %d, i64 %2
-  %4 = xor i64 0, 0
-  %5 = udiv i64 %4, 0
+  %4 = xor i64 0, %v
+  %5 = udiv i64 %4, 3
   %6 = mul i64 %5, 6
   %7 = getelementptr i8, ptr %d, i64 %6
-  %8 = shl i64 %1, 0
+  %8 = shl i64 %1, 2
   %scevgep42 = getelementptr i8, ptr %d, i64 %8
-  %9 = mul i64 %5, 1
+  %9 = mul i64 %5, 3
   %10 = getelementptr i8, ptr %d, i64 %9
-  %11 = udiv i64 1, 0
-  %12 = mul i64 %11, 1
+  %11 = udiv i64 1, %v
+  %12 = mul i64 %11, 5
   %13 = getelementptr i8, ptr %d, i64 %12
-  %14 = mul i64 %11, 0
+  %14 = mul i64 %11, 4
   %15 = getelementptr i8, ptr %d, i64 %14
   ret ptr %15
 }