1 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2 ; RUN: opt < %s -mtriple=x86_64-unknown -slp-vectorizer -S | FileCheck %s
6 ; SLP crashed when tried to delete instruction with uses.
7 ; It tried to match reduction subsequently on %i23, then %i22 etc
8 ; When it reached %i18 it was still failing to match reduction but
9 ; succeeded with its operands pair: %i17, %i11.
10 ; Then it popped instruction %i17 from stack to make next attempt on
11 ; matching reduction but the instruction was actually erased on prior
12 ; iteration (it was matched and vectorized, which added a use of a deleted
18 ; CHECK-NEXT: br i1 undef, label [[IF_END:%.*]], label [[FOR_COND_PREHEADER:%.*]]
19 ; CHECK: for.cond.preheader:
20 ; CHECK-NEXT: [[I:%.*]] = getelementptr inbounds [100 x i32], [100 x i32]* undef, i64 0, i64 2
21 ; CHECK-NEXT: [[I1:%.*]] = getelementptr inbounds [100 x i32], [100 x i32]* undef, i64 0, i64 3
22 ; CHECK-NEXT: [[I2:%.*]] = getelementptr inbounds [100 x i32], [100 x i32]* undef, i64 0, i64 4
23 ; CHECK-NEXT: [[I3:%.*]] = getelementptr inbounds [100 x i32], [100 x i32]* undef, i64 0, i64 5
24 ; CHECK-NEXT: [[I4:%.*]] = getelementptr inbounds [100 x i32], [100 x i32]* undef, i64 0, i64 6
25 ; CHECK-NEXT: [[TMP0:%.*]] = bitcast i32* [[I]] to <2 x i32>*
26 ; CHECK-NEXT: [[TMP1:%.*]] = load <2 x i32>, <2 x i32>* [[TMP0]], align 8
27 ; CHECK-NEXT: [[TMP2:%.*]] = bitcast i32* [[I1]] to <2 x i32>*
28 ; CHECK-NEXT: [[TMP3:%.*]] = load <2 x i32>, <2 x i32>* [[TMP2]], align 4
29 ; CHECK-NEXT: [[TMP4:%.*]] = bitcast i32* [[I2]] to <2 x i32>*
30 ; CHECK-NEXT: [[TMP5:%.*]] = load <2 x i32>, <2 x i32>* [[TMP4]], align 16
31 ; CHECK-NEXT: [[TMP6:%.*]] = bitcast i32* [[I3]] to <2 x i32>*
32 ; CHECK-NEXT: [[TMP7:%.*]] = load <2 x i32>, <2 x i32>* [[TMP6]], align 4
33 ; CHECK-NEXT: [[TMP8:%.*]] = add <2 x i32> undef, [[TMP7]]
34 ; CHECK-NEXT: [[TMP9:%.*]] = add <2 x i32> [[TMP8]], [[TMP5]]
35 ; CHECK-NEXT: [[TMP10:%.*]] = add <2 x i32> [[TMP9]], [[TMP3]]
36 ; CHECK-NEXT: [[TMP11:%.*]] = add <2 x i32> [[TMP10]], [[TMP1]]
37 ; CHECK-NEXT: [[TMP12:%.*]] = add <2 x i32> [[TMP11]], undef
38 ; CHECK-NEXT: [[TMP13:%.*]] = extractelement <2 x i32> [[TMP12]], i32 0
39 ; CHECK-NEXT: [[TMP14:%.*]] = extractelement <2 x i32> [[TMP11]], i32 0
40 ; CHECK-NEXT: [[I11:%.*]] = add i32 [[TMP14]], [[TMP13]]
41 ; CHECK-NEXT: [[TMP15:%.*]] = extractelement <2 x i32> [[TMP12]], i32 1
42 ; CHECK-NEXT: [[I18:%.*]] = add i32 [[TMP15]], [[I11]]
43 ; CHECK-NEXT: [[I19:%.*]] = add i32 [[TMP15]], [[I18]]
44 ; CHECK-NEXT: [[I20:%.*]] = add i32 undef, [[I19]]
45 ; CHECK-NEXT: [[I21:%.*]] = add i32 undef, [[I20]]
46 ; CHECK-NEXT: [[I22:%.*]] = add i32 undef, [[I21]]
47 ; CHECK-NEXT: [[I23:%.*]] = add i32 undef, [[I22]]
48 ; CHECK-NEXT: br label [[IF_END]]
50 ; CHECK-NEXT: [[R:%.*]] = phi i32 [ [[I23]], [[FOR_COND_PREHEADER]] ], [ undef, [[ENTRY:%.*]] ]
51 ; CHECK-NEXT: ret void
54 br i1 undef, label %if.end, label %for.cond.preheader
56 for.cond.preheader: ; preds = %entry
57 %i = getelementptr inbounds [100 x i32], [100 x i32]* undef, i64 0, i64 2
58 %i1 = getelementptr inbounds [100 x i32], [100 x i32]* undef, i64 0, i64 3
59 %i2 = getelementptr inbounds [100 x i32], [100 x i32]* undef, i64 0, i64 4
60 %i3 = getelementptr inbounds [100 x i32], [100 x i32]* undef, i64 0, i64 5
61 %i4 = getelementptr inbounds [100 x i32], [100 x i32]* undef, i64 0, i64 6
62 %ld0 = load i32, i32* %i, align 8
63 %ld1 = load i32, i32* %i1, align 4
64 %ld2 = load i32, i32* %i2, align 16
65 %ld3 = load i32, i32* %i3, align 4
66 %i5 = add i32 undef, undef
67 %i6 = add i32 %i5, %ld3
68 %i7 = add i32 %i6, %ld2
69 %i8 = add i32 %i7, %ld1
70 %i9 = add i32 %i8, %ld0
71 %i10 = add i32 %i9, undef
72 %i11 = add i32 %i9, %i10
73 %ld4 = load i32, i32* %i1, align 4
74 %ld5 = load i32, i32* %i2, align 16
75 %ld6 = load i32, i32* %i3, align 4
76 %ld7 = load i32, i32* %i4, align 8
77 %i12 = add i32 undef, undef
78 %i13 = add i32 %i12, %ld7
79 %i14 = add i32 %i13, %ld6
80 %i15 = add i32 %i14, %ld5
81 %i16 = add i32 %i15, %ld4
82 %i17 = add i32 %i16, undef
83 %i18 = add i32 %i17, %i11
84 %i19 = add i32 %i17, %i18
85 %i20 = add i32 undef, %i19
86 %i21 = add i32 undef, %i20
87 %i22 = add i32 undef, %i21
88 %i23 = add i32 undef, %i22
91 if.end: ; preds = %for.cond.preheader, %entry
92 %r = phi i32 [ %i23, %for.cond.preheader ], [ undef, %entry ]