1 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2 ; RUN: opt -mtriple=thumbv8.1m.main-arm-none-eabi -mattr=+mve.fp < %s -codegenprepare -S | FileCheck -check-prefix=CHECK %s
4 ; Sink the shufflevector/insertelement pair, followed by the trunc. The sunk instruction end up dead.
5 define signext i8 @dead(i16* noalias nocapture readonly %s1, i16 zeroext %x, i8* noalias nocapture %d, i32 %n) {
8 ; CHECK-NEXT: [[N_VEC:%.*]] = and i32 [[N:%.*]], -8
9 ; CHECK-NEXT: br label [[VECTOR_BODY:%.*]]
11 ; CHECK-NEXT: [[INDEX:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
12 ; CHECK-NEXT: [[TMP0:%.*]] = trunc i16 [[X:%.*]] to i8
13 ; CHECK-NEXT: [[L6:%.*]] = getelementptr inbounds i16, i16* [[S1:%.*]], i32 [[INDEX]]
14 ; CHECK-NEXT: [[L7:%.*]] = bitcast i16* [[L6]] to <8 x i16>*
15 ; CHECK-NEXT: [[WIDE_LOAD:%.*]] = load <8 x i16>, <8 x i16>* [[L7]], align 2
16 ; CHECK-NEXT: [[L8:%.*]] = trunc <8 x i16> [[WIDE_LOAD]] to <8 x i8>
17 ; CHECK-NEXT: [[TMP1:%.*]] = insertelement <8 x i8> undef, i8 [[TMP0]], i32 0
18 ; CHECK-NEXT: [[TMP2:%.*]] = shufflevector <8 x i8> [[TMP1]], <8 x i8> undef, <8 x i32> zeroinitializer
19 ; CHECK-NEXT: [[L9:%.*]] = mul <8 x i8> [[TMP2]], [[L8]]
20 ; CHECK-NEXT: [[L13:%.*]] = getelementptr inbounds i8, i8* [[D:%.*]], i32 [[INDEX]]
21 ; CHECK-NEXT: [[L14:%.*]] = bitcast i8* [[L13]] to <8 x i8>*
22 ; CHECK-NEXT: store <8 x i8> [[L9]], <8 x i8>* [[L14]], align 1
23 ; CHECK-NEXT: [[INDEX_NEXT]] = add i32 [[INDEX]], 8
24 ; CHECK-NEXT: [[L15:%.*]] = icmp eq i32 [[INDEX_NEXT]], [[N_VEC]]
25 ; CHECK-NEXT: br i1 [[L15]], label [[EXIT:%.*]], label [[VECTOR_BODY]]
27 ; CHECK-NEXT: ret i8 0
30 %n.vec = and i32 %n, -8
31 %l0 = trunc i16 %x to i8
32 %l1 = insertelement <8 x i8> undef, i8 %l0, i32 0
33 %broadcast.splat26 = shufflevector <8 x i8> %l1, <8 x i8> undef, <8 x i32> zeroinitializer
36 vector.body: ; preds = %vector.body, %entry
37 %index = phi i32 [ 0, %entry ], [ %index.next, %vector.body ]
38 %l6 = getelementptr inbounds i16, i16* %s1, i32 %index
39 %l7 = bitcast i16* %l6 to <8 x i16>*
40 %wide.load = load <8 x i16>, <8 x i16>* %l7, align 2
41 %l8 = trunc <8 x i16> %wide.load to <8 x i8>
42 %l9 = mul <8 x i8> %broadcast.splat26, %l8
43 %l13 = getelementptr inbounds i8, i8* %d, i32 %index
44 %l14 = bitcast i8* %l13 to <8 x i8>*
45 store <8 x i8> %l9, <8 x i8>* %l14, align 1
46 %index.next = add i32 %index, 8
47 %l15 = icmp eq i32 %index.next, %n.vec
48 br i1 %l15, label %exit, label %vector.body
50 exit: ; preds = %vector.body
54 ; Same as above, but the shuffle has an extra use meaning it shouldnt be deleted
55 define signext i8 @alive(i16* noalias nocapture readonly %s1, i16 zeroext %x, i8* noalias nocapture %d, i32 %n) {
56 ; CHECK-LABEL: @alive(
58 ; CHECK-NEXT: [[N_VEC:%.*]] = and i32 [[N:%.*]], -8
59 ; CHECK-NEXT: [[L0:%.*]] = trunc i16 [[X:%.*]] to i8
60 ; CHECK-NEXT: [[L1:%.*]] = insertelement <8 x i8> undef, i8 [[L0]], i32 0
61 ; CHECK-NEXT: [[BROADCAST_SPLAT26:%.*]] = shufflevector <8 x i8> [[L1]], <8 x i8> undef, <8 x i32> zeroinitializer
62 ; CHECK-NEXT: [[L2:%.*]] = sub <8 x i8> zeroinitializer, [[BROADCAST_SPLAT26]]
63 ; CHECK-NEXT: br label [[VECTOR_BODY:%.*]]
65 ; CHECK-NEXT: [[INDEX:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
66 ; CHECK-NEXT: [[TMP0:%.*]] = trunc i16 [[X]] to i8
67 ; CHECK-NEXT: [[L6:%.*]] = getelementptr inbounds i16, i16* [[S1:%.*]], i32 [[INDEX]]
68 ; CHECK-NEXT: [[L7:%.*]] = bitcast i16* [[L6]] to <8 x i16>*
69 ; CHECK-NEXT: [[WIDE_LOAD:%.*]] = load <8 x i16>, <8 x i16>* [[L7]], align 2
70 ; CHECK-NEXT: [[L8:%.*]] = trunc <8 x i16> [[WIDE_LOAD]] to <8 x i8>
71 ; CHECK-NEXT: [[TMP1:%.*]] = insertelement <8 x i8> undef, i8 [[TMP0]], i32 0
72 ; CHECK-NEXT: [[TMP2:%.*]] = shufflevector <8 x i8> [[TMP1]], <8 x i8> undef, <8 x i32> zeroinitializer
73 ; CHECK-NEXT: [[L9:%.*]] = mul <8 x i8> [[TMP2]], [[L8]]
74 ; CHECK-NEXT: [[L13:%.*]] = getelementptr inbounds i8, i8* [[D:%.*]], i32 [[INDEX]]
75 ; CHECK-NEXT: [[L14:%.*]] = bitcast i8* [[L13]] to <8 x i8>*
76 ; CHECK-NEXT: store <8 x i8> [[L9]], <8 x i8>* [[L14]], align 1
77 ; CHECK-NEXT: [[INDEX_NEXT]] = add i32 [[INDEX]], 8
78 ; CHECK-NEXT: [[L15:%.*]] = icmp eq i32 [[INDEX_NEXT]], [[N_VEC]]
79 ; CHECK-NEXT: br i1 [[L15]], label [[EXIT:%.*]], label [[VECTOR_BODY]]
81 ; CHECK-NEXT: ret i8 0
84 %n.vec = and i32 %n, -8
85 %l0 = trunc i16 %x to i8
86 %l1 = insertelement <8 x i8> undef, i8 %l0, i32 0
87 %broadcast.splat26 = shufflevector <8 x i8> %l1, <8 x i8> undef, <8 x i32> zeroinitializer
88 %l2 = sub <8 x i8> zeroinitializer, %broadcast.splat26
91 vector.body: ; preds = %vector.body, %entry
92 %index = phi i32 [ 0, %entry ], [ %index.next, %vector.body ]
93 %l6 = getelementptr inbounds i16, i16* %s1, i32 %index
94 %l7 = bitcast i16* %l6 to <8 x i16>*
95 %wide.load = load <8 x i16>, <8 x i16>* %l7, align 2
96 %l8 = trunc <8 x i16> %wide.load to <8 x i8>
97 %l9 = mul <8 x i8> %broadcast.splat26, %l8
98 %l13 = getelementptr inbounds i8, i8* %d, i32 %index
99 %l14 = bitcast i8* %l13 to <8 x i8>*
100 store <8 x i8> %l9, <8 x i8>* %l14, align 1
101 %index.next = add i32 %index, 8
102 %l15 = icmp eq i32 %index.next, %n.vec
103 br i1 %l15, label %exit, label %vector.body
105 exit: ; preds = %vector.body