1 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2 ; RUN: opt -S -passes=loop-vectorize < %s | FileCheck %s
4 ; This is a regression test. Without the fix it crashes on SSAUpdater due to
5 ; LoopVectroizer created a phi node placeholder without incoming values but
6 ; SSAUpdater expects that phi node is completely filled.
8 target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128-ni:1-p2:32:8:8:32-ni:2"
9 define void @test(i32 %arg, i32 %L1.limit, i32 %L2.switch, i1 %c) {
11 ; CHECK-NEXT: L1.preheader:
12 ; CHECK-NEXT: [[TMP0:%.*]] = sub i32 -1, [[ARG:%.*]]
13 ; CHECK-NEXT: br label [[L1_HEADER:%.*]]
15 ; CHECK-NEXT: [[INDUCTION_IV:%.*]] = phi i32 [ [[INDUCTION_IV_NEXT:%.*]], [[L1_BACKEDGE:%.*]] ], [ [[TMP0]], [[L1_PREHEADER:%.*]] ]
16 ; CHECK-NEXT: [[INDVAR:%.*]] = phi i32 [ [[INDVAR_NEXT:%.*]], [[L1_BACKEDGE]] ], [ 0, [[L1_PREHEADER]] ]
17 ; CHECK-NEXT: [[L1_SUM:%.*]] = phi i32 [ [[ARG]], [[L1_PREHEADER]] ], [ [[L1_SUM_NEXT:%.*]], [[L1_BACKEDGE]] ]
18 ; CHECK-NEXT: [[L1_IV:%.*]] = phi i32 [ 1, [[L1_PREHEADER]] ], [ [[L1_IV_NEXT:%.*]], [[L1_BACKEDGE]] ]
19 ; CHECK-NEXT: [[TMP1:%.*]] = mul nsw i32 [[INDVAR]], -1
20 ; CHECK-NEXT: [[TMP2:%.*]] = add i32 [[TMP1]], -2
21 ; CHECK-NEXT: br i1 [[C:%.*]], label [[L1_BACKEDGE]], label [[L1_EARLY_EXIT:%.*]]
23 ; CHECK-NEXT: [[L1_SUM_NEXT]] = add i32 [[L1_IV]], [[L1_SUM]]
24 ; CHECK-NEXT: [[L1_IV_NEXT]] = add nuw nsw i32 [[L1_IV]], 1
25 ; CHECK-NEXT: [[L1_EXIT_COND:%.*]] = icmp ult i32 [[L1_IV_NEXT]], [[L1_LIMIT:%.*]]
26 ; CHECK-NEXT: [[INDVAR_NEXT]] = add i32 [[INDVAR]], 1
27 ; CHECK-NEXT: [[INDUCTION_IV_NEXT]] = add i32 [[INDUCTION_IV]], [[TMP2]]
28 ; CHECK-NEXT: br i1 [[L1_EXIT_COND]], label [[L1_HEADER]], label [[L1_EXIT:%.*]]
29 ; CHECK: L1.early.exit:
30 ; CHECK-NEXT: ret void
32 ; CHECK-NEXT: [[INDUCTION_IV_LCSSA3:%.*]] = phi i32 [ [[INDUCTION_IV]], [[L1_BACKEDGE]] ]
33 ; CHECK-NEXT: [[INDUCTION_IV_LCSSA1:%.*]] = phi i32 [ [[INDUCTION_IV]], [[L1_BACKEDGE]] ]
34 ; CHECK-NEXT: [[L1_EXIT_VAL:%.*]] = phi i32 [ [[L1_SUM_NEXT]], [[L1_BACKEDGE]] ]
35 ; CHECK-NEXT: br label [[L2_HEADER:%.*]]
36 ; CHECK: L2.header.loopexit:
37 ; CHECK-NEXT: br label [[L2_HEADER_BACKEDGE:%.*]]
39 ; CHECK-NEXT: switch i32 [[L2_SWITCH:%.*]], label [[L2_HEADER_BACKEDGE]] [
40 ; CHECK-NEXT: i32 8, label [[L2_EXIT:%.*]]
41 ; CHECK-NEXT: i32 20, label [[L2_INNER_HEADER_PREHEADER:%.*]]
43 ; CHECK: L2.header.backedge:
44 ; CHECK-NEXT: br label [[L2_HEADER]]
45 ; CHECK: L2.Inner.header.preheader:
46 ; CHECK-NEXT: br i1 false, label [[SCALAR_PH:%.*]], label [[VECTOR_PH:%.*]]
48 ; CHECK-NEXT: [[TMP3:%.*]] = mul i32 12, [[INDUCTION_IV_LCSSA1]]
49 ; CHECK-NEXT: [[IND_END:%.*]] = add i32 1, [[TMP3]]
50 ; CHECK-NEXT: br label [[VECTOR_BODY:%.*]]
52 ; CHECK-NEXT: [[INDEX:%.*]] = phi i64 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
53 ; CHECK-NEXT: [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 4
54 ; CHECK-NEXT: [[TMP4:%.*]] = icmp eq i64 [[INDEX_NEXT]], 12
55 ; CHECK-NEXT: br i1 [[TMP4]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP0:![0-9]+]]
56 ; CHECK: middle.block:
57 ; CHECK-NEXT: [[CMP_N:%.*]] = icmp eq i64 12, 12
58 ; CHECK-NEXT: br i1 [[CMP_N]], label [[L2_HEADER_LOOPEXIT:%.*]], label [[SCALAR_PH]]
60 ; CHECK-NEXT: [[BC_RESUME_VAL:%.*]] = phi i32 [ [[IND_END]], [[MIDDLE_BLOCK]] ], [ 1, [[L2_INNER_HEADER_PREHEADER]] ]
61 ; CHECK-NEXT: [[BC_RESUME_VAL2:%.*]] = phi i64 [ 13, [[MIDDLE_BLOCK]] ], [ 1, [[L2_INNER_HEADER_PREHEADER]] ]
62 ; CHECK-NEXT: br label [[L2_INNER_HEADER:%.*]]
63 ; CHECK: L2.Inner.header:
64 ; CHECK-NEXT: [[L2_ACCUM:%.*]] = phi i32 [ [[L2_ACCUM_NEXT:%.*]], [[L2_INNER_HEADER]] ], [ [[BC_RESUME_VAL]], [[SCALAR_PH]] ]
65 ; CHECK-NEXT: [[L2_IV:%.*]] = phi i64 [ [[L2_IV_NEXT:%.*]], [[L2_INNER_HEADER]] ], [ [[BC_RESUME_VAL2]], [[SCALAR_PH]] ]
66 ; CHECK-NEXT: [[L2_ACCUM_NEXT]] = sub i32 [[L2_ACCUM]], [[L1_EXIT_VAL]]
67 ; CHECK-NEXT: [[L2_DUMMY_BUT_NEED_IT:%.*]] = sext i32 [[L2_ACCUM_NEXT]] to i64
68 ; CHECK-NEXT: [[L2_IV_NEXT]] = add nuw nsw i64 [[L2_IV]], 1
69 ; CHECK-NEXT: [[L2_EXIT_COND:%.*]] = icmp ugt i64 [[L2_IV]], 11
70 ; CHECK-NEXT: br i1 [[L2_EXIT_COND]], label [[L2_HEADER_LOOPEXIT]], label [[L2_INNER_HEADER]], !llvm.loop [[LOOP2:![0-9]+]]
72 ; CHECK-NEXT: ret void
77 L1.header: ; preds = %L1.preheader, %L1.backedge
78 %L1.sum = phi i32 [ %arg, %L1.preheader ], [ %L1.sum.next, %L1.backedge ]
79 %L1.iv = phi i32 [ 1, %L1.preheader ], [ %L1.iv.next, %L1.backedge ]
80 br i1 %c, label %L1.backedge, label %L1.early.exit
82 L1.backedge: ; preds = %L1.header
83 %L1.sum.next = add i32 %L1.iv, %L1.sum
84 %L1.iv.next = add nuw nsw i32 %L1.iv, 1
85 %L1.exit.cond = icmp ult i32 %L1.iv.next, %L1.limit
86 br i1 %L1.exit.cond, label %L1.header, label %L1.exit
88 L1.early.exit: ; preds = %L1.header
91 L1.exit: ; preds = %L1.backedge
92 %L1.exit.val = phi i32 [ %L1.sum.next, %L1.backedge ]
95 L2.header: ; preds = %L2.Inner.header, %L1.exit, %L2.header
96 switch i32 %L2.switch, label %L2.header [
98 i32 20, label %L2.Inner.header
101 L2.Inner.header: ; preds = %L2.Inner.header, %L2.header
102 %L2.accum = phi i32 [ %L2.accum.next, %L2.Inner.header ], [ 1, %L2.header ]
103 %L2.iv = phi i64 [ %L2.iv.next, %L2.Inner.header ], [ 1, %L2.header ]
104 %L2.accum.next = sub i32 %L2.accum, %L1.exit.val
105 %L2.dummy.but.need.it = sext i32 %L2.accum.next to i64
106 %L2.iv.next = add nuw nsw i64 %L2.iv, 1
107 %L2.exit_cond = icmp ugt i64 %L2.iv, 11
108 br i1 %L2.exit_cond, label %L2.header, label %L2.Inner.header
110 L2.exit: ; preds = %L2.header