1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2; RUN: opt -passes=loop-vectorize -force-vector-width=2 -force-vector-interleave=1 -S %s | FileCheck %s
3
4
5; Test case where %gep has multiple uses of %iv.
6define void @multiple_iv_uses_in_same_instruction([100 x [100 x i32]]* %ptr) {
7; CHECK-LABEL: @multiple_iv_uses_in_same_instruction(
8; CHECK-NEXT:  entry:
9; CHECK-NEXT:    br i1 false, label [[SCALAR_PH:%.*]], label [[VECTOR_PH:%.*]]
10; CHECK:       vector.ph:
11; CHECK-NEXT:    br label [[VECTOR_BODY:%.*]]
12; CHECK:       vector.body:
13; CHECK-NEXT:    [[INDEX:%.*]] = phi i64 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
14; CHECK-NEXT:    [[TMP0:%.*]] = trunc i64 [[INDEX]] to i32
15; CHECK-NEXT:    [[TMP1:%.*]] = add i32 [[TMP0]], 0
16; CHECK-NEXT:    [[TMP2:%.*]] = add i32 [[TMP0]], 1
17; CHECK-NEXT:    [[TMP3:%.*]] = add i64 [[INDEX]], 0
18; CHECK-NEXT:    [[TMP4:%.*]] = add i64 [[INDEX]], 1
19; CHECK-NEXT:    [[TMP5:%.*]] = getelementptr inbounds [100 x [100 x i32]], [100 x [100 x i32]]* [[PTR:%.*]], i64 0, i64 [[TMP3]], i64 [[TMP3]]
20; CHECK-NEXT:    [[TMP6:%.*]] = getelementptr inbounds [100 x [100 x i32]], [100 x [100 x i32]]* [[PTR]], i64 0, i64 [[TMP4]], i64 [[TMP4]]
21; CHECK-NEXT:    store i32 [[TMP1]], i32* [[TMP5]], align 4
22; CHECK-NEXT:    store i32 [[TMP2]], i32* [[TMP6]], align 4
23; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 2
24; CHECK-NEXT:    [[TMP7:%.*]] = icmp eq i64 [[INDEX_NEXT]], 100
25; CHECK-NEXT:    br i1 [[TMP7]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP0:![0-9]+]]
26; CHECK:       middle.block:
27; CHECK-NEXT:    [[CMP_N:%.*]] = icmp eq i64 100, 100
28; CHECK-NEXT:    br i1 [[CMP_N]], label [[EXIT:%.*]], label [[SCALAR_PH]]
29; CHECK:       scalar.ph:
30; CHECK-NEXT:    [[BC_RESUME_VAL:%.*]] = phi i64 [ 100, [[MIDDLE_BLOCK]] ], [ 0, [[ENTRY:%.*]] ]
31; CHECK-NEXT:    br label [[LOOP:%.*]]
32; CHECK:       loop:
33; CHECK-NEXT:    [[IV:%.*]] = phi i64 [ [[BC_RESUME_VAL]], [[SCALAR_PH]] ], [ [[IV_NEXT:%.*]], [[LOOP]] ]
34; CHECK-NEXT:    [[GEP:%.*]] = getelementptr inbounds [100 x [100 x i32]], [100 x [100 x i32]]* [[PTR]], i64 0, i64 [[IV]], i64 [[IV]]
35; CHECK-NEXT:    [[T:%.*]] = trunc i64 [[IV]] to i32
36; CHECK-NEXT:    store i32 [[T]], i32* [[GEP]], align 4
37; CHECK-NEXT:    [[IV_NEXT]] = add nuw nsw i64 [[IV]], 1
38; CHECK-NEXT:    [[EXITCOND:%.*]] = icmp eq i64 [[IV_NEXT]], 100
39; CHECK-NEXT:    br i1 [[EXITCOND]], label [[EXIT]], label [[LOOP]], !llvm.loop [[LOOP2:![0-9]+]]
40; CHECK:       exit:
41; CHECK-NEXT:    ret void
42;
43entry:
44  br label %loop
45
46loop:
47  %iv = phi i64 [ 0, %entry ], [ %iv.next, %loop ]
48  %gep = getelementptr inbounds [100 x [100 x i32]], [100 x [100 x i32]]* %ptr, i64 0, i64 %iv, i64 %iv
49  %t = trunc i64 %iv to i32
50  store i32 %t, i32* %gep, align 4
51  %iv.next = add nuw nsw i64 %iv, 1
52  %exitcond = icmp eq i64 %iv.next, 100
53  br i1 %exitcond, label %exit, label %loop
54
55exit:
56  ret void
57}
58