1 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2 ; RUN: opt -passes=loop-idiom -S %s | FileCheck %s
4 ; Make sure we do not delete instructions not inserted during expansion, e.g.
5 ; because the expande re-used existing instructions.
7 define void @test(i64 %init, ptr %ptr) {
10 ; CHECK-NEXT: br label [[OUTER_HEADER:%.*]]
11 ; CHECK: outer.header:
12 ; CHECK-NEXT: [[J_0:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[OUTER_LATCH:%.*]] ]
13 ; CHECK-NEXT: [[I_0:%.*]] = phi i32 [ 0, [[ENTRY]] ], [ [[ADD:%.*]], [[OUTER_LATCH]] ]
14 ; CHECK-NEXT: [[ADD_PTR:%.*]] = getelementptr inbounds float, ptr [[PTR:%.*]], i32 [[I_0]]
15 ; CHECK-NEXT: br label [[INNER:%.*]]
17 ; CHECK-NEXT: [[INNER_IV:%.*]] = phi i64 [ [[INNER_IV_NEXT:%.*]], [[INNER]] ], [ [[INIT:%.*]], [[OUTER_HEADER]] ]
18 ; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds float, ptr [[PTR]], i64 [[INNER_IV]]
19 ; CHECK-NEXT: [[TMP1:%.*]] = load i32, ptr [[ARRAYIDX]], align 4
20 ; CHECK-NEXT: [[ARRAYIDX3:%.*]] = getelementptr inbounds float, ptr [[ADD_PTR]], i64 [[INNER_IV]]
21 ; CHECK-NEXT: store i32 [[TMP1]], ptr [[ARRAYIDX3]], align 4
22 ; CHECK-NEXT: [[INNER_IV_NEXT]] = add nsw i64 [[INNER_IV]], 1
23 ; CHECK-NEXT: [[EC_1:%.*]] = icmp eq i64 [[INNER_IV_NEXT]], 0
24 ; CHECK-NEXT: br i1 [[EC_1]], label [[OUTER_LATCH]], label [[INNER]]
26 ; CHECK-NEXT: [[INC]] = add nuw nsw i32 [[J_0]], 1
27 ; CHECK-NEXT: [[ADD]] = add nuw nsw i32 [[I_0]], [[INC]]
28 ; CHECK-NEXT: [[EC_2:%.*]] = icmp eq i32 [[ADD]], 4000
29 ; CHECK-NEXT: br i1 [[EC_2]], label [[EXIT:%.*]], label [[OUTER_HEADER]]
31 ; CHECK-NEXT: ret void
34 br label %outer.header
37 %j.0 = phi i32 [ 0, %entry ], [ %inc, %outer.latch ]
38 %i.0 = phi i32 [ 0, %entry ], [ %add, %outer.latch ]
39 %add.ptr = getelementptr inbounds float, ptr %ptr, i32 %i.0
43 %inner.iv = phi i64 [ %inner.iv.next, %inner ], [ %init, %outer.header ]
44 %arrayidx = getelementptr inbounds float, ptr %ptr, i64 %inner.iv
45 %0 = load i32, ptr %arrayidx, align 4
46 %arrayidx3 = getelementptr inbounds float, ptr %add.ptr, i64 %inner.iv
47 store i32 %0, ptr %arrayidx3, align 4
48 %inner.iv.next = add nsw i64 %inner.iv, 1
49 %ec.1 = icmp eq i64 %inner.iv.next, 0
50 br i1 %ec.1, label %outer.latch, label %inner
53 %inc = add nuw nsw i32 %j.0, 1
54 %add = add nuw nsw i32 %i.0, %inc
55 %ec.2 = icmp eq i32 %add, 4000
56 br i1 %ec.2, label %exit, label %outer.header