1 ; RUN: opt -passes=loop-distribute -enable-loop-distribute -verify-loop-info -verify-dom-info -S < %s \
4 ; Check that definitions used outside the loop are handled correctly: (1) they
5 ; are not dropped (2) when version the loop, a phi is added to merge the value
6 ; from the non-distributed loop and the distributed loop.
8 ; for (i = 0; i < n; i++) {
9 ; A[i + 1] = A[i] * B[i];
10 ; ==========================
14 target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
15 target triple = "x86_64-apple-macosx10.10.0"
17 @B = common global ptr null, align 8
18 @A = common global ptr null, align 8
19 @C = common global ptr null, align 8
20 @D = common global ptr null, align 8
21 @E = common global ptr null, align 8
22 @SUM = common global i32 0, align 8
26 %a = load ptr, ptr @A, align 8
27 %b = load ptr, ptr @B, align 8
28 %c = load ptr, ptr @C, align 8
29 %d = load ptr, ptr @D, align 8
30 %e = load ptr, ptr @E, align 8
34 ; CHECK: for.body.ldist1:
35 ; CHECK: %mulA.ldist1 = mul i32 %loadB.ldist1, %loadA.ldist1
38 ; CHECK: %sum_add = add nuw nsw i32 %sum, %loadC
39 ; CHECK: for.end.loopexit:
40 ; CHECK: %sum_add.lver.ph = phi i32 [ %sum_add.lver.orig, %for.body.lver.orig ]
41 ; CHECK: for.end.loopexit2:
42 ; CHECK: %sum_add.lver.ph3 = phi i32 [ %sum_add, %for.body ]
44 ; CHECK: %sum_add.lver = phi i32 [ %sum_add.lver.ph, %for.end.loopexit ], [ %sum_add.lver.ph3, %for.end.loopexit2 ]
46 for.body: ; preds = %for.body, %entry
47 %ind = phi i64 [ 0, %entry ], [ %add, %for.body ]
48 %sum = phi i32 [ 0, %entry ], [ %sum_add, %for.body ]
50 %arrayidxA = getelementptr inbounds i32, ptr %a, i64 %ind
51 %loadA = load i32, ptr %arrayidxA, align 4
53 %arrayidxB = getelementptr inbounds i32, ptr %b, i64 %ind
54 %loadB = load i32, ptr %arrayidxB, align 4
56 %mulA = mul i32 %loadB, %loadA
58 %add = add nuw nsw i64 %ind, 1
59 %arrayidxA_plus_4 = getelementptr inbounds i32, ptr %a, i64 %add
60 store i32 %mulA, ptr %arrayidxA_plus_4, align 4
62 %arrayidxC = getelementptr inbounds i32, ptr %c, i64 %ind
63 %loadC = load i32, ptr %arrayidxC, align 4
65 %sum_add = add nuw nsw i32 %sum, %loadC
67 %exitcond = icmp eq i64 %add, 20
68 br i1 %exitcond, label %for.end, label %for.body
70 for.end: ; preds = %for.body
71 store i32 %sum_add, ptr @SUM, align 4