1 ; RUN: opt %loadPolly -basic-aa -polly-invariant-load-hoisting=true -polly-print-ast -disable-output < %s | FileCheck %s --allow-empty
12 ; memset(A, 0, sizeof(int) * N);
18 ; for (i = 2; i < N; i++) {
19 ; A[i] = A[i-1] + A[i-2];
23 ; if (RED[0] != 382399368)
27 target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
29 define i32 @main() nounwind {
31 %A = alloca [1021 x i32], align 4 ; <ptr> [#uses=6]
32 %RED = alloca [1 x i32], align 4 ; <ptr> [#uses=3]
33 %arraydecay = getelementptr inbounds [1021 x i32], ptr %A, i32 0, i32 0 ; <ptr> [#uses=1]
34 call void @llvm.memset.p0.i64(ptr %arraydecay, i8 0, i64 4084, i32 1, i1 false)
35 %arraydecay1 = getelementptr inbounds [1021 x i32], ptr %A, i32 0, i32 0 ; <ptr> [#uses=1]
36 %arrayidx = getelementptr inbounds i32, ptr %arraydecay1, i64 0 ; <ptr> [#uses=1]
37 store i32 1, ptr %arrayidx
38 %arraydecay2 = getelementptr inbounds [1021 x i32], ptr %A, i32 0, i32 0 ; <ptr> [#uses=1]
39 %arrayidx3 = getelementptr inbounds i32, ptr %arraydecay2, i64 1 ; <ptr> [#uses=1]
40 store i32 1, ptr %arrayidx3
41 %arraydecay4 = getelementptr inbounds [1 x i32], ptr %RED, i32 0, i32 0 ; <ptr> [#uses=1]
42 %arrayidx5 = getelementptr inbounds i32, ptr %arraydecay4, i64 0 ; <ptr> [#uses=1]
43 store i32 0, ptr %arrayidx5
46 for.cond: ; preds = %for.inc, %entry
47 %indvar = phi i64 [ %indvar.next, %for.inc ], [ 0, %entry ] ; <i64> [#uses=5]
48 %arrayidx15 = getelementptr [1021 x i32], ptr %A, i64 0, i64 %indvar ; <ptr> [#uses=2]
49 %tmp = add i64 %indvar, 2 ; <i64> [#uses=1]
50 %arrayidx20 = getelementptr [1021 x i32], ptr %A, i64 0, i64 %tmp ; <ptr> [#uses=1]
51 %tmp1 = add i64 %indvar, 1 ; <i64> [#uses=1]
52 %arrayidx9 = getelementptr [1021 x i32], ptr %A, i64 0, i64 %tmp1 ; <ptr> [#uses=1]
53 %exitcond = icmp ne i64 %indvar, 1019 ; <i1> [#uses=1]
54 br i1 %exitcond, label %for.body, label %for.end
56 for.body: ; preds = %for.cond
57 %tmp10 = load i32, ptr %arrayidx9 ; <i32> [#uses=1]
58 %tmp16 = load i32, ptr %arrayidx15 ; <i32> [#uses=1]
59 %add = add nsw i32 %tmp10, %tmp16 ; <i32> [#uses=1]
60 store i32 %add, ptr %arrayidx20
61 %tmp26 = load i32, ptr %arrayidx15 ; <i32> [#uses=1]
62 %arraydecay27 = getelementptr inbounds [1 x i32], ptr %RED, i32 0, i32 0 ; <ptr> [#uses=1]
63 %arrayidx28 = getelementptr inbounds i32, ptr %arraydecay27, i64 0 ; <ptr> [#uses=2]
64 %tmp29 = load i32, ptr %arrayidx28 ; <i32> [#uses=1]
65 %add30 = add nsw i32 %tmp29, %tmp26 ; <i32> [#uses=1]
66 store i32 %add30, ptr %arrayidx28
69 for.inc: ; preds = %for.body
70 %indvar.next = add i64 %indvar, 1 ; <i64> [#uses=1]
73 for.end: ; preds = %for.cond
74 %arraydecay32 = getelementptr inbounds [1 x i32], ptr %RED, i32 0, i32 0 ; <ptr> [#uses=1]
75 %arrayidx33 = getelementptr inbounds i32, ptr %arraydecay32, i64 0 ; <ptr> [#uses=1]
76 %tmp34 = load i32, ptr %arrayidx33 ; <i32> [#uses=1]
77 %cmp35 = icmp ne i32 %tmp34, 382399368 ; <i1> [#uses=1]
78 br i1 %cmp35, label %if.then, label %if.end
80 if.then: ; preds = %for.end
83 if.end: ; preds = %if.then, %for.end
84 %retval.0 = phi i32 [ 1, %if.then ], [ 0, %for.end ] ; <i32> [#uses=1]
88 declare void @llvm.memset.p0.i64(ptr nocapture, i8, i64, i32, i1) nounwind
90 ; This is a negative test. We can prove that RED[0] in the conditional after
91 ; the loop is dereferencable and consequently expand the SCoP from the
92 ; loop to include the conditional. However, during SCoP generation we realize
93 ; that, while RED[0] is invariant, it is written to as part of the same scop
94 ; and can consequently not be hoisted. Hence, we invalidate the scop.
96 ; CHECK-NOT: for (int c0 = 0; c0 <= 1018; c0 += 1)