xref: /llvm-project/llvm/test/Transforms/LoopVectorize/pr48832.ll (revision 7d7577256b76e4293f455b8093504d5f7044ab4b)
1; RUN: opt -passes=loop-vectorize -force-vector-width=4 -S -o - < %s | FileCheck %s
2%arrayt = type [64 x i32]
3
4@v_146 = external global %arrayt, align 1
5
6; Since the program has well defined behavior, it should not introduce store poison
7; CHECK: vector.ph:
8; CHECK-NEXT: br label %vector.body
9; CHECK: vector.body:
10; CHECK: store <4 x i32> zeroinitializer,
11; CHECK: br i1 %{{.*}}, label %middle.block, label %vector.body
12
13define void @foo() {
14entry:
15  br label %for.cond
16
17for.cond:                                         ; preds = %cond.end, %entry
18  %storemerge = phi i16 [ 0, %entry ], [ %inc, %cond.end ]
19  %cmp = icmp slt i16 %storemerge, 15
20  br i1 %cmp, label %for.body, label %for.end
21
22for.body:                                         ; preds = %for.cond
23  br i1 true, label %cond.false, label %land.rhs
24
25land.rhs:                                         ; preds = %for.body
26  br i1 poison, label %cond.end, label %cond.false
27
28cond.false:                                       ; preds = %for.body, %land.rhs
29  br label %cond.end
30
31cond.end:                                         ; preds = %land.rhs, %cond.false
32  %cond = phi i32 [ 0, %cond.false ], [ 1, %land.rhs ]
33  %arrayidx = getelementptr inbounds %arrayt, ptr @v_146, i16 0, i16 %storemerge
34  store i32 %cond, ptr %arrayidx, align 1
35  %inc = add nsw i16 %storemerge, 1
36  br label %for.cond
37
38for.end:                                          ; preds = %for.cond
39  ret void
40}
41