68 lines
2.0 KiB
LLVM
68 lines
2.0 KiB
LLVM
; RUN: opt -loop-vectorize -force-vector-width=2 -S %s | FileCheck %s
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; Test cases to make sure LV & loop versioning can handle loops with
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; multiple exiting branches.
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; Multiple branches exiting the loop to a unique exit block. The loop should
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; be vectorized with versioning & noalias metadata should be added.
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define void @multiple_exits_unique_exit_block(i32* %A, i32* %B, i64 %N) {
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; CHECK-LABEL: @multiple_exits_unique_exit_block
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; CHECK: vector.memcheck:
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; CHECK-LABEL: vector.body:
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; CHECK: %wide.load = load <2 x i32>, <2 x i32>* {{.*}}, align 4, !alias.scope
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; CHECK: store <2 x i32> %wide.load, <2 x i32>* {{.*}}, align 4, !alias.scope
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; CHECK: br
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;
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entry:
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br label %loop.header
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loop.header:
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%iv = phi i64 [ 0, %entry ], [ %iv.next, %for.body ]
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%cond.0 = icmp eq i64 %iv, %N
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br i1 %cond.0, label %exit, label %for.body
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for.body:
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%A.gep = getelementptr inbounds i32, i32* %A, i64 %iv
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%lv = load i32, i32* %A.gep, align 4
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%B.gep = getelementptr inbounds i32, i32* %B, i64 %iv
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store i32 %lv, i32* %B.gep, align 4
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%iv.next = add nuw i64 %iv, 1
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%cond.1 = icmp ult i64 %iv.next, 1000
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br i1 %cond.1, label %loop.header, label %exit
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exit:
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ret void
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}
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; Multiple branches exiting the loop to different blocks. Currently this is not supported.
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define i32 @multiple_exits_multiple_exit_blocks(i32* %A, i32* %B, i64 %N) {
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; CHECK-LABEL: @multiple_exits_multiple_exit_blocks
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; CHECK-NEXT: entry:
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; CHECK: br label %loop.header
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; CHECK-NOT: <2 x i32>
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;
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entry:
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br label %loop.header
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loop.header:
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%iv = phi i64 [ 0, %entry ], [ %iv.next, %for.body ]
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%cond.0 = icmp eq i64 %iv, %N
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br i1 %cond.0, label %exit.0, label %for.body
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for.body:
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%A.gep = getelementptr inbounds i32, i32* %A, i64 %iv
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%lv = load i32, i32* %A.gep, align 4
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%B.gep = getelementptr inbounds i32, i32* %B, i64 %iv
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store i32 %lv, i32* %B.gep, align 4
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%iv.next = add nuw i64 %iv, 1
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%cond.1 = icmp ult i64 %iv.next, 1000
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br i1 %cond.1, label %loop.header, label %exit.1
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exit.0:
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ret i32 1
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exit.1:
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ret i32 2
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}
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