45 lines
1.2 KiB
LLVM
45 lines
1.2 KiB
LLVM
; REQUIRES: asserts
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; RUN: opt -regions -analyze -enable-new-pm=0 < %s | FileCheck %s
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; RUN: opt -passes='print<regions>' -disable-output < %s 2>&1 | FileCheck %s
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; While working on improvements to the region info analysis, this test
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; case caused an incorrect region 3 => 8 to be detected.
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define internal i8 @wibble() {
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bb:
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br i1 true, label %bb1, label %bb8
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bb1: ; preds = %bb
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switch i32 0, label %bb2 [
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i32 0, label %bb3
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i32 1, label %bb7
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]
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bb2: ; preds = %bb1
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br label %bb4
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bb3: ; preds = %bb1
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br label %bb5
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bb4: ; preds = %bb2
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br label %bb6
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bb5: ; preds = %bb3
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br label %bb6
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bb6: ; preds = %bb5, %bb4
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br label %bb7
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bb7: ; preds = %bb6, %bb1
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br label %bb8
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bb8: ; preds = %bb7, %bb
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ret i8 1
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}
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; CHECK: [0] bb => <Function Return>
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; CHECK-NEXT: [1] bb => bb8
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; CHECK-NEXT: [2] bb1 => bb7
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; CHECK-NEXT: End region tree
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