40 lines
683 B
LLVM
40 lines
683 B
LLVM
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; REQUIRES: asserts
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; RUN: opt -regions -analyze -enable-new-pm=0 < %s | FileCheck %s
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; RUN: opt < %s -passes='print<regions>' 2>&1 | FileCheck %s
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; While working on improvements to region info analysis, this test
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; case caused an incorrect region bb2 => bb3 to be detected.
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define internal i8 @main_read() nounwind {
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bb:
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br label %bb1
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bb1:
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br i1 true, label %bb2, label %bb7
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bb2:
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br i1 true, label %bb4, label %bb3
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bb3:
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br i1 true, label %bb4, label %bb8
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bb4:
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br label %bb5
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bb5:
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br label %bb6
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bb6:
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br label %bb1
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bb7:
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br label %bb5
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bb8:
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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] bb1 => bb8
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; CHECK-NEXT: End region tree
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