45 lines
849 B
LLVM
45 lines
849 B
LLVM
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; RUN: opt -S < %s -jump-threading | FileCheck %s
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; PR40992: Do not incorrectly fold %bb5 into an unconditional br to %bb7.
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; Also verify we correctly thread %bb1 -> %bb7 when %c is false.
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define i32 @jtbr(i1 %v1, i1 %v2, i1 %v3) {
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; CHECK: bb0:
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bb0:
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br label %bb1
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; CHECK: bb1:
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; CHECK-NEXT: and
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; CHECK-NEXT: br i1 %c, label %bb2, label %bb7
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bb1:
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%c = and i1 %v1, %v2
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br i1 %c, label %bb2, label %bb5
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; CHECK: bb2:
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; CHECK-NEXT: select
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; CHECK-NEXT: indirectbr i8* %ba, [label %bb3, label %bb5]
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bb2:
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%ba = select i1 %v3, i8* blockaddress(@jtbr, %bb3), i8* blockaddress(@jtbr, %bb4)
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indirectbr i8* %ba, [label %bb3, label %bb4]
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; CHECK: bb3:
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bb3:
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br label %bb1
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; CHECK-NOT: bb4:
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bb4:
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br label %bb5
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; CHECK: bb5:
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bb5:
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br i1 %c, label %bb6, label %bb7
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; CHECK: bb6:
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bb6:
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ret i32 0
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; CHECK: bb7:
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bb7:
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ret i32 1
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}
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