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- ; REQUIRES: asserts
- ; RUN: opt < %s -loop-unswitch -stats -disable-output 2>&1 | grep "1 loop-unswitch - Number of branches unswitched" | count 1
- ; PR 3170
- define i32 @a(i32 %x, i32 %y) nounwind {
- entry:
- %0 = icmp ult i32 0, %y ; <i1> [#uses=1]
- br i1 %0, label %bb.nph, label %bb4
- bb.nph: ; preds = %entry
- %1 = icmp eq i32 %x, 0 ; <i1> [#uses=1]
- br label %bb
- bb: ; preds = %bb.nph, %bb3
- %i.01 = phi i32 [ %3, %bb3 ], [ 0, %bb.nph ] ; <i32> [#uses=1]
- br i1 %1, label %bb2, label %bb1
- bb1: ; preds = %bb
- %2 = tail call i32 (...) @b() nounwind ; <i32> [#uses=0]
- br label %bb2
- bb2: ; preds = %bb, %bb1
- %3 = add i32 %i.01, 1 ; <i32> [#uses=2]
- br label %bb3
- bb3: ; preds = %bb2
- %i.0 = phi i32 [ %3, %bb2 ] ; <i32> [#uses=1]
- %4 = icmp ult i32 %i.0, %y ; <i1> [#uses=1]
- br i1 %4, label %bb, label %bb3.bb4_crit_edge
- bb3.bb4_crit_edge: ; preds = %bb3
- br label %bb4
- bb4: ; preds = %bb3.bb4_crit_edge, %entry
- ret i32 0
- }
- declare i32 @b(...)
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