-; RUN: opt -S -indvars < %s | FileCheck %s
-
-declare void @side_effect(i1)
-
-define void @latch_dominating_0(i8 %start) {
-; CHECK-LABEL: latch_dominating_0
- entry:
- %e = icmp slt i8 %start, 42
- br i1 %e, label %loop, label %exit
-
- loop:
-; CHECK-LABEL: loop
- %idx = phi i8 [ %start, %entry ], [ %idx.inc, %be ]
- %idx.inc = add i8 %idx, 1
- %folds.to.true = icmp slt i8 %idx, 42
-; CHECK: call void @side_effect(i1 true)
- call void @side_effect(i1 %folds.to.true)
- %c0 = icmp slt i8 %idx.inc, 42
- br i1 %c0, label %be, label %exit
-
- be:
-; CHECK: call void @side_effect(i1 true)
- call void @side_effect(i1 %folds.to.true)
- %c1 = icmp slt i8 %idx.inc, 100
- br i1 %c1, label %loop, label %exit
-
- exit:
- ret void
-}
-
-define void @latch_dominating_1(i8 %start) {
-; CHECK-LABEL: latch_dominating_1
- entry:
- %e = icmp slt i8 %start, 42
- br i1 %e, label %loop, label %exit
-
- loop:
-; CHECK-LABEL: loop
- %idx = phi i8 [ %start, %entry ], [ %idx.inc, %be ]
- %idx.inc = add i8 %idx, 1
- %does.not.fold.to.true = icmp slt i8 %idx, 42
-; CHECK: call void @side_effect(i1 %does.not.fold.to.true)
- call void @side_effect(i1 %does.not.fold.to.true)
- %c0 = icmp slt i8 %idx.inc, 42
- br i1 %c0, label %be, label %be
-
- be:
-; CHECK: call void @side_effect(i1 %does.not.fold.to.true)
- call void @side_effect(i1 %does.not.fold.to.true)
- %c1 = icmp slt i8 %idx.inc, 100
- br i1 %c1, label %loop, label %exit
-
- exit:
- ret void
-}