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31 lines
817 B
LLVM
31 lines
817 B
LLVM
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; RUN: opt < %s -analyze -scalar-evolution | FileCheck %s
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declare void @foo()
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define void @test1() nounwind {
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entry:
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br label %for.cond
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for.cond: ; preds = %if.end, %entry
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%i.0 = phi i32 [ 2, %entry ], [ %dec, %if.end ]
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switch i32 %i.0, label %if.end [
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i32 0, label %for.end
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i32 1, label %if.then
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]
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if.then: ; preds = %for.cond
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tail call void @foo()
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br label %if.end
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if.end: ; preds = %for.cond, %if.then
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%dec = add nsw i32 %i.0, -1
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br label %for.cond
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for.end: ; preds = %for.cond
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ret void
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; CHECK-LABEL: @test1
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; CHECK: Loop %for.cond: backedge-taken count is 2
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; CHECK: Loop %for.cond: max backedge-taken count is 2
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}
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