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; RUN: opt -verify-loop-info -irce-print-changed-loops -irce -S < %s 2>&1 | FileCheck %s
; CHECK-LABEL: irce: in function test_01: constrained Loop at depth 2 containing:
define void @test_01(i64 %len) {
; CHECK-LABEL: @test_01(
entry:
br label %loop
check:
%entry_check = icmp eq i32 %idx.next, 0
br i1 %entry_check, label %exit, label %loop
loop:
%idx = phi i32 [ 1, %entry ], [ %idx.next, %check ]
%idx_ext = sext i32 %idx to i64
br label %inner_loop
inner_loop:
%iv = phi i64 [ 0, %loop ], [ %iv.next, %inner_backedge ]
%iv.next = add nuw nsw i64 %iv, 1
%inner_check = icmp slt i64 %iv.next, %idx_ext
br i1 %inner_check, label %inner, label %outer_check
inner:
%iv_next_check = icmp slt i64 %iv.next, 100
br i1 %iv_next_check, label %inner_backedge, label %exit
inner_backedge:
%cond = icmp eq i64 %iv.next, 100
br i1 %cond, label %exit, label %inner_loop
outer_check:
%idx.next = add i32 %idx, 1
%loopdone = icmp slt i32 %idx.next, 2
br i1 %loopdone, label %check, label %exit
exit:
ret void
}
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