1; RUN: opt < %s -loop-unswitch -loop-unswitch-threshold=0 -S 2>&1 | FileCheck %s
2
3; This is to test trivial loop unswitch only happens when trivial condition
4; itself is an LIV loop condition (not partial LIV which could occur in and/or).
5
6define i32 @test(i1 %cond1, i32 %var1) {
7entry:
8  br label %loop_begin
9
10loop_begin:
11  %var3 = phi i32 [%var1, %entry], [%var2, %do_something]
12  %cond2 = icmp eq i32 %var3, 10
13  %cond.and = and i1 %cond1, %cond2
14
15; %cond.and only has %cond1 as LIV so no unswitch should happen.
16; CHECK: br i1 %cond.and, label %do_something, label %loop_exit
17  br i1 %cond.and, label %do_something, label %loop_exit
18
19do_something:
20  %var2 = add i32 %var3, 1
21  call void @some_func() noreturn nounwind
22  br label %loop_begin
23
24loop_exit:
25  ret i32 0
26}
27
28declare void @some_func() noreturn