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1; RUN: opt < %s -passes="loop-mssa(simple-loop-unswitch)" -verify-memoryssa -S 2>&1 | FileCheck %s2 3; This is to test trivial loop unswitch only happens when trivial condition4; itself is an LIV loop condition (not partial LIV which could occur in and/or).5 6define i32 @test(i1 %cond1, i32 %var1) {7; CHECK-LABEL: define i32 @test(8entry:9 br label %loop_begin10; CHECK-NEXT: entry:11; CHECK-NEXT: [[FROZEN:%.+]] = freeze i1 %cond112; CHECK-NEXT: br i1 [[FROZEN]], label %entry.split, label %loop_exit.split13;14; CHECK: entry.split:15; CHECK-NEXT: br label %loop_begin16 17loop_begin:18 %var3 = phi i32 [%var1, %entry], [%var2, %do_something]19 %cond2 = icmp eq i32 %var3, 1020 %cond.and = and i1 %cond1, %cond221 br i1 %cond.and, label %do_something, label %loop_exit22; CHECK: loop_begin:23; CHECK-NEXT: %[[VAR3:.*]] = phi i3224; CHECK-NEXT: %[[COND2:.*]] = icmp eq i32 %[[VAR3]], 1025; CHECK-NEXT: %[[COND_AND:.*]] = and i1 true, %[[COND2]]26; CHECK-NEXT: br i1 %[[COND_AND]], label %do_something, label %loop_exit27 28do_something:29 %var2 = add i32 %var3, 130 call void @some_func() noreturn nounwind31 br label %loop_begin32 33loop_exit:34 ret i32 035}36 37declare void @some_func() noreturn38