1*9880d681SAndroid Build Coastguard Worker; RUN: opt < %s -loop-unswitch -loop-unswitch-threshold=0 -S 2>&1 | FileCheck %s 2*9880d681SAndroid Build Coastguard Worker 3*9880d681SAndroid Build Coastguard Worker; This is to test trivial loop unswitch only happens when trivial condition 4*9880d681SAndroid Build Coastguard Worker; itself is an LIV loop condition (not partial LIV which could occur in and/or). 5*9880d681SAndroid Build Coastguard Worker 6*9880d681SAndroid Build Coastguard Workerdefine i32 @test(i1 %cond1, i32 %var1) { 7*9880d681SAndroid Build Coastguard Workerentry: 8*9880d681SAndroid Build Coastguard Worker br label %loop_begin 9*9880d681SAndroid Build Coastguard Worker 10*9880d681SAndroid Build Coastguard Workerloop_begin: 11*9880d681SAndroid Build Coastguard Worker %var3 = phi i32 [%var1, %entry], [%var2, %do_something] 12*9880d681SAndroid Build Coastguard Worker %cond2 = icmp eq i32 %var3, 10 13*9880d681SAndroid Build Coastguard Worker %cond.and = and i1 %cond1, %cond2 14*9880d681SAndroid Build Coastguard Worker 15*9880d681SAndroid Build Coastguard Worker; %cond.and only has %cond1 as LIV so no unswitch should happen. 16*9880d681SAndroid Build Coastguard Worker; CHECK: br i1 %cond.and, label %do_something, label %loop_exit 17*9880d681SAndroid Build Coastguard Worker br i1 %cond.and, label %do_something, label %loop_exit 18*9880d681SAndroid Build Coastguard Worker 19*9880d681SAndroid Build Coastguard Workerdo_something: 20*9880d681SAndroid Build Coastguard Worker %var2 = add i32 %var3, 1 21*9880d681SAndroid Build Coastguard Worker call void @some_func() noreturn nounwind 22*9880d681SAndroid Build Coastguard Worker br label %loop_begin 23*9880d681SAndroid Build Coastguard Worker 24*9880d681SAndroid Build Coastguard Workerloop_exit: 25*9880d681SAndroid Build Coastguard Worker ret i32 0 26*9880d681SAndroid Build Coastguard Worker} 27*9880d681SAndroid Build Coastguard Worker 28*9880d681SAndroid Build Coastguard Workerdeclare void @some_func() noreturn