1*9880d681SAndroid Build Coastguard Worker; RUN: opt < %s -loop-unswitch -loop-unswitch-threshold=0 -verify-loop-info -S < %s 2>&1 | FileCheck %s 2*9880d681SAndroid Build Coastguard Worker 3*9880d681SAndroid Build Coastguard Worker; This test contains two trivial unswitch condition in one loop. 4*9880d681SAndroid Build Coastguard Worker; LoopUnswitch pass should be able to unswitch the second one 5*9880d681SAndroid Build Coastguard Worker; after unswitching the first one. 6*9880d681SAndroid Build Coastguard Worker 7*9880d681SAndroid Build Coastguard Worker 8*9880d681SAndroid Build Coastguard Worker; CHECK: br i1 %cond1, label %..split_crit_edge, label %.loop_exit.split_crit_edge 9*9880d681SAndroid Build Coastguard Worker 10*9880d681SAndroid Build Coastguard Worker; CHECK: ..split_crit_edge: ; preds = %0 11*9880d681SAndroid Build Coastguard Worker; CHECK: br label %.split 12*9880d681SAndroid Build Coastguard Worker 13*9880d681SAndroid Build Coastguard Worker; CHECK: .split: ; preds = %..split_crit_edge 14*9880d681SAndroid Build Coastguard Worker; CHECK: br i1 %cond2, label %.split..split.split_crit_edge, label %.split.loop_exit.split1_crit_edge 15*9880d681SAndroid Build Coastguard Worker 16*9880d681SAndroid Build Coastguard Worker; CHECK: .split..split.split_crit_edge: ; preds = %.split 17*9880d681SAndroid Build Coastguard Worker; CHECK: br label %.split.split 18*9880d681SAndroid Build Coastguard Worker 19*9880d681SAndroid Build Coastguard Worker; CHECK: .split.split: ; preds = %.split..split.split_crit_edge 20*9880d681SAndroid Build Coastguard Worker; CHECK: br label %loop_begin 21*9880d681SAndroid Build Coastguard Worker 22*9880d681SAndroid Build Coastguard Worker; CHECK: loop_begin: ; preds = %do_something, %.split.split 23*9880d681SAndroid Build Coastguard Worker; CHECK: br i1 true, label %continue, label %loop_exit 24*9880d681SAndroid Build Coastguard Worker 25*9880d681SAndroid Build Coastguard Worker; CHECK: continue: ; preds = %loop_begin 26*9880d681SAndroid Build Coastguard Worker; CHECK: %var_val = load i32, i32* %var 27*9880d681SAndroid Build Coastguard Worker; CHECK: br i1 true, label %do_something, label %loop_exit 28*9880d681SAndroid Build Coastguard Worker 29*9880d681SAndroid Build Coastguard Workerdefine i32 @test(i32* %var, i1 %cond1, i1 %cond2) { 30*9880d681SAndroid Build Coastguard Worker br label %loop_begin 31*9880d681SAndroid Build Coastguard Worker 32*9880d681SAndroid Build Coastguard Workerloop_begin: 33*9880d681SAndroid Build Coastguard Worker br i1 %cond1, label %continue, label %loop_exit ; first trivial condition 34*9880d681SAndroid Build Coastguard Worker 35*9880d681SAndroid Build Coastguard Workercontinue: 36*9880d681SAndroid Build Coastguard Worker %var_val = load i32, i32* %var 37*9880d681SAndroid Build Coastguard Worker br i1 %cond2, label %do_something, label %loop_exit ; second trivial condition 38*9880d681SAndroid Build Coastguard Worker 39*9880d681SAndroid Build Coastguard Workerdo_something: 40*9880d681SAndroid Build Coastguard Worker call void @some_func() noreturn nounwind 41*9880d681SAndroid Build Coastguard Worker br label %loop_begin 42*9880d681SAndroid Build Coastguard Worker 43*9880d681SAndroid Build Coastguard Workerloop_exit: 44*9880d681SAndroid Build Coastguard Worker ret i32 0 45*9880d681SAndroid Build Coastguard Worker} 46*9880d681SAndroid Build Coastguard Worker 47*9880d681SAndroid Build Coastguard Workerdeclare void @some_func() noreturn