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 6 define i32 @test(i1 %cond1, i32 %var1) { 7 entry: 8 br label %loop_begin 9 10 loop_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 19 do_something: 20 %var2 = add i32 %var3, 1 21 call void @some_func() noreturn nounwind 22 br label %loop_begin 23 24 loop_exit: 25 ret i32 0 26 } 27 28 declare void @some_func() noreturn
