1 ; RUN: opt < %s -simple-loop-unswitch -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 ; CHECK-LABEL: define i32 @test( 8 entry: 9 br label %loop_begin 10 ; CHECK-NEXT: entry: 11 ; CHECK-NEXT: br i1 %cond1, label %entry.split, label %loop_exit.split 12 ; 13 ; CHECK: entry.split: 14 ; CHECK-NEXT: br label %loop_begin 15 16 loop_begin: 17 %var3 = phi i32 [%var1, %entry], [%var2, %do_something] 18 %cond2 = icmp eq i32 %var3, 10 19 %cond.and = and i1 %cond1, %cond2 20 br i1 %cond.and, label %do_something, label %loop_exit 21 ; CHECK: loop_begin: 22 ; CHECK-NEXT: %[[VAR3:.*]] = phi i32 23 ; CHECK-NEXT: %[[COND2:.*]] = icmp eq i32 %[[VAR3]], 10 24 ; CHECK-NEXT: %[[COND_AND:.*]] = and i1 true, %[[COND2]] 25 ; CHECK-NEXT: br i1 %[[COND_AND]], label %do_something, label %loop_exit 26 27 do_something: 28 %var2 = add i32 %var3, 1 29 call void @some_func() noreturn nounwind 30 br label %loop_begin 31 32 loop_exit: 33 ret i32 0 34 } 35 36 declare void @some_func() noreturn 37
