1; RUN: opt < %s -simple-loop-unswitch -S 2>&1 | FileCheck %s 2; RUN: opt < %s -simple-loop-unswitch -enable-mssa-loop-dependency=true -verify-memoryssa -S 2>&1 | FileCheck %s 3 4; This is to test trivial loop unswitch only happens when trivial condition 5; itself is an LIV loop condition (not partial LIV which could occur in and/or). 6 7define i32 @test(i1 %cond1, i32 %var1) { 8; CHECK-LABEL: define i32 @test( 9entry: 10 br label %loop_begin 11; CHECK-NEXT: entry: 12; CHECK-NEXT: br i1 %cond1, label %entry.split, label %loop_exit.split 13; 14; CHECK: entry.split: 15; CHECK-NEXT: br label %loop_begin 16 17loop_begin: 18 %var3 = phi i32 [%var1, %entry], [%var2, %do_something] 19 %cond2 = icmp eq i32 %var3, 10 20 %cond.and = and i1 %cond1, %cond2 21 br i1 %cond.and, label %do_something, label %loop_exit 22; CHECK: loop_begin: 23; CHECK-NEXT: %[[VAR3:.*]] = phi i32 24; CHECK-NEXT: %[[COND2:.*]] = icmp eq i32 %[[VAR3]], 10 25; CHECK-NEXT: %[[COND_AND:.*]] = and i1 true, %[[COND2]] 26; CHECK-NEXT: br i1 %[[COND_AND]], label %do_something, label %loop_exit 27 28do_something: 29 %var2 = add i32 %var3, 1 30 call void @some_func() noreturn nounwind 31 br label %loop_begin 32 33loop_exit: 34 ret i32 0 35} 36 37declare void @some_func() noreturn 38