| ; RUN: opt < %s -loop-unswitch -loop-unswitch-threshold=0 -S 2>&1 | FileCheck %s |
| |
| ; This is to test trivial loop unswitch only happens when trivial condition |
| ; itself is an LIV loop condition (not partial LIV which could occur in and/or). |
| |
| define i32 @test(i1 %cond1, i32 %var1) { |
| entry: |
| br label %loop_begin |
| |
| loop_begin: |
| %var3 = phi i32 [%var1, %entry], [%var2, %do_something] |
| %cond2 = icmp eq i32 %var3, 10 |
| %cond.and = and i1 %cond1, %cond2 |
| |
| ; %cond.and only has %cond1 as LIV so no unswitch should happen. |
| ; CHECK: br i1 %cond.and, label %do_something, label %loop_exit |
| br i1 %cond.and, label %do_something, label %loop_exit |
| |
| do_something: |
| %var2 = add i32 %var3, 1 |
| call void @some_func() noreturn nounwind |
| br label %loop_begin |
| |
| loop_exit: |
| ret i32 0 |
| } |
| |
| declare void @some_func() noreturn |
