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      1 ;; A very basic test to make sure that splitting the backedge keeps working
      2 ;; RUN: opt -place-safepoints -spp-split-backedge=1 -S %s | FileCheck %s
      3 
      4 define void @test(i32, i1 %cond) gc "statepoint-example" {
      5 ; CHECK-LABEL: @test
      6 ; CHECK-LABEL: loop.loop_crit_edge
      7 ; CHECK: gc.statepoint
      8 ; CHECK-NEXT: br label %loop
      9 entry:
     10   br label %loop
     11 
     12 loop:
     13   br i1 %cond, label %loop, label %exit
     14 
     15 exit:
     16   ret void
     17 }
     18 
     19 ; Test for the case where a single conditional branch jumps to two
     20 ; different loop header blocks.  Since we're currently using LoopSimplfy
     21 ; this doesn't hit the interesting case, but once we remove that, we need
     22 ; to be sure this keeps working.
     23 define void @test2(i32, i1 %cond) gc "statepoint-example" {
     24 ; CHECK-LABEL: @test2
     25 ; CHECK-LABEL: loop2.loop2_crit_edge:
     26 ; CHECK: gc.statepoint
     27 ; CHECK-NEXT: br label %loop2
     28 ; CHECK-LABEL: loop2.loop_crit_edge:
     29 ; CHECK: gc.statepoint
     30 ; CHECK-NEXT: br label %loop
     31 entry:
     32   br label %loop
     33 
     34 loop:
     35   br label %loop2
     36 
     37 loop2:
     38   br i1 %cond, label %loop, label %loop2
     39 }
     40 
     41 declare void @do_safepoint()
     42 define void @gc.safepoint_poll() {
     43 entry:
     44   call void @do_safepoint()
     45   ret void
     46 }