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 4define 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 9entry: 10 br label %loop 11 12loop: 13 br i1 %cond, label %loop, label %exit 14 15exit: 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. 23define void @test2(i32, i1 %cond) gc "statepoint-example" { 24; CHECK-LABEL: @test2 25; CHECK-LABE: loop.loopexit.split 26; CHECK: gc.statepoint 27; CHECK-NEXT: br label %loop 28; CHECK-LABEL: loop2.loop2_crit_edge 29; CHECK: gc.statepoint 30; CHECK-NEXT: br label %loop2 31entry: 32 br label %loop 33 34loop: 35 br label %loop2 36 37loop2: 38 br i1 %cond, label %loop, label %loop2 39} 40 41declare void @do_safepoint() 42define void @gc.safepoint_poll() { 43entry: 44 call void @do_safepoint() 45 ret void 46} 47