Imported Upstream version 5.18.0.246

Former-commit-id: 0c7ce5b1a7851e13f22acfd379b7f9fb304e4833

external/llvm/test/Transforms/PlaceSafepoints/call-in-loop.ll

@@ -0,0 +1,30 @@
+; If there's a call in the loop which dominates the backedge, we 
+; don't need a safepoint poll (since the callee must contain a 
+; poll test).
+;; RUN: opt < %s -place-safepoints -S | FileCheck %s
+
+declare void @foo()
+
+define void @test1() gc "statepoint-example" {
+; CHECK-LABEL: test1
+
+entry:
+; CHECK-LABEL: entry
+; CHECK: call void @do_safepoint
+  br label %loop
+
+loop:
+; CHECK-LABEL: loop
+; CHECK-NOT: call void @do_safepoint
+  call void @foo()
+  br label %loop
+}
+
+; This function is inlined when inserting a poll.
+declare void @do_safepoint()
+define void @gc.safepoint_poll() {
+; CHECK-LABEL: gc.safepoint_poll
+entry:
+  call void @do_safepoint()
+  ret void
+}