llvm/test/Transforms/RewriteStatepointsForGC/leaf-function.ll

   1 ; RUN: opt < %s -S -passes=rewrite-statepoints-for-gc | FileCheck %s
   2
   3 declare void @foo() "gc-leaf-function"
   4 declare void @bar()
   5
   6 ; Calls of functions with the "gc-leaf-function" attribute shouldn't be turned
   7 ; into a safepoint.  An entry safepoint should get inserted, though.
   8 define void @test_leaf_function() gc "statepoint-example" {
   9 ; CHECK-LABEL: test_leaf_function
  10 ; CHECK-NOT: gc.statepoint
  11 ; CHECK-NOT: gc.result
  12 entry:
  13   call void @foo()
  14   ret void
  15 }
  16
  17 define void @test_leaf_function_call() gc "statepoint-example" {
  18 ; CHECK-LABEL: test_leaf_function_call
  19 ; CHECK-NOT: gc.statepoint
  20 ; CHECK-NOT: gc.result
  21 entry:
  22   call void @bar() "gc-leaf-function"
  23   ret void
  24 }
  25
  26 ; This function is inlined when inserting a poll.
  27 declare void @do_safepoint()
  28 define void @gc.safepoint_poll() {
  29 ; CHECK-LABEL: gc.safepoint_poll
  30 entry:
  31   call void @do_safepoint()
  32   ret void
  33 }