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

   1 ; RUN: opt < %s -S -rewrite-statepoints-for-gc | FileCheck %s
   2 ; RUN: opt < %s -S -passes=rewrite-statepoints-for-gc | FileCheck %s
   3
   4 declare void @foo() "gc-leaf-function"
   5 declare void @bar()
   6
   7 ; Calls of functions with the "gc-leaf-function" attribute shouldn't be turned
   8 ; into a safepoint.  An entry safepoint should get inserted, though.
   9 define void @test_leaf_function() gc "statepoint-example" {
  10 ; CHECK-LABEL: test_leaf_function
  11 ; CHECK-NOT: gc.statepoint
  12 ; CHECK-NOT: gc.result
  13 entry:
  14   call void @foo()
  15   ret void
  16 }
  17
  18 define void @test_leaf_function_call() gc "statepoint-example" {
  19 ; CHECK-LABEL: test_leaf_function_call
  20 ; CHECK-NOT: gc.statepoint
  21 ; CHECK-NOT: gc.result
  22 entry:
  23   call void @bar() "gc-leaf-function"
  24   ret void
  25 }
  26
  27 ; This function is inlined when inserting a poll.
  28 declare void @do_safepoint()
  29 define void @gc.safepoint_poll() {
  30 ; CHECK-LABEL: gc.safepoint_poll
  31 entry:
  32   call void @do_safepoint()
  33   ret void
  34 }