llvm/test/Transforms/FunctionAttrs/read-write-scc.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --function-signature --check-attributes
; RUN: opt -S -passes=function-attrs < %s | FileCheck %s

@i = global i32 0

define void @foo() {
; CHECK: Function Attrs: nofree nosync nounwind
; CHECK-LABEL: define {{[^@]+}}@foo
; CHECK-SAME: () #[[ATTR0:[0-9]+]] {
; CHECK-NEXT:    store i32 1, ptr @i, align 4
; CHECK-NEXT:    call void @bar()
; CHECK-NEXT:    ret void
;
  store i32 1, ptr @i
  call void @bar()
  ret void
}

define void @bar() {
; CHECK: Function Attrs: nofree nosync nounwind
; CHECK-LABEL: define {{[^@]+}}@bar
; CHECK-SAME: () #[[ATTR0]] {
; CHECK-NEXT:    [[I:%.*]] = load i32, ptr @i, align 4
; CHECK-NEXT:    call void @foo()
; CHECK-NEXT:    ret void
;
  %i = load i32, ptr @i
  call void @foo()
  ret void
}