test/Transforms/SCCP/issue59602-assume-like-call-users.ll

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

@extern = global i32 0

define i32 @call_assume_self_user() {
; CHECK-LABEL: define {{[^@]+}}@call_assume_self_user() {
; CHECK-NEXT:    [[CALL:%.*]] = call i32 @assume_self_user()
; CHECK-NEXT:    ret i32 0
;
  %call = call i32 @assume_self_user()
  ret i32 0
}

; Function address direct user is assume-like intrinsic.
;
; Make sure this doesn't hit "We can only zap functions where all live
; users have a concrete value"
define internal i32 @assume_self_user() {
; CHECK-LABEL: define {{[^@]+}}@assume_self_user() {
; CHECK-NEXT:    [[OBJSIZE:%.*]] = call i32 @llvm.objectsize.i32.p0(ptr @assume_self_user, i1 false, i1 false, i1 false)
; CHECK-NEXT:    store i32 [[OBJSIZE]], ptr @extern, align 4
; CHECK-NEXT:    ret i32 poison
;
  %objsize = call i32 @llvm.objectsize.i32.p0(ptr @assume_self_user, i1 false, i1 false, i1 false)
  store i32 %objsize, ptr @extern
  ret i32 0
}


; The objectsize call is an "assume like intrinsic" that can be
; ignored for address taken purposes. The user of @constexpr_self_user
; is a constant expression cast, so that the use call site does not
; directly appear as a user.

define i32 @callsite_with_returned() {
; CHECK-LABEL: define {{[^@]+}}@callsite_with_returned() {
; CHECK-NEXT:    [[CALL:%.*]] = call addrspace(1) i32 @constexpr_self_user(i32 123)
; CHECK-NEXT:    ret i32 0
;
  %call = call addrspace(1) i32 @constexpr_self_user(i32 returned 123)
  ret i32 0
}

; Has constexpr cast user in an assume-like intrinsic. Make sure we
; don't assert on a cast<CallBase> for the user, and still remove
; returned from the caller.
define internal i32 @constexpr_self_user(i32 %arg0) addrspace(1) {
; CHECK-LABEL: define {{[^@]+}}@constexpr_self_user
; CHECK-SAME: (i32 [[ARG0:%.*]]) addrspace(1) {
; CHECK-NEXT:    [[OBJSIZE:%.*]] = call i32 @llvm.objectsize.i32.p0(ptr addrspacecast (ptr addrspace(1) @constexpr_self_user to ptr), i1 false, i1 false, i1 false)
; CHECK-NEXT:    store i32 [[OBJSIZE]], ptr @extern, align 4
; CHECK-NEXT:    ret i32 poison
;
  %objsize = call i32 @llvm.objectsize.i32.p0(ptr addrspacecast (ptr addrspace(1) @constexpr_self_user to ptr), i1 false, i1 false, i1 false)
  store i32 %objsize, ptr @extern
  ret i32 %arg0
}

declare i32 @llvm.objectsize.i32.p0(ptr, i1 immarg, i1 immarg, i1 immarg) #0

attributes #0 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }