llvm/test/Transforms/WholeProgramDevirt/import.ll

; RUN: opt -S -wholeprogramdevirt -wholeprogramdevirt-summary-action=import -wholeprogramdevirt-read-summary=%S/Inputs/import-single-impl.yaml < %s | FileCheck --check-prefixes=CHECK,SINGLE-IMPL %s
; RUN: opt -S -wholeprogramdevirt -wholeprogramdevirt-summary-action=import -wholeprogramdevirt-read-summary=%S/Inputs/import-uniform-ret-val.yaml < %s | FileCheck --check-prefixes=CHECK,UNIFORM-RET-VAL %s

target datalayout = "e-p:64:64"
target triple = "x86_64-unknown-linux-gnu"

; Test cases where the argument values are known and we can apply virtual
; constant propagation.

; CHECK: define i32 @call1
define i32 @call1(i8* %obj) {
  %vtableptr = bitcast i8* %obj to [3 x i8*]**
  %vtable = load [3 x i8*]*, [3 x i8*]** %vtableptr
  %vtablei8 = bitcast [3 x i8*]* %vtable to i8*
  %p = call i1 @llvm.type.test(i8* %vtablei8, metadata !"typeid1")
  call void @llvm.assume(i1 %p)
  %fptrptr = getelementptr [3 x i8*], [3 x i8*]* %vtable, i32 0, i32 0
  %fptr = load i8*, i8** %fptrptr
  %fptr_casted = bitcast i8* %fptr to i32 (i8*, i32)*
  ; SINGLE-IMPL: call i32 bitcast (void ()* @singleimpl1 to i32 (i8*, i32)*)
  %result = call i32 %fptr_casted(i8* %obj, i32 1)
  ; UNIFORM-RET-VAL: ret i32 42
  ret i32 %result
}

; Test cases where the argument values are unknown, so we cannot apply virtual
; constant propagation.

; CHECK: define i1 @call2
define i1 @call2(i8* %obj) {
  %vtableptr = bitcast i8* %obj to [1 x i8*]**
  %vtable = load [1 x i8*]*, [1 x i8*]** %vtableptr
  %vtablei8 = bitcast [1 x i8*]* %vtable to i8*
  %pair = call {i8*, i1} @llvm.type.checked.load(i8* %vtablei8, i32 8, metadata !"typeid2")
  %fptr = extractvalue {i8*, i1} %pair, 0
  %p = extractvalue {i8*, i1} %pair, 1
  ; SINGLE-IMPL: br i1 true,
  br i1 %p, label %cont, label %trap

cont:
  %fptr_casted = bitcast i8* %fptr to i1 (i8*, i32)*
  ; SINGLE-IMPL: call i1 bitcast (void ()* @singleimpl2 to i1 (i8*, i32)*)
  ; UNIFORM-RET-VAL: call i1 %
  %result = call i1 %fptr_casted(i8* %obj, i32 undef)
  ret i1 %result

trap:
  call void @llvm.trap()
  unreachable
}

; SINGLE-IMPL-DAG: declare void @singleimpl1()
; SINGLE-IMPL-DAG: declare void @singleimpl2()

declare void @llvm.assume(i1)
declare void @llvm.trap()
declare {i8*, i1} @llvm.type.checked.load(i8*, i32, metadata)
declare i1 @llvm.type.test(i8*, metadata)