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//===----- AbstractCallSiteTest.cpp - AbstractCallSite Unittests ----------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "llvm/IR/AbstractCallSite.h"
#include "llvm/AsmParser/Parser.h"
#include "llvm/IR/Argument.h"
#include "llvm/IR/Function.h"
#include "llvm/IR/Module.h"
#include "llvm/Support/SourceMgr.h"
#include "gtest/gtest.h"
using namespace llvm;
static std::unique_ptr<Module> parseIR(LLVMContext &C, const char *IR) {
SMDiagnostic Err;
std::unique_ptr<Module> Mod = parseAssemblyString(IR, Err, C);
if (!Mod)
Err.print("AbstractCallSiteTests", errs());
return Mod;
}
TEST(AbstractCallSite, CallbackCall) {
LLVMContext C;
const char *IR =
"define void @callback(i8* %X, i32* %A) {\n"
" ret void\n"
"}\n"
"define void @foo(i32* %A) {\n"
" call void (i32, void (i8*, ...)*, ...) @broker(i32 1, void (i8*, ...)* bitcast (void (i8*, i32*)* @callback to void (i8*, ...)*), i32* %A)\n"
" ret void\n"
"}\n"
"declare !callback !0 void @broker(i32, void (i8*, ...)*, ...)\n"
"!0 = !{!1}\n"
"!1 = !{i64 1, i64 -1, i1 true}";
std::unique_ptr<Module> M = parseIR(C, IR);
ASSERT_TRUE(M);
Function *Callback = M->getFunction("callback");
ASSERT_NE(Callback, nullptr);
const Use *CallbackUse = Callback->getSingleUndroppableUse();
ASSERT_NE(CallbackUse, nullptr);
AbstractCallSite ACS(CallbackUse);
EXPECT_TRUE(ACS);
EXPECT_TRUE(ACS.isCallbackCall());
EXPECT_TRUE(ACS.isCallee(CallbackUse));
EXPECT_EQ(ACS.getCalleeUseForCallback(), *CallbackUse);
EXPECT_EQ(ACS.getCalledFunction(), Callback);
// The callback metadata {CallbackNo, Arg0No, ..., isVarArg} = {1, -1, true}
EXPECT_EQ(ACS.getCallArgOperandNoForCallee(), 1);
// Though the callback metadata only specifies ONE unfixed argument No, the
// callback callee is vararg, hence the third arg is also considered as
// another arg for the callback.
EXPECT_EQ(ACS.getNumArgOperands(), 2u);
Argument *Param0 = Callback->getArg(0), *Param1 = Callback->getArg(1);
ASSERT_TRUE(Param0 && Param1);
EXPECT_EQ(ACS.getCallArgOperandNo(*Param0), -1);
EXPECT_EQ(ACS.getCallArgOperandNo(*Param1), 2);
}
TEST(AbstractCallSite, DirectCall) {
LLVMContext C;
const char *IR = "declare void @bar(i32 %x, i32 %y)\n"
"define void @foo() {\n"
" call void @bar(i32 1, i32 2)\n"
" ret void\n"
"}\n";
std::unique_ptr<Module> M = parseIR(C, IR);
ASSERT_TRUE(M);
Function *Callee = M->getFunction("bar");
ASSERT_NE(Callee, nullptr);
const Use *DirectCallUse = Callee->getSingleUndroppableUse();
ASSERT_NE(DirectCallUse, nullptr);
AbstractCallSite ACS(DirectCallUse);
EXPECT_TRUE(ACS);
EXPECT_TRUE(ACS.isDirectCall());
EXPECT_TRUE(ACS.isCallee(DirectCallUse));
EXPECT_EQ(ACS.getCalledFunction(), Callee);
EXPECT_EQ(ACS.getNumArgOperands(), 2u);
Argument *ArgX = Callee->getArg(0);
ASSERT_NE(ArgX, nullptr);
Value *CAO1 = ACS.getCallArgOperand(*ArgX);
Value *CAO2 = ACS.getCallArgOperand(0);
ASSERT_NE(CAO2, nullptr);
// The two call arg operands should be the same object, since they are both
// the first argument of the call.
EXPECT_EQ(CAO2, CAO1);
ConstantInt *FirstArgInt = dyn_cast<ConstantInt>(CAO2);
ASSERT_NE(FirstArgInt, nullptr);
EXPECT_EQ(FirstArgInt->getZExtValue(), 1ull);
EXPECT_EQ(ACS.getCallArgOperandNo(*ArgX), 0);
EXPECT_EQ(ACS.getCallArgOperandNo(0), 0);
EXPECT_EQ(ACS.getCallArgOperandNo(1), 1);
}
TEST(AbstractCallSite, IndirectCall) {
LLVMContext C;
const char *IR = "define void @foo(ptr %0) {\n"
" call void %0(i32 1, i32 2)\n"
" ret void\n"
"}\n";
std::unique_ptr<Module> M = parseIR(C, IR);
ASSERT_TRUE(M);
Function *Fun = M->getFunction("foo");
ASSERT_NE(Fun, nullptr);
Argument *ArgAsCallee = Fun->getArg(0);
ASSERT_NE(ArgAsCallee, nullptr);
const Use *IndCallUse = ArgAsCallee->getSingleUndroppableUse();
ASSERT_NE(IndCallUse, nullptr);
AbstractCallSite ACS(IndCallUse);
EXPECT_TRUE(ACS);
EXPECT_TRUE(ACS.isIndirectCall());
EXPECT_TRUE(ACS.isCallee(IndCallUse));
EXPECT_EQ(ACS.getCalledFunction(), nullptr);
EXPECT_EQ(ACS.getCalledOperand(), ArgAsCallee);
EXPECT_EQ(ACS.getNumArgOperands(), 2u);
Value *CalledOperand = ACS.getCallArgOperand(0);
ASSERT_NE(CalledOperand, nullptr);
ConstantInt *FirstArgInt = dyn_cast<ConstantInt>(CalledOperand);
ASSERT_NE(FirstArgInt, nullptr);
EXPECT_EQ(FirstArgInt->getZExtValue(), 1ull);
EXPECT_EQ(ACS.getCallArgOperandNo(0), 0);
EXPECT_EQ(ACS.getCallArgOperandNo(1), 1);
}
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