llvm/unittests/IR/AbstractCallSiteTest.cpp

   1 //===----- AbstractCallSiteTest.cpp - AbstractCallSite Unittests ----------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include "llvm/AsmParser/Parser.h"
  10 #include "llvm/IR/AbstractCallSite.h"
  11 #include "llvm/IR/Function.h"
  12 #include "llvm/IR/Module.h"
  13 #include "llvm/Support/SourceMgr.h"
  14 #include "gtest/gtest.h"
  15
  16 using namespace llvm;
  17
  18 static std::unique_ptr<Module> parseIR(LLVMContext &C, const char *IR) {
  19   SMDiagnostic Err;
  20   std::unique_ptr<Module> Mod = parseAssemblyString(IR, Err, C);
  21   if (!Mod)
  22     Err.print("AbstractCallSiteTests", errs());
  23   return Mod;
  24 }
  25
  26 TEST(AbstractCallSite, CallbackCall) {
  27   LLVMContext C;
  28
  29   const char *IR =
  30       "define void @callback(i8* %X, i32* %A) {\n"
  31       "  ret void\n"
  32       "}\n"
  33       "define void @foo(i32* %A) {\n"
  34       "  call void (i32, void (i8*, ...)*, ...) @broker(i32 1, void (i8*, ...)* bitcast (void (i8*, i32*)* @callback to void (i8*, ...)*), i32* %A)\n"
  35       "  ret void\n"
  36       "}\n"
  37       "declare !callback !0 void @broker(i32, void (i8*, ...)*, ...)\n"
  38       "!0 = !{!1}\n"
  39       "!1 = !{i64 1, i64 -1, i1 true}";
  40
  41   std::unique_ptr<Module> M = parseIR(C, IR);
  42   ASSERT_TRUE(M);
  43
  44   Function *Callback = M->getFunction("callback");
  45   ASSERT_NE(Callback, nullptr);
  46
  47   const Use *CallbackUse = Callback->getSingleUndroppableUse();
  48   ASSERT_NE(CallbackUse, nullptr);
  49
  50   AbstractCallSite ACS(CallbackUse);
  51   EXPECT_TRUE(ACS);
  52   EXPECT_TRUE(ACS.isCallbackCall());
  53   EXPECT_TRUE(ACS.isCallee(CallbackUse));
  54   EXPECT_EQ(ACS.getCalledFunction(), Callback);
  55 }