llvm/unittests/CodeGen/GlobalISel/CallLowering.cpp

   1 //===- CallLowering.cpp - CallLowering unit tests -------------------------===//
   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/CodeGen/GlobalISel/CallLowering.h"
  10 #include "llvm/ADT/StringRef.h"
  11 #include "llvm/AsmParser/Parser.h"
  12 #include "llvm/IR/LLVMContext.h"
  13 #include "llvm/IR/Module.h"
  14 #include "llvm/Support/SourceMgr.h"
  15 #include "gtest/gtest.h"
  16
  17 using namespace llvm;
  18
  19 namespace {
  20 struct TargetCallLoweringTest : public CallLowering, testing::Test {
  21   LLVMContext C;
  22
  23 public:
  24   TargetCallLoweringTest() : CallLowering(nullptr) {}
  25
  26   std::unique_ptr<Module> parseIR(const char *IR) {
  27     SMDiagnostic Err;
  28     std::unique_ptr<Module> Mod = parseAssemblyString(IR, Err, C);
  29     if (!Mod)
  30       Err.print("TestTargetCallLoweringTest", errs());
  31     return Mod;
  32   }
  33 };
  34 } // namespace
  35
  36 TEST_F(TargetCallLoweringTest, ArgByRef) {
  37   std::unique_ptr<Module> M = parseIR(R"(
  38 define void @foo(ptr %p0, ptr byref(i32) align(4) %p1) {
  39   ret void
  40 }
  41 )");
  42   const DataLayout &DL = M->getDataLayout();
  43   Function *F = M->getFunction("foo");
  44   // Dummy vregs.
  45   SmallVector<Register, 4> VRegs(1, 1);
  46
  47   CallLowering::ArgInfo Arg0(VRegs, F->getArg(0)->getType(), 0);
  48   setArgFlags(Arg0, AttributeList::FirstArgIndex + 0, DL, *F);
  49   EXPECT_TRUE(Arg0.Flags[0].isPointer());
  50   EXPECT_FALSE(Arg0.Flags[0].isByRef());
  51
  52   CallLowering::ArgInfo Arg1(VRegs, F->getArg(1)->getType(), 1);
  53   setArgFlags(Arg1, AttributeList::FirstArgIndex + 1, DL, *F);
  54   EXPECT_TRUE(Arg1.Flags[0].isPointer());
  55   EXPECT_TRUE(Arg1.Flags[0].isByRef());
  56   EXPECT_EQ(Arg1.Flags[0].getByRefSize(), 4U);
  57 }