76 lines
3.0 KiB
C++
76 lines
3.0 KiB
C++
//=======- CaptureTrackingTest.cpp - Unit test for the Capture Tracking ---===//
|
|
//
|
|
// 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/Analysis/CaptureTracking.h"
|
|
#include "llvm/AsmParser/Parser.h"
|
|
#include "llvm/IR/Dominators.h"
|
|
#include "llvm/IR/Instructions.h"
|
|
#include "llvm/IR/LLVMContext.h"
|
|
#include "llvm/IR/Module.h"
|
|
#include "llvm/Support/SourceMgr.h"
|
|
#include "gtest/gtest.h"
|
|
|
|
using namespace llvm;
|
|
|
|
TEST(CaptureTracking, MaxUsesToExplore) {
|
|
StringRef Assembly = R"(
|
|
; Function Attrs: nounwind ssp uwtable
|
|
declare void @doesnt_capture(i8* nocapture, i8* nocapture, i8* nocapture,
|
|
i8* nocapture, i8* nocapture)
|
|
|
|
; %arg has 5 uses
|
|
define void @test_few_uses(i8* %arg) {
|
|
call void @doesnt_capture(i8* %arg, i8* %arg, i8* %arg, i8* %arg, i8* %arg)
|
|
ret void
|
|
}
|
|
|
|
; %arg has 50 uses
|
|
define void @test_many_uses(i8* %arg) {
|
|
call void @doesnt_capture(i8* %arg, i8* %arg, i8* %arg, i8* %arg, i8* %arg)
|
|
call void @doesnt_capture(i8* %arg, i8* %arg, i8* %arg, i8* %arg, i8* %arg)
|
|
call void @doesnt_capture(i8* %arg, i8* %arg, i8* %arg, i8* %arg, i8* %arg)
|
|
call void @doesnt_capture(i8* %arg, i8* %arg, i8* %arg, i8* %arg, i8* %arg)
|
|
call void @doesnt_capture(i8* %arg, i8* %arg, i8* %arg, i8* %arg, i8* %arg)
|
|
call void @doesnt_capture(i8* %arg, i8* %arg, i8* %arg, i8* %arg, i8* %arg)
|
|
call void @doesnt_capture(i8* %arg, i8* %arg, i8* %arg, i8* %arg, i8* %arg)
|
|
call void @doesnt_capture(i8* %arg, i8* %arg, i8* %arg, i8* %arg, i8* %arg)
|
|
call void @doesnt_capture(i8* %arg, i8* %arg, i8* %arg, i8* %arg, i8* %arg)
|
|
call void @doesnt_capture(i8* %arg, i8* %arg, i8* %arg, i8* %arg, i8* %arg)
|
|
ret void
|
|
}
|
|
)";
|
|
|
|
LLVMContext Context;
|
|
SMDiagnostic Error;
|
|
auto M = parseAssemblyString(Assembly, Error, Context);
|
|
ASSERT_TRUE(M) << "Bad assembly?";
|
|
|
|
auto Test = [&M](const char *FName, unsigned FalseMaxUsesLimit,
|
|
unsigned TrueMaxUsesLimit) {
|
|
Function *F = M->getFunction(FName);
|
|
ASSERT_NE(F, nullptr);
|
|
Value *Arg = &*F->arg_begin();
|
|
ASSERT_NE(Arg, nullptr);
|
|
ASSERT_FALSE(PointerMayBeCaptured(Arg, true, true, FalseMaxUsesLimit));
|
|
ASSERT_TRUE(PointerMayBeCaptured(Arg, true, true, TrueMaxUsesLimit));
|
|
|
|
BasicBlock *EntryBB = &F->getEntryBlock();
|
|
DominatorTree DT(*F);
|
|
|
|
Instruction *Ret = EntryBB->getTerminator();
|
|
ASSERT_TRUE(isa<ReturnInst>(Ret));
|
|
ASSERT_FALSE(PointerMayBeCapturedBefore(Arg, true, true, Ret, &DT, false,
|
|
FalseMaxUsesLimit));
|
|
ASSERT_TRUE(PointerMayBeCapturedBefore(Arg, true, true, Ret, &DT, false,
|
|
TrueMaxUsesLimit));
|
|
};
|
|
|
|
Test("test_few_uses", 6, 4);
|
|
Test("test_many_uses", 50, 30);
|
|
}
|