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//===--- EphemeralValuesCache.cpp -----------------------------------------===//
//
// 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/EphemeralValuesCache.h"
#include "llvm/Analysis/AssumptionCache.h"
#include "llvm/AsmParser/Parser.h"
#include "llvm/IR/LLVMContext.h"
#include "llvm/IR/Module.h"
#include "llvm/Support/SourceMgr.h"
#include "gmock/gmock-matchers.h"
#include "gtest/gtest.h"
using namespace llvm;
namespace {
struct EphemeralValuesCacheTest : public testing::Test {
LLVMContext Ctx;
std::unique_ptr<Module> M;
void parseIR(const char *Assembly) {
SMDiagnostic Error;
M = parseAssemblyString(Assembly, Error, Ctx);
if (!M)
Error.print("EphemeralValuesCacheTest", errs());
}
};
TEST_F(EphemeralValuesCacheTest, basic) {
parseIR(R"IR(
declare void @llvm.assume(i1)
define void @foo(i8 %arg0, i8 %arg1) {
%c0 = icmp eq i8 %arg0, 0
call void @llvm.assume(i1 %c0)
call void @foo(i8 %arg0, i8 %arg1)
%c1 = icmp eq i8 %arg1, 0
call void @llvm.assume(i1 %c1)
ret void
}
)IR");
Function *F = M->getFunction("foo");
auto *BB = &*F->begin();
AssumptionCache AC(*F);
EphemeralValuesCache EVC(*F, AC);
auto It = BB->begin();
auto *C0 = &*It++;
auto *Assume0 = &*It++;
[[maybe_unused]] auto *NotEph = &*It++;
auto *C1 = &*It++;
auto *Assume1 = &*It++;
[[maybe_unused]] auto *Ret = &*It++;
// Check emphemeral values.
EXPECT_THAT(EVC.ephValues(),
testing::UnorderedElementsAre(C0, Assume0, C1, Assume1));
// Clear the cache and try again.
EVC.clear();
EXPECT_THAT(EVC.ephValues(),
testing::UnorderedElementsAre(C0, Assume0, C1, Assume1));
// Modify the IR, clear cache and recompute.
Assume1->eraseFromParent();
C1->eraseFromParent();
EXPECT_THAT(EVC.ephValues(),
testing::UnorderedElementsAre(C0, Assume0, C1, Assume1));
EVC.clear();
EXPECT_THAT(EVC.ephValues(), testing::UnorderedElementsAre(C0, Assume0));
}
} // namespace
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