75 lines
2.2 KiB
C++
75 lines
2.2 KiB
C++
//===--- EphemeralValuesCache.cpp -----------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Analysis/EphemeralValuesCache.h"
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#include "llvm/Analysis/AssumptionCache.h"
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#include "llvm/AsmParser/Parser.h"
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#include "llvm/IR/LLVMContext.h"
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#include "llvm/IR/Module.h"
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#include "llvm/Support/SourceMgr.h"
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#include "gmock/gmock-matchers.h"
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#include "gtest/gtest.h"
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using namespace llvm;
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namespace {
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struct EphemeralValuesCacheTest : public testing::Test {
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LLVMContext Ctx;
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std::unique_ptr<Module> M;
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void parseIR(const char *Assembly) {
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SMDiagnostic Error;
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M = parseAssemblyString(Assembly, Error, Ctx);
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if (!M)
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Error.print("EphemeralValuesCacheTest", errs());
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}
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};
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TEST_F(EphemeralValuesCacheTest, basic) {
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parseIR(R"IR(
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declare void @llvm.assume(i1)
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define void @foo(i8 %arg0, i8 %arg1) {
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%c0 = icmp eq i8 %arg0, 0
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call void @llvm.assume(i1 %c0)
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call void @foo(i8 %arg0, i8 %arg1)
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%c1 = icmp eq i8 %arg1, 0
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call void @llvm.assume(i1 %c1)
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ret void
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}
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)IR");
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Function *F = M->getFunction("foo");
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auto *BB = &*F->begin();
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AssumptionCache AC(*F);
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EphemeralValuesCache EVC(*F, AC);
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auto It = BB->begin();
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auto *C0 = &*It++;
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auto *Assume0 = &*It++;
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[[maybe_unused]] auto *NotEph = &*It++;
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auto *C1 = &*It++;
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auto *Assume1 = &*It++;
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[[maybe_unused]] auto *Ret = &*It++;
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// Check emphemeral values.
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EXPECT_THAT(EVC.ephValues(),
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testing::UnorderedElementsAre(C0, Assume0, C1, Assume1));
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// Clear the cache and try again.
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EVC.clear();
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EXPECT_THAT(EVC.ephValues(),
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testing::UnorderedElementsAre(C0, Assume0, C1, Assume1));
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// Modify the IR, clear cache and recompute.
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Assume1->eraseFromParent();
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C1->eraseFromParent();
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EXPECT_THAT(EVC.ephValues(),
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testing::UnorderedElementsAre(C0, Assume0, C1, Assume1));
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EVC.clear();
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EXPECT_THAT(EVC.ephValues(), testing::UnorderedElementsAre(C0, Assume0));
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}
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} // namespace
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