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//===- GIMatchTableExecutorTest.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/CodeGen/GlobalISel/GIMatchTableExecutor.h"
#include "gtest/gtest.h"
using namespace llvm;
TEST(GlobalISelLEB128Test, fastDecodeULEB128) {
#define EXPECT_DECODE_ULEB128_EQ(EXPECTED, VALUE) \
do { \
uint64_t ActualSize = 0; \
uint64_t Actual = GIMatchTableExecutor::fastDecodeULEB128( \
reinterpret_cast<const uint8_t *>(VALUE), ActualSize); \
EXPECT_EQ(sizeof(VALUE) - 1, ActualSize); \
EXPECT_EQ(EXPECTED, Actual); \
} while (0)
EXPECT_DECODE_ULEB128_EQ(0u, "\x00");
EXPECT_DECODE_ULEB128_EQ(1u, "\x01");
EXPECT_DECODE_ULEB128_EQ(63u, "\x3f");
EXPECT_DECODE_ULEB128_EQ(64u, "\x40");
EXPECT_DECODE_ULEB128_EQ(0x7fu, "\x7f");
EXPECT_DECODE_ULEB128_EQ(0x80u, "\x80\x01");
EXPECT_DECODE_ULEB128_EQ(0x81u, "\x81\x01");
EXPECT_DECODE_ULEB128_EQ(0x90u, "\x90\x01");
EXPECT_DECODE_ULEB128_EQ(0xffu, "\xff\x01");
EXPECT_DECODE_ULEB128_EQ(0x100u, "\x80\x02");
EXPECT_DECODE_ULEB128_EQ(0x101u, "\x81\x02");
EXPECT_DECODE_ULEB128_EQ(4294975616ULL, "\x80\xc1\x80\x80\x10");
// Decode ULEB128 with extra padding bytes
EXPECT_DECODE_ULEB128_EQ(0u, "\x80\x00");
EXPECT_DECODE_ULEB128_EQ(0u, "\x80\x80\x00");
EXPECT_DECODE_ULEB128_EQ(0x7fu, "\xff\x00");
EXPECT_DECODE_ULEB128_EQ(0x7fu, "\xff\x80\x00");
EXPECT_DECODE_ULEB128_EQ(0x80u, "\x80\x81\x00");
EXPECT_DECODE_ULEB128_EQ(0x80u, "\x80\x81\x80\x00");
EXPECT_DECODE_ULEB128_EQ(0x80u, "\x80\x81\x80\x80\x80\x80\x80\x80\x80\x00");
EXPECT_DECODE_ULEB128_EQ(0x80000000'00000000ul,
"\x80\x80\x80\x80\x80\x80\x80\x80\x80\x01");
#undef EXPECT_DECODE_ULEB128_EQ
}
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