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