/*
 * libbinrec: a recompiling translator for machine code
 * Copyright (c) 2016 Andrew Church <achurch@achurch.org>
 *
 * This software may be copied and redistributed under certain conditions;
 * see the file "COPYING" in the source code distribution for details.
 * NO WARRANTY is provided with this software.
 */

#include "tests/common.h"
#include "tests/host-x86/common.h"


static const binrec_setup_t setup = {
    .host = BINREC_ARCH_X86_64_SYSV,
};
static const unsigned int host_opt = 0;

static int add_rtl(RTLUnit *unit)
{
    int reg1, reg2, reg3, alias1, alias2, label1;
    EXPECT(reg1 = rtl_alloc_register(unit, RTLTYPE_ADDRESS));
    EXPECT(rtl_add_insn(unit, RTLOP_LOAD_ARG, reg1, 0, 0, 0));
    EXPECT(alias1 = rtl_alloc_alias_register(unit, RTLTYPE_INT32));
    rtl_set_alias_storage(unit, alias1, reg1, 0x1234);
    EXPECT(alias2 = rtl_alloc_alias_register(unit, RTLTYPE_INT32));
    rtl_set_alias_storage(unit, alias2, reg1, 0x5678);
    EXPECT(reg2 = rtl_alloc_register(unit, RTLTYPE_INT32));
    EXPECT(rtl_add_insn(unit, RTLOP_LOAD_IMM, reg2, 0, 0, 2));
    EXPECT(rtl_add_insn(unit, RTLOP_SET_ALIAS, 0, reg2, 0, alias1));
    EXPECT(reg3 = rtl_alloc_register(unit, RTLTYPE_INT32));
    EXPECT(rtl_add_insn(unit, RTLOP_LOAD_IMM, reg3, 0, 0, 3));
    EXPECT(rtl_add_insn(unit, RTLOP_SET_ALIAS, 0, reg3, 0, alias2));
    EXPECT(label1 = rtl_alloc_label(unit));
    /* The EAX/ECX merge collision should trigger a reload conflict here,
     * so that EAX is left untouched on the not-taken side of the branch. */
    EXPECT(rtl_add_insn(unit, RTLOP_GOTO_IF_Z, 0, reg3, 0, label1));

    int reg4, reg5, reg6, label2;
    EXPECT(label2 = rtl_alloc_label(unit));
    EXPECT(rtl_add_insn(unit, RTLOP_LABEL, 0, 0, 0, label2));
    EXPECT(reg4 = rtl_alloc_register(unit, RTLTYPE_INT32));
    EXPECT(rtl_add_insn(unit, RTLOP_GET_ALIAS, reg4, 0, 0, alias1));  // EAX
    EXPECT(reg5 = rtl_alloc_register(unit, RTLTYPE_INT32));
    EXPECT(rtl_add_insn(unit, RTLOP_LOAD_IMM, reg5, 0, 0, 5));  // ECX
    EXPECT(reg6 = rtl_alloc_register(unit, RTLTYPE_INT32));
    EXPECT(rtl_add_insn(unit, RTLOP_ADD, reg6, reg4, reg5, 0));
    EXPECT(rtl_add_insn(unit, RTLOP_SET_ALIAS, 0, reg6, 0, alias1));
    EXPECT(rtl_add_insn(unit, RTLOP_GOTO, 0, 0, 0, label2));

    int reg7, reg8, reg9, reg10;
    EXPECT(rtl_add_insn(unit, RTLOP_LABEL, 0, 0, 0, label1));
    EXPECT(reg7 = rtl_alloc_register(unit, RTLTYPE_INT32));
    EXPECT(rtl_add_insn(unit, RTLOP_LOAD_IMM, reg7, 0, 0, 6));  // Touch EAX.
    EXPECT(reg8 = rtl_alloc_register(unit, RTLTYPE_INT32));
    EXPECT(rtl_add_insn(unit, RTLOP_GET_ALIAS, reg8, 0, 0, alias1));  // AX->CX
    EXPECT(reg9 = rtl_alloc_register(unit, RTLTYPE_INT32));
    EXPECT(rtl_add_insn(unit, RTLOP_GET_ALIAS, reg9, 0, 0, alias2));  // CX->DX
    EXPECT(reg10 = rtl_alloc_register(unit, RTLTYPE_INT32));
    EXPECT(rtl_add_insn(unit, RTLOP_ADD, reg10, reg8, reg9, 0));
    EXPECT(rtl_add_insn(unit, RTLOP_SET_ALIAS, 0, reg10, 0, alias1));

    EXPECT(rtl_add_insn(unit, RTLOP_NOP, 0, reg1, 0, 0));
    return EXIT_SUCCESS;
}

static const uint8_t expected_code[] = {
    0x48,0x83,0xEC,0x08,                // sub $8,%rsp
    0xB8,0x02,0x00,0x00,0x00,           // mov $2,%eax
    0xB9,0x03,0x00,0x00,0x00,           // mov $3,%ecx
    0x89,0x8F,0x78,0x56,0x00,0x00,      // mov %ecx,0x5678(%rdi)
    0x85,0xC9,                          // test %ecx,%ecx
    0x75,0x09,                          // jnz L2
    0x8B,0xD1,                          // mov %ecx,%edx
    0x8B,0xC8,                          // mov %eax,%ecx
    0xE9,0x09,0x00,0x00,0x00,           // jmp L1
    0xB9,0x05,0x00,0x00,0x00,           // L2: mov $5,%ecx
    0x03,0xC1,                          // add %ecx,%eax
    0xEB,0xF7,                          // jmp L2
    0xB8,0x06,0x00,0x00,0x00,           // L1: mov $6,%eax
    0x03,0xCA,                          // add %edx,%ecx
    0x89,0x8F,0x34,0x12,0x00,0x00,      // mov %ecx,0x1234(%rdi)
    0x48,0x83,0xC4,0x08,                // add $8,%rsp
    0xC3,                               // ret
};

static const char expected_log[] = "";

#include "tests/rtl-translate-test.i"