/*
 * 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 = BINREC_OPT_H_X86_MERGE_REGS;

static int add_rtl(RTLUnit *unit)
{
    alloc_dummy_registers(unit, 5, RTLTYPE_INT32);

    int reg1, alias;
    EXPECT(alias = rtl_alloc_alias_register(unit, RTLTYPE_INT32));
    EXPECT(reg1 = rtl_alloc_register(unit, RTLTYPE_INT32));
    EXPECT(rtl_add_insn(unit, RTLOP_LOAD_IMM, reg1, 0, 0, 1));
    EXPECT(rtl_add_insn(unit, RTLOP_SET_ALIAS, 0, reg1, 0, alias));

    int reg2, reg3, label;
    EXPECT(label = rtl_alloc_label(unit));
    EXPECT(rtl_add_insn(unit, RTLOP_LABEL, 0, 0, 0, label));
    EXPECT(reg2 = rtl_alloc_register(unit, RTLTYPE_ADDRESS));
    EXPECT(rtl_add_insn(unit, RTLOP_LOAD_IMM, reg2, 0, 0, 2));
    rtl_make_unfoldable(unit, reg2);
    /* This call should preserve reg1 (in EAX) since it's scheduled for a
     * merge, even though the merge will fail. */
    EXPECT(rtl_add_insn(unit, RTLOP_CALL, 0, reg2, 0, 0));
    EXPECT(reg3 = rtl_alloc_register(unit, RTLTYPE_INT32));
    /* reg3 should fail to be merged with reg1 because all callee-saved
     * registers are in use and all caller-saved registers are touched by
     * the CALL instruction.  This results in suboptimal code since the
     * save of EAX around the CALL is now unnecessary, but we assume cases
     * like this will be uncommon. */
    EXPECT(rtl_add_insn(unit, RTLOP_GET_ALIAS, reg3, 0, 0, alias));
    EXPECT(rtl_add_insn(unit, RTLOP_SET_ALIAS, 0, reg3, 0, alias));

    return EXIT_SUCCESS;
}

static const uint8_t expected_code[] = {
    0x53,                               // push %rbx
    0x55,                               // push %rbp
    0x41,0x54,                          // push %r12
    0x41,0x55,                          // push %r13
    0x41,0x56,                          // push %r14
    0x48,0x83,0xEC,0x20,                // sub $32,%rsp
    0xB8,0x01,0x00,0x00,0x00,           // mov $1,%eax
    0x89,0x04,0x24,                     // mov %eax,(%rsp)
    0xB9,0x02,0x00,0x00,0x00,           // mov $2,%ecx
    0x48,0x89,0x44,0x24,0x08,           // mov %rax,8(%rsp)
    0x0F,0xAE,0x5C,0x24,0x10,           // stmxcsr 16(%rsp)
    0xFF,0xD1,                          // call *%rcx
    0x0F,0xAE,0x54,0x24,0x10,           // ldmxcsr 16(%rsp)
    0x48,0x8B,0x44,0x24,0x08,           // mov 8(%rsp),%rax
    0x8B,0x04,0x24,                     // mov (%rsp),%eax
    0x89,0x04,0x24,                     // mov %eax,(%rsp)
    0x48,0x83,0xC4,0x20,                // add $32,%rsp
    0x41,0x5E,                          // pop %r14
    0x41,0x5D,                          // pop %r13
    0x41,0x5C,                          // pop %r12
    0x5D,                               // pop %rbp
    0x5B,                               // pop %rbx
    0xC3,                               // ret
};

static const char expected_log[] = "";

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