#define NULL ((void *)0)
typedef unsigned long size_t; // Customize by platform.
typedef long intptr_t;
typedef unsigned long uintptr_t;
typedef long scalar_t__; // Either arithmetic or pointer type.
/* By default, we understand bool (as a convenience). */
typedef int bool;
#define false 0
#define true 1

/* Forward declarations */

/* Type definitions */
typedef int /*<<< orphan*/ BN_CTX;
typedef int /*<<< orphan*/ BIGNUM;

/* Variables and functions */
int /*<<< orphan*/ BN_CTX_end(int /*<<< orphan*/ *);
int /*<<< orphan*/ *BN_CTX_get(int /*<<< orphan*/ *);
int /*<<< orphan*/ BN_CTX_start(int /*<<< orphan*/ *);
int BN_num_bits(int /*<<< orphan*/ *);
int /*<<< orphan*/ BN_rand(int /*<<< orphan*/ *, int, int, int /*<<< orphan*/);
int /*<<< orphan*/ BN_sub(int /*<<< orphan*/ *, int /*<<< orphan*/ *,
                          int /*<<< orphan*/ *);
int BN_X931_generate_Xpq(BIGNUM *Xp, BIGNUM *Xq, int nbits, BN_CTX *ctx) {
  BIGNUM *t;
  int i;
  if ((nbits < 1024) || (nbits & 0xff))
    return 0;
  nbits >>= 1;
  if (!BN_rand(Xp, nbits, 1, 0))
    goto err;
  BN_CTX_start(ctx);
  t = BN_CTX_get(ctx);
  if (t == NULL)
    goto err;
  for (i = 0; i < 1000; i++) {
    if (!BN_rand(Xq, nbits, 1, 0))
      goto err;
    if (!BN_sub(t, Xp, Xq))
      goto err;
    if (BN_num_bits(t) > (nbits - 100))
      break;
  }
  BN_CTX_end(ctx);
  if (i < 1000)
    return 1;
  return 0;
err:
  BN_CTX_end(ctx);
  return 0;
}


x86 assembly (clang, -O0):
<BN_X931_generate_Xpq>:
push   %rbp
mov    %rsp,%rbp
sub    $0x40,%rsp
mov    %rdi,-0x10(%rbp)
mov    %rsi,-0x18(%rbp)
mov    %edx,-0x1c(%rbp)
mov    %rcx,-0x28(%rbp)
cmpl   $0x400,-0x1c(%rbp)
jl     1195 <BN_X931_generate_Xpq+0x35>
mov    -0x1c(%rbp),%eax
and    $0xff,%eax
cmp    $0x0,%eax
je     11a1 <BN_X931_generate_Xpq+0x41>
movl   $0x0,-0x4(%rbp)
jmp    12b2 <BN_X931_generate_Xpq+0x152>
mov    -0x1c(%rbp),%eax
sar    $0x1,%eax
mov    %eax,-0x1c(%rbp)
mov    -0x10(%rbp),%rdi
mov    -0x1c(%rbp),%esi
mov    $0x1,%edx
xor    %ecx,%ecx
call   1030 <BN_rand@plt>
cmp    $0x0,%eax
jne    11cb <BN_X931_generate_Xpq+0x6b>
jmp    12a2 <BN_X931_generate_Xpq+0x142>
mov    -0x28(%rbp),%rdi
call   1080 <BN_CTX_start@plt>
mov    -0x28(%rbp),%rdi
call   1040 <BN_CTX_get@plt>
mov    %rax,-0x30(%rbp)
cmpq   $0x0,-0x30(%rbp)
jne    11f1 <BN_X931_generate_Xpq+0x91>
jmp    12a2 <BN_X931_generate_Xpq+0x142>
movl   $0x0,-0x34(%rbp)
cmpl   $0x3e8,-0x34(%rbp)
jge    1274 <BN_X931_generate_Xpq+0x114>
mov    -0x18(%rbp),%rdi
mov    -0x1c(%rbp),%esi
mov    $0x1,%edx
xor    %ecx,%ecx
call   1030 <BN_rand@plt>
cmp    $0x0,%eax
jne    1226 <BN_X931_generate_Xpq+0xc6>
jmp    12a2 <BN_X931_generate_Xpq+0x142>
mov    -0x30(%rbp),%rdi
mov    -0x10(%rbp),%rsi
mov    -0x18(%rbp),%rdx
call   1060 <BN_sub@plt>
cmp    $0x0,%eax
jne    1245 <BN_X931_generate_Xpq+0xe5>
jmp    12a2 <BN_X931_generate_Xpq+0x142>
mov    -0x30(%rbp),%rdi
call   1050 <BN_num_bits@plt>
mov    -0x1c(%rbp),%ecx
sub    $0x64,%ecx
cmp    %ecx,%eax
jle    1261 <BN_X931_generate_Xpq+0x101>
jmp    1274 <BN_X931_generate_Xpq+0x114>
jmp    1266 <BN_X931_generate_Xpq+0x106>
mov    -0x34(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x34(%rbp)
jmp    11f8 <BN_X931_generate_Xpq+0x98>
mov    -0x28(%rbp),%rdi
call   1070 <BN_CTX_end@plt>
cmpl   $0x3e8,-0x34(%rbp)
jge    1296 <BN_X931_generate_Xpq+0x136>
movl   $0x1,-0x4(%rbp)
jmp    12b2 <BN_X931_generate_Xpq+0x152>
movl   $0x0,-0x4(%rbp)
jmp    12b2 <BN_X931_generate_Xpq+0x152>
mov    -0x28(%rbp),%rdi
call   1070 <BN_CTX_end@plt>
movl   $0x0,-0x4(%rbp)
mov    -0x4(%rbp),%eax
add    $0x40,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<BN_X931_generate_Xpq>:
push   %rbp
push   %r15
push   %r14
push   %r13
push   %r12
push   %rbx
sub    $0x18,%rsp
xor    %eax,%eax
cmp    $0x400,%edx
jl     124d <BN_X931_generate_Xpq+0xed>
mov    %edx,%ebx
movzbl %bl,%edx
test   %edx,%edx
jne    124d <BN_X931_generate_Xpq+0xed>
mov    %rsi,%r13
mov    %rdi,%r12
mov    %rcx,0x8(%rsp)
shr    %ebx
mov    %ebx,%esi
mov    $0x1,%edx
xor    %ecx,%ecx
call   1030 <BN_rand@plt>
test   %eax,%eax
je     1241 <BN_X931_generate_Xpq+0xe1>
mov    0x8(%rsp),%rbp
mov    %rbp,%rdi
call   1080 <BN_CTX_start@plt>
mov    %rbp,%rdi
call   1040 <BN_CTX_get@plt>
test   %rax,%rax
je     1241 <BN_X931_generate_Xpq+0xe1>
mov    %rax,%rbp
lea    -0x64(%rbx),%eax
mov    %eax,0x14(%rsp)
xor    %r14d,%r14d
mov    $0x1,%r15b
cs nopw 0x0(%rax,%rax,1)
mov    %r13,%rdi
mov    %ebx,%esi
mov    $0x1,%edx
xor    %ecx,%ecx
call   1030 <BN_rand@plt>
test   %eax,%eax
je     1241 <BN_X931_generate_Xpq+0xe1>
mov    %rbp,%rdi
mov    %r12,%rsi
mov    %r13,%rdx
call   1060 <BN_sub@plt>
test   %eax,%eax
je     1241 <BN_X931_generate_Xpq+0xe1>
mov    %rbp,%rdi
call   1050 <BN_num_bits@plt>
cmp    0x14(%rsp),%eax
jg     122e <BN_X931_generate_Xpq+0xce>
cmp    $0x3e7,%r14d
lea    0x1(%r14),%eax
setb   %r15b
mov    %eax,%r14d
cmp    $0x3e8,%eax
jne    11e0 <BN_X931_generate_Xpq+0x80>
mov    0x8(%rsp),%rdi
call   1070 <BN_CTX_end@plt>
movzbl %r15b,%eax
and    $0x1,%eax
jmp    124d <BN_X931_generate_Xpq+0xed>
mov    0x8(%rsp),%rdi
call   1070 <BN_CTX_end@plt>
xor    %eax,%eax
add    $0x18,%rsp
pop    %rbx
pop    %r12
pop    %r13
pop    %r14
pop    %r15
pop    %rbp
ret

LLVM IR (-O0):
define i32 @BN_X931_generate_Xpq(i32* %0, i32* %1, i32 %2, i32* %3) {
%5 = alloca i32
%6 = alloca i32*
%7 = alloca i32*
%8 = alloca i32
%9 = alloca i32*
%10 = alloca i32*
%11 = alloca i32
store i32* %0, i32** %6
store i32* %1, i32** %7
store i32 %2, i32* %8
store i32* %3, i32** %9
%12 = load i32, i32* %8
%13 = icmp slt i32 %12, 1024
br i1 %13, label %18, label %14
14: ; preds = %4
%15 = load i32, i32* %8
%16 = and i32 %15, 255
%17 = icmp ne i32 %16, 0
br i1 %17, label %18, label %19
18: ; preds = %14, %4
store i32 0, i32* %5
br label %73
19: ; preds = %14
%20 = load i32, i32* %8
%21 = ashr i32 %20, 1
store i32 %21, i32* %8
%22 = load i32*, i32** %6
%23 = load i32, i32* %8
%24 = call i32 @BN_rand(i32* %22, i32 %23, i32 1, i32 0)
%25 = icmp ne i32 %24, 0
br i1 %25, label %27, label %26
26: ; preds = %19
br label %70
27: ; preds = %19
%28 = load i32*, i32** %9
%29 = call i32 @BN_CTX_start(i32* %28)
%30 = load i32*, i32** %9
%31 = call i32* @BN_CTX_get(i32* %30)
store i32* %31, i32** %10
%32 = load i32*, i32** %10
%33 = icmp eq i32* %32, null
br i1 %33, label %34, label %35
34: ; preds = %27
br label %70
35: ; preds = %27
store i32 0, i32* %11
br label %36
36: ; preds = %60, %35
%37 = load i32, i32* %11
%38 = icmp slt i32 %37, 1000
br i1 %38, label %39, label %63
39: ; preds = %36
%40 = load i32*, i32** %7
%41 = load i32, i32* %8
%42 = call i32 @BN_rand(i32* %40, i32 %41, i32 1, i32 0)
%43 = icmp ne i32 %42, 0
br i1 %43, label %45, label %44
44: ; preds = %39
br label %70
45: ; preds = %39
%46 = load i32*, i32** %10
%47 = load i32*, i32** %6
%48 = load i32*, i32** %7
%49 = call i32 @BN_sub(i32* %46, i32* %47, i32* %48)
%50 = icmp ne i32 %49, 0
br i1 %50, label %52, label %51
51: ; preds = %45
br label %70
52: ; preds = %45
%53 = load i32*, i32** %10
%54 = call i32 @BN_num_bits(i32* %53)
%55 = load i32, i32* %8
%56 = sub nsw i32 %55, 100
%57 = icmp sgt i32 %54, %56
br i1 %57, label %58, label %59
58: ; preds = %52
br label %63
59: ; preds = %52
br label %60
60: ; preds = %59
%61 = load i32, i32* %11
%62 = add nsw i32 %61, 1
store i32 %62, i32* %11
br label %36
63: ; preds = %58, %36
%64 = load i32*, i32** %9
%65 = call i32 @BN_CTX_end(i32* %64)
%66 = load i32, i32* %11
%67 = icmp slt i32 %66, 1000
br i1 %67, label %68, label %69
68: ; preds = %63
store i32 1, i32* %5
br label %73
69: ; preds = %63
store i32 0, i32* %5
br label %73
70: ; preds = %51, %44, %34, %26
%71 = load i32*, i32** %9
%72 = call i32 @BN_CTX_end(i32* %71)
store i32 0, i32* %5
br label %73
73: ; preds = %70, %69, %68, %18
%74 = load i32, i32* %5
ret i32 %74
}

LLVM IR (-O2):
define i32 @BN_X931_generate_Xpq(i32* %0, i32* %1, i32 %2, i32* %3) {
%5 = icmp sgt i32 %2, 1023
%6 = and i32 %2, 255
%7 = icmp eq i32 %6, 0
%8 = and i1 %5, %7
br i1 %8, label %9, label %40
9: ; preds = %4
%10 = lshr i32 %2, 1
%11 = tail call i32 @BN_rand(i32* %0, i32 %10, i32 1, i32 0)
%12 = icmp eq i32 %11, 0
br i1 %12, label %38, label %13
13: ; preds = %9
%14 = tail call i32 @BN_CTX_start(i32* %3)
%15 = tail call i32* @BN_CTX_get(i32* %3)
%16 = icmp eq i32* %15, null
br i1 %16, label %38, label %17
17: ; preds = %13
%18 = add nsw i32 %10, -100
br label %23
19: ; preds = %31
%20 = add nuw nsw i32 %25, 1
%21 = icmp ult i32 %25, 999
%22 = icmp eq i32 %20, 1000
br i1 %22, label %34, label %23
23: ; preds = %17, %19
%24 = phi i1 [ true, %17 ], [ %21, %19 ]
%25 = phi i32 [ 0, %17 ], [ %20, %19 ]
%26 = tail call i32 @BN_rand(i32* %1, i32 %10, i32 1, i32 0)
%27 = icmp eq i32 %26, 0
br i1 %27, label %38, label %28
28: ; preds = %23
%29 = tail call i32 @BN_sub(i32* %15, i32* %0, i32* %1)
%30 = icmp eq i32 %29, 0
br i1 %30, label %38, label %31
31: ; preds = %28
%32 = tail call i32 @BN_num_bits(i32* %15)
%33 = icmp sgt i32 %32, %18
br i1 %33, label %34, label %19
34: ; preds = %31, %19
%35 = phi i1 [ %24, %31 ], [ %21, %19 ]
%36 = tail call i32 @BN_CTX_end(i32* %3)
%37 = zext i1 %35 to i32
br label %40
38: ; preds = %28, %23, %13, %9
%39 = tail call i32 @BN_CTX_end(i32* %3)
br label %40
40: ; preds = %34, %4, %38
%41 = phi i32 [ 0, %38 ], [ 0, %4 ], [ %37, %34 ]
ret i32 %41
}