#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 */

/* Variables and functions */
scalar_t__ ENOENT;
scalar_t__ asprintf(char **, char *, char *);
int /*<<< orphan*/ err(int, char *, ...);
scalar_t__ errno;
int /*<<< orphan*/ errx(int, char *, ...);
int /*<<< orphan*/ execvp(char *, char **);
int getopt(int, char **, char *);
scalar_t__ isdigit(unsigned char);
char *optarg;
scalar_t__ optind;
scalar_t__ setfib(int);
long strtol(char *, char **, int);
int sysctlbyname(char *, int *, size_t *, int /*<<< orphan*/ *,
                 int /*<<< orphan*/);
int /*<<< orphan*/ usage();
int /*<<< orphan*/ warn(char *);
int main(int argc, char *argv[]) {
  long fib = 0;
  int ch;
  char *ep;
  int numfibs;
  size_t intsize = sizeof(int);
  if (sysctlbyname("net.fibs", &numfibs, &intsize, NULL, 0) == -1)
    errx(1, "Multiple FIBS not supported");
  if (argc < 2)
    usage();
  ep = argv[1];
  if (ep[0] == '-' && isdigit((unsigned char)ep[1]))
    ep++;
  if (isdigit((unsigned char)*ep))
    if (asprintf(&argv[1], "-F%s", ep) < 0)
      err(1, "asprintf");
  while ((ch = getopt(argc, argv, "F:")) != -1) {
    switch (ch) {
    case 'F':
      errno = 0;
      fib = strtol(optarg, &ep, 10);
      if (ep == optarg || *ep != '\0' || errno || fib < 0 || fib >= numfibs)
        errx(1, "%s: invalid FIB (max %d)", optarg, numfibs - 1);
      break;
    default:
      usage();
    }
  }
  argc -= optind;
  argv += optind;
  if (argc == 0)
    usage();
  errno = 0;
  if (setfib((int)fib))
    warn("setfib");
  execvp(*argv, argv);
  err(errno == ENOENT ? 127 : 126, "%s", *argv);
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x40,%rsp
movl   $0x0,-0x4(%rbp)
mov    %edi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
movq   $0x0,-0x18(%rbp)
movq   $0x4,-0x38(%rbp)
lea    0xe23(%rip),%rdi
lea    -0x2c(%rbp),%rsi
lea    -0x38(%rbp),%rdx
xor    %eax,%eax
mov    %eax,%ecx
xor    %r8d,%r8d
call   10c0 <sysctlbyname@plt>
cmp    $0xffffffff,%eax
jne    120d <main+0x5d>
mov    $0x1,%edi
lea    0xe03(%rip),%rsi
mov    $0x0,%al
call   1050 <errx@plt>
cmpl   $0x2,-0x8(%rbp)
jge    121e <main+0x6e>
mov    $0x0,%al
call   1090 <usage@plt>
mov    -0x10(%rbp),%rax
mov    0x8(%rax),%rax
mov    %rax,-0x28(%rbp)
mov    -0x28(%rbp),%rax
movsbl (%rax),%eax
cmp    $0x2d,%eax
jne    125d <main+0xad>
mov    -0x28(%rbp),%rax
movzbl 0x1(%rax),%edi
call   1030 <isdigit@plt>
cmp    $0x0,%rax
je     125d <main+0xad>
mov    -0x28(%rbp),%rax
add    $0x1,%rax
mov    %rax,-0x28(%rbp)
mov    -0x28(%rbp),%rax
movzbl (%rax),%edi
call   1030 <isdigit@plt>
cmp    $0x0,%rax
je     12ad <main+0xfd>
mov    -0x10(%rbp),%rdi
add    $0x8,%rdi
mov    -0x28(%rbp),%rdx
lea    0xd9f(%rip),%rsi
call   1080 <asprintf@plt>
cmp    $0x0,%rax
jge    12a8 <main+0xf8>
mov    $0x1,%edi
lea    0xd89(%rip),%rsi
mov    $0x0,%al
call   1070 <err@plt>
jmp    12ad <main+0xfd>
jmp    12b2 <main+0x102>
mov    -0x8(%rbp),%edi
mov    -0x10(%rbp),%rsi
lea    0xd73(%rip),%rdx
call   10a0 <getopt@plt>
mov    %eax,-0x1c(%rbp)
cmp    $0xffffffff,%eax
je     1391 <main+0x1e1>
mov    -0x1c(%rbp),%eax
sub    $0x46,%eax
jne    1385 <main+0x1d5>
jmp    12e2 <main+0x132>
mov    0x2ce7(%rip),%rax
movq   $0x0,(%rax)
mov    0x2d01(%rip),%rax
mov    (%rax),%rdi
lea    -0x28(%rbp),%rsi
mov    $0xa,%edx
call   1060 <strtol@plt>
mov    %rax,-0x18(%rbp)
mov    -0x28(%rbp),%rax
mov    0x2ce1(%rip),%rcx
cmp    (%rcx),%rax
je     135d <main+0x1ad>
mov    -0x28(%rbp),%rax
movsbl (%rax),%eax
cmp    $0x0,%eax
jne    135d <main+0x1ad>
mov    0x2c99(%rip),%rax
cmpq   $0x0,(%rax)
jne    135d <main+0x1ad>
cmpq   $0x0,-0x18(%rbp)
jl     135d <main+0x1ad>
mov    -0x18(%rbp),%rax
movslq -0x2c(%rbp),%rcx
cmp    %rcx,%rax
jl     1380 <main+0x1d0>
mov    0x2c94(%rip),%rax
mov    (%rax),%rdx
mov    -0x2c(%rbp),%ecx
sub    $0x1,%ecx
mov    $0x1,%edi
lea    0xcbd(%rip),%rsi
mov    $0x0,%al
call   1050 <errx@plt>
jmp    138c <main+0x1dc>
mov    $0x0,%al
call   1090 <usage@plt>
jmp    12b2 <main+0x102>
mov    0x2c48(%rip),%rax
mov    (%rax),%rcx
movslq -0x8(%rbp),%rax
sub    %rcx,%rax
mov    %eax,-0x8(%rbp)
mov    0x2c34(%rip),%rax
mov    (%rax),%rax
shl    $0x3,%rax
add    -0x10(%rbp),%rax
mov    %rax,-0x10(%rbp)
cmpl   $0x0,-0x8(%rbp)
jne    13cc <main+0x21c>
mov    $0x0,%al
call   1090 <usage@plt>
mov    0x2bfd(%rip),%rax
movq   $0x0,(%rax)
mov    -0x18(%rbp),%rax
mov    %eax,%edi
call   10d0 <setfib@plt>
cmp    $0x0,%rax
je     13fb <main+0x24b>
lea    0xc59(%rip),%rdi
call   1040 <warn@plt>
mov    -0x10(%rbp),%rax
mov    (%rax),%rdi
mov    -0x10(%rbp),%rsi
call   10b0 <execvp@plt>
mov    0x2bbe(%rip),%rax
mov    (%rax),%rcx
mov    0x2ba4(%rip),%rax
mov    (%rax),%rdx
mov    $0x7e,%edi
mov    $0x7f,%eax
cmp    %rdx,%rcx
cmove  %eax,%edi
mov    -0x10(%rbp),%rax
mov    (%rax),%rdx
lea    0xbea(%rip),%rsi
mov    $0x0,%al
call   1070 <err@plt>
mov    -0x4(%rbp),%eax
add    $0x40,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbp
push   %r15
push   %r14
push   %r13
push   %r12
push   %rbx
sub    $0x18,%rsp
mov    %rsi,%rbx
mov    %edi,%ebp
movq   $0x4,0x10(%rsp)
lea    0xe2d(%rip),%rdi
lea    0x4(%rsp),%rsi
lea    0x10(%rsp),%rdx
xor    %ecx,%ecx
xor    %r8d,%r8d
call   10c0 <sysctlbyname@plt>
cmp    $0xffffffff,%eax
je     1384 <main+0x1d4>
cmp    $0x1,%ebp
jg     11fc <main+0x4c>
xor    %eax,%eax
call   1090 <usage@plt>
mov    0x8(%rbx),%r14
mov    %r14,0x8(%rsp)
cmpb   $0x2d,(%r14)
jne    1223 <main+0x73>
movzbl 0x1(%r14),%edi
call   1030 <isdigit@plt>
test   %rax,%rax
je     1223 <main+0x73>
add    $0x1,%r14
mov    %r14,0x8(%rsp)
movzbl (%r14),%edi
call   1030 <isdigit@plt>
test   %rax,%rax
je     125c <main+0xac>
lea    0x8(%rbx),%rdi
lea    0xde9(%rip),%rsi
mov    %r14,%rdx
call   1080 <asprintf@plt>
test   %rax,%rax
jns    125c <main+0xac>
lea    0xdda(%rip),%rsi
mov    $0x1,%edi
xor    %eax,%eax
call   1070 <err@plt>
lea    0xdd0(%rip),%r15
mov    0x2d66(%rip),%r13
mov    0x2d87(%rip),%r12
xor    %r14d,%r14d
jmp    1287 <main+0xd7>
cs nopw 0x0(%rax,%rax,1)
xor    %eax,%eax
call   1090 <usage@plt>
mov    %ebp,%edi
mov    %rbx,%rsi
mov    %r15,%rdx
call   10a0 <getopt@plt>
cmp    $0xffffffff,%eax
je     1305 <main+0x155>
cmp    $0x46,%eax
jne    1280 <main+0xd0>
movq   $0x0,0x0(%r13)
mov    (%r12),%rdi
lea    0x8(%rsp),%rsi
mov    $0xa,%edx
call   1060 <strtol@plt>
mov    %rax,%r14
mov    0x8(%rsp),%rax
mov    (%r12),%rdx
cmp    %rdx,%rax
je     12e9 <main+0x139>
cmpb   $0x0,(%rax)
mov    0x4(%rsp),%ecx
jne    12ed <main+0x13d>
cmpq   $0x0,0x0(%r13)
jne    12ed <main+0x13d>
test   %r14,%r14
js     12ed <main+0x13d>
movslq %ecx,%rax
cmp    %rax,%r14
jl     1287 <main+0xd7>
jmp    12ed <main+0x13d>
mov    0x4(%rsp),%ecx
add    $0xffffffff,%ecx
mov    $0x1,%edi
lea    0xd3a(%rip),%rsi
xor    %eax,%eax
call   1050 <errx@plt>
jmp    1287 <main+0xd7>
mov    0x2cd4(%rip),%rax
mov    (%rax),%r15
cmp    %ebp,%r15d
jne    131b <main+0x16b>
xor    %eax,%eax
call   1090 <usage@plt>
lea    (%rbx,%r15,8),%rbx
movq   $0x0,0x0(%r13)
mov    %r14d,%edi
call   10d0 <setfib@plt>
test   %rax,%rax
je     1340 <main+0x190>
lea    0xd14(%rip),%rdi
call   1040 <warn@plt>
mov    (%rbx),%rdi
mov    %rbx,%rsi
call   10b0 <execvp@plt>
mov    0x0(%r13),%rax
mov    0x2c6a(%rip),%rcx
xor    %edi,%edi
cmp    (%rcx),%rax
sete   %dil
or     $0x7e,%edi
mov    (%rbx),%rdx
lea    0xcbb(%rip),%rsi
xor    %eax,%eax
call   1070 <err@plt>
xor    %eax,%eax
add    $0x18,%rsp
pop    %rbx
pop    %r12
pop    %r13
pop    %r14
pop    %r15
pop    %rbp
ret
lea    0xc7e(%rip),%rsi
mov    $0x1,%edi
xor    %eax,%eax
call   1050 <errx@plt>
cmp    $0x1,%ebp
jle    11f5 <main+0x45>
jmp    11fc <main+0x4c>

LLVM IR (-O0):
@.str = [9 x i8] c"net.fibs\00"
@.str.1 = [28 x i8] c"Multiple FIBS not supported\00"
@.str.2 = [5 x i8] c"-F%s\00"
@.str.3 = [9 x i8] c"asprintf\00"
@.str.4 = [3 x i8] c"F:\00"
@errno = global i64 0
@optarg = global i8* null
@.str.5 = [25 x i8] c"%s: invalid FIB (max %d)\00"
@optind = global i64 0
@.str.6 = [7 x i8] c"setfib\00"
@ENOENT = global i64 0
@.str.7 = [3 x i8] c"%s\00"
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8**
%6 = alloca i64
%7 = alloca i32
%8 = alloca i8*
%9 = alloca i32
%10 = alloca i64
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
store i64 0, i64* %6
store i64 4, i64* %10
%11 = call i32 @sysctlbyname(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str, i64 0, i64 0), i32* %9, i64* %10, i32* null, i32 0)
%12 = icmp eq i32 %11, -1
br i1 %12, label %13, label %15
13: ; preds = %2
%14 = call i32 (i32, i8*, ...) @errx(i32 1, i8* getelementptr inbounds ([28 x i8], [28 x i8]* @.str.1, i64 0, i64 0))
br label %15
15: ; preds = %13, %2
%16 = load i32, i32* %4
%17 = icmp slt i32 %16, 2
br i1 %17, label %18, label %20
18: ; preds = %15
%19 = call i32 (...) @usage()
br label %20
20: ; preds = %18, %15
%21 = load i8**, i8*** %5
%22 = getelementptr inbounds i8*, i8** %21, i64 1
%23 = load i8*, i8** %22
store i8* %23, i8** %8
%24 = load i8*, i8** %8
%25 = getelementptr inbounds i8, i8* %24, i64 0
%26 = load i8, i8* %25
%27 = sext i8 %26 to i32
%28 = icmp eq i32 %27, 45
br i1 %28, label %29, label %38
29: ; preds = %20
%30 = load i8*, i8** %8
%31 = getelementptr inbounds i8, i8* %30, i64 1
%32 = load i8, i8* %31
%33 = call i64 @isdigit(i8 zeroext %32)
%34 = icmp ne i64 %33, 0
br i1 %34, label %35, label %38
35: ; preds = %29
%36 = load i8*, i8** %8
%37 = getelementptr inbounds i8, i8* %36, i32 1
store i8* %37, i8** %8
br label %38
38: ; preds = %35, %29, %20
%39 = load i8*, i8** %8
%40 = load i8, i8* %39
%41 = call i64 @isdigit(i8 zeroext %40)
%42 = icmp ne i64 %41, 0
br i1 %42, label %43, label %52
43: ; preds = %38
%44 = load i8**, i8*** %5
%45 = getelementptr inbounds i8*, i8** %44, i64 1
%46 = load i8*, i8** %8
%47 = call i64 @asprintf(i8** %45, i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.2, i64 0, i64 0), i8* %46)
%48 = icmp slt i64 %47, 0
br i1 %48, label %49, label %51
49: ; preds = %43
%50 = call i32 (i32, i8*, ...) @err(i32 1, i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.3, i64 0, i64 0))
br label %51
51: ; preds = %49, %43
br label %52
52: ; preds = %51, %38
br label %53
53: ; preds = %90, %52
%54 = load i32, i32* %4
%55 = load i8**, i8*** %5
%56 = call i32 @getopt(i32 %54, i8** %55, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.4, i64 0, i64 0))
store i32 %56, i32* %7
%57 = icmp ne i32 %56, -1
br i1 %57, label %58, label %91
58: ; preds = %53
%59 = load i32, i32* %7
switch i32 %59, label %88 [
i32 70, label %60
]
60: ; preds = %58
store i64 0, i64* @errno
%61 = load i8*, i8** @optarg
%62 = call i64 @strtol(i8* %61, i8** %8, i32 10)
store i64 %62, i64* %6
%63 = load i8*, i8** %8
%64 = load i8*, i8** @optarg
%65 = icmp eq i8* %63, %64
br i1 %65, label %82, label %66
66: ; preds = %60
%67 = load i8*, i8** %8
%68 = load i8, i8* %67
%69 = sext i8 %68 to i32
%70 = icmp ne i32 %69, 0
br i1 %70, label %82, label %71
71: ; preds = %66
%72 = load i64, i64* @errno
%73 = icmp ne i64 %72, 0
br i1 %73, label %82, label %74
74: ; preds = %71
%75 = load i64, i64* %6
%76 = icmp slt i64 %75, 0
br i1 %76, label %82, label %77
77: ; preds = %74
%78 = load i64, i64* %6
%79 = load i32, i32* %9
%80 = sext i32 %79 to i64
%81 = icmp sge i64 %78, %80
br i1 %81, label %82, label %87
82: ; preds = %77, %74, %71, %66, %60
%83 = load i8*, i8** @optarg
%84 = load i32, i32* %9
%85 = sub nsw i32 %84, 1
%86 = call i32 (i32, i8*, ...) @errx(i32 1, i8* getelementptr inbounds ([25 x i8], [25 x i8]* @.str.5, i64 0, i64 0), i8* %83, i32 %85)
br label %87
87: ; preds = %82, %77
br label %90
88: ; preds = %58
%89 = call i32 (...) @usage()
br label %90
90: ; preds = %88, %87
br label %53
91: ; preds = %53
%92 = load i64, i64* @optind
%93 = load i32, i32* %4
%94 = sext i32 %93 to i64
%95 = sub nsw i64 %94, %92
%96 = trunc i64 %95 to i32
store i32 %96, i32* %4
%97 = load i64, i64* @optind
%98 = load i8**, i8*** %5
%99 = getelementptr inbounds i8*, i8** %98, i64 %97
store i8** %99, i8*** %5
%100 = load i32, i32* %4
%101 = icmp eq i32 %100, 0
br i1 %101, label %102, label %104
102: ; preds = %91
%103 = call i32 (...) @usage()
br label %104
104: ; preds = %102, %91
store i64 0, i64* @errno
%105 = load i64, i64* %6
%106 = trunc i64 %105 to i32
%107 = call i64 @setfib(i32 %106)
%108 = icmp ne i64 %107, 0
br i1 %108, label %109, label %111
109: ; preds = %104
%110 = call i32 @warn(i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.6, i64 0, i64 0))
br label %111
111: ; preds = %109, %104
%112 = load i8**, i8*** %5
%113 = load i8*, i8** %112
%114 = load i8**, i8*** %5
%115 = call i32 @execvp(i8* %113, i8** %114)
%116 = load i64, i64* @errno
%117 = load i64, i64* @ENOENT
%118 = icmp eq i64 %116, %117
%119 = zext i1 %118 to i64
%120 = select i1 %118, i32 127, i32 126
%121 = load i8**, i8*** %5
%122 = load i8*, i8** %121
%123 = call i32 (i32, i8*, ...) @err(i32 %120, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.7, i64 0, i64 0), i8* %122)
%124 = load i32, i32* %3
ret i32 %124
}

LLVM IR (-O2):
@.str = [9 x i8] c"net.fibs\00"
@.str.1 = [28 x i8] c"Multiple FIBS not supported\00"
@.str.2 = [5 x i8] c"-F%s\00"
@.str.3 = [9 x i8] c"asprintf\00"
@.str.4 = [3 x i8] c"F:\00"
@errno = global i64 0
@optarg = global i8* null
@.str.5 = [25 x i8] c"%s: invalid FIB (max %d)\00"
@optind = global i64 0
@.str.6 = [7 x i8] c"setfib\00"
@ENOENT = global i64 0
@.str.7 = [3 x i8] c"%s\00"
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i8*
%4 = alloca i32
%5 = alloca i64
%6 = bitcast i8** %3 to i8*
%7 = bitcast i32* %4 to i8*
%8 = bitcast i64* %5 to i8*
store i64 4, i64* %5
%9 = call i32 @sysctlbyname(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str, i64 0, i64 0), i32* %4, i64* %5, i32* null, i32 0)
%10 = icmp eq i32 %9, -1
br i1 %10, label %11, label %13
11: ; preds = %2
%12 = call i32 (i32, i8*, ...) @errx(i32 1, i8* getelementptr inbounds ([28 x i8], [28 x i8]* @.str.1, i64 0, i64 0))
br label %13
13: ; preds = %11, %2
%14 = icmp slt i32 %0, 2
br i1 %14, label %15, label %17
15: ; preds = %13
%16 = call i32 (...) @usage()
br label %17
17: ; preds = %15, %13
%18 = getelementptr inbounds i8*, i8** %1, i64 1
%19 = load i8*, i8** %18
store i8* %19, i8** %3
%20 = load i8, i8* %19
%21 = icmp eq i8 %20, 45
br i1 %21, label %22, label %28
22: ; preds = %17
%23 = getelementptr inbounds i8, i8* %19, i64 1
%24 = load i8, i8* %23
%25 = call i64 @isdigit(i8 zeroext %24)
%26 = icmp eq i64 %25, 0
br i1 %26, label %28, label %27
27: ; preds = %22
store i8* %23, i8** %3
br label %28
28: ; preds = %27, %22, %17
%29 = phi i8* [ %23, %27 ], [ %19, %22 ], [ %19, %17 ]
%30 = load i8, i8* %29
%31 = call i64 @isdigit(i8 zeroext %30)
%32 = icmp eq i64 %31, 0
br i1 %32, label %38, label %33
33: ; preds = %28
%34 = call i64 @asprintf(i8** %18, i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.2, i64 0, i64 0), i8* %29)
%35 = icmp slt i64 %34, 0
br i1 %35, label %36, label %38
36: ; preds = %33
%37 = call i32 (i32, i8*, ...) @err(i32 1, i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.3, i64 0, i64 0))
br label %38
38: ; preds = %33, %36, %28
br label %39
39: ; preds = %67, %38
%40 = phi i32 [ 0, %38 ], [ %68, %67 ]
br label %41
41: ; preds = %39, %69
%42 = call i32 @getopt(i32 %0, i8** %1, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.4, i64 0, i64 0))
switch i32 %42, label %69 [
i32 -1, label %71
i32 70, label %43
]
43: ; preds = %41
store i64 0, i64* @errno
%44 = load i8*, i8** @optarg
%45 = call i64 @strtol(i8* %44, i8** %3, i32 10)
%46 = load i8*, i8** %3
%47 = load i8*, i8** @optarg
%48 = icmp eq i8* %46, %47
br i1 %48, label %49, label %51
49: ; preds = %43
%50 = load i32, i32* %4
br label %63
51: ; preds = %43
%52 = load i8, i8* %46
%53 = icmp eq i8 %52, 0
%54 = load i64, i64* @errno
%55 = icmp eq i64 %54, 0
%56 = select i1 %53, i1 %55, i1 false
%57 = icmp sgt i64 %45, -1
%58 = select i1 %56, i1 %57, i1 false
%59 = load i32, i32* %4
%60 = sext i32 %59 to i64
%61 = icmp slt i64 %45, %60
%62 = select i1 %58, i1 %61, i1 false
br i1 %62, label %67, label %63
63: ; preds = %49, %51
%64 = phi i32 [ %50, %49 ], [ %59, %51 ]
%65 = add nsw i32 %64, -1
%66 = call i32 (i32, i8*, ...) @errx(i32 1, i8* getelementptr inbounds ([25 x i8], [25 x i8]* @.str.5, i64 0, i64 0), i8* %47, i32 %65)
br label %67
67: ; preds = %63, %51
%68 = trunc i64 %45 to i32
br label %39
69: ; preds = %41
%70 = call i32 (...) @usage()
br label %41
71: ; preds = %41
%72 = load i64, i64* @optind
%73 = trunc i64 %72 to i32
%74 = getelementptr inbounds i8*, i8** %1, i64 %72
%75 = icmp eq i32 %73, %0
br i1 %75, label %76, label %78
76: ; preds = %71
%77 = call i32 (...) @usage()
br label %78
78: ; preds = %76, %71
store i64 0, i64* @errno
%79 = call i64 @setfib(i32 %40)
%80 = icmp eq i64 %79, 0
br i1 %80, label %83, label %81
81: ; preds = %78
%82 = call i32 @warn(i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.6, i64 0, i64 0))
br label %83
83: ; preds = %81, %78
%84 = load i8*, i8** %74
%85 = call i32 @execvp(i8* %84, i8** %74)
%86 = load i64, i64* @errno
%87 = load i64, i64* @ENOENT
%88 = icmp eq i64 %86, %87
%89 = select i1 %88, i32 127, i32 126
%90 = load i8*, i8** %74
%91 = call i32 (i32, i8*, ...) @err(i32 %89, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.7, i64 0, i64 0), i8* %90)
ret i32 0
}