#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 */
int /*<<< orphan*/ copy(char *, char *);
int getline(char *, int);
int /*<<< orphan*/ printf(char *, ...);
int main(void) {
  int len;
  int max;
  char line[1000];
  char longest[1000];
  max = 0;
  while ((len = getline(line, 1000)) > 0) {
    printf("%d: %s", len, line);
    if (len > max) {
      max = len;
      copy(longest, line);
    }
  }
  if (max > 0) {
    printf("Longest is %d characters:\n%s", max, longest);
  }
  printf("\n");
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x7f0,%rsp
movl   $0x0,-0x4(%rbp)
movl   $0x0,-0xc(%rbp)
lea    -0x400(%rbp),%rdi
mov    $0x3e8,%esi
call   1050 <getline@plt>
mov    %eax,-0x8(%rbp)
cmp    $0x0,%eax
jle    11a8 <main+0x78>
mov    -0x8(%rbp),%esi
lea    -0x400(%rbp),%rdx
lea    0xe89(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x8(%rbp),%eax
cmp    -0xc(%rbp),%eax
jle    11a3 <main+0x73>
mov    -0x8(%rbp),%eax
mov    %eax,-0xc(%rbp)
lea    -0x7f0(%rbp),%rdi
lea    -0x400(%rbp),%rsi
call   1040 <copy@plt>
jmp    1149 <main+0x19>
cmpl   $0x0,-0xc(%rbp)
jle    11ca <main+0x9a>
mov    -0xc(%rbp),%esi
lea    -0x7f0(%rbp),%rdx
lea    0xe44(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xe53(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x7f0,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbp
push   %r15
push   %r14
push   %r12
push   %rbx
sub    $0x7e0,%rsp
lea    0x3f0(%rsp),%rdi
mov    $0x3e8,%esi
call   1060 <getline@plt>
test   %eax,%eax
jle    11cc <main+0x8c>
mov    %eax,%ebp
lea    0xe92(%rip),%r14
lea    0x3f0(%rsp),%r15
mov    %rsp,%r12
xor    %ebx,%ebx
jmp    1193 <main+0x53>
nopl   (%rax)
mov    %r15,%rdi
mov    $0x3e8,%esi
call   1060 <getline@plt>
mov    %eax,%ebp
test   %eax,%eax
jle    11b5 <main+0x75>
mov    %r14,%rdi
mov    %ebp,%esi
mov    %r15,%rdx
xor    %eax,%eax
call   1040 <printf@plt>
cmp    %ebx,%ebp
jle    1180 <main+0x40>
mov    %r12,%rdi
mov    %r15,%rsi
call   1050 <copy@plt>
mov    %ebp,%ebx
jmp    1180 <main+0x40>
test   %ebx,%ebx
jle    11cc <main+0x8c>
lea    0xe47(%rip),%rdi
mov    %rsp,%rdx
mov    %ebx,%esi
xor    %eax,%eax
call   1040 <printf@plt>
mov    $0xa,%edi
call   1030 <putchar@plt>
xor    %eax,%eax
add    $0x7e0,%rsp
pop    %rbx
pop    %r12
pop    %r14
pop    %r15
pop    %rbp
ret

LLVM IR (-O0):
@.str = [7 x i8] c"%d: %s\00"
@.str.1 = [29 x i8] c"Longest is %d characters:\0A%s\00"
@.str.2 = [2 x i8] c"\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32
%4 = alloca [1000 x i8]
%5 = alloca [1000 x i8]
store i32 0, i32* %1
store i32 0, i32* %3
br label %6
6: ; preds = %22, %0
%7 = getelementptr inbounds [1000 x i8], [1000 x i8]* %4, i64 0, i64 0
%8 = call i32 @getline(i8* %7, i32 1000)
store i32 %8, i32* %2
%9 = icmp sgt i32 %8, 0
br i1 %9, label %10, label %23
10: ; preds = %6
%11 = load i32, i32* %2
%12 = getelementptr inbounds [1000 x i8], [1000 x i8]* %4, i64 0, i64 0
%13 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str, i64 0, i64 0), i32 %11, i8* %12)
%14 = load i32, i32* %2
%15 = load i32, i32* %3
%16 = icmp sgt i32 %14, %15
br i1 %16, label %17, label %22
17: ; preds = %10
%18 = load i32, i32* %2
store i32 %18, i32* %3
%19 = getelementptr inbounds [1000 x i8], [1000 x i8]* %5, i64 0, i64 0
%20 = getelementptr inbounds [1000 x i8], [1000 x i8]* %4, i64 0, i64 0
%21 = call i32 @copy(i8* %19, i8* %20)
br label %22
22: ; preds = %17, %10
br label %6
23: ; preds = %6
%24 = load i32, i32* %3
%25 = icmp sgt i32 %24, 0
br i1 %25, label %26, label %30
26: ; preds = %23
%27 = load i32, i32* %3
%28 = getelementptr inbounds [1000 x i8], [1000 x i8]* %5, i64 0, i64 0
%29 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([29 x i8], [29 x i8]* @.str.1, i64 0, i64 0), i32 %27, i8* %28)
br label %30
30: ; preds = %26, %23
%31 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.2, i64 0, i64 0))
ret i32 0
}

LLVM IR (-O2):
@.str = [7 x i8] c"%d: %s\00"
@.str.1 = [29 x i8] c"Longest is %d characters:\0A%s\00"
define i32 @main() {
%1 = alloca [1000 x i8]
%2 = alloca [1000 x i8]
%3 = getelementptr inbounds [1000 x i8], [1000 x i8]* %1, i64 0, i64 0
%4 = getelementptr inbounds [1000 x i8], [1000 x i8]* %2, i64 0, i64 0
%5 = call i32 @getline(i8* %3, i32 1000)
%6 = icmp sgt i32 %5, 0
br i1 %6, label %7, label %22
7: ; preds = %0, %14
%8 = phi i32 [ %16, %14 ], [ %5, %0 ]
%9 = phi i32 [ %15, %14 ], [ 0, %0 ]
%10 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([7 x i8], [7 x i8]* @.str, i64 0, i64 0), i32 %8, i8* %3)
%11 = icmp sgt i32 %8, %9
br i1 %11, label %12, label %14
12: ; preds = %7
%13 = call i32 @copy(i8* %4, i8* %3)
br label %14
14: ; preds = %12, %7
%15 = phi i32 [ %8, %12 ], [ %9, %7 ]
%16 = call i32 @getline(i8* %3, i32 1000)
%17 = icmp sgt i32 %16, 0
br i1 %17, label %7, label %18
18: ; preds = %14
%19 = icmp sgt i32 %15, 0
br i1 %19, label %20, label %22
20: ; preds = %18
%21 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([29 x i8], [29 x i8]* @.str.1, i64 0, i64 0), i32 %15, i8* %4)
br label %22
22: ; preds = %0, %20, %18
%23 = call i32 @putchar(i32 10)
ret i32 0
}