#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*/ exit(int);
int /*<<< orphan*/ fprintf(int /*<<< orphan*/, char *, char *);
int /*<<< orphan*/ populate_edges(int /*<<< orphan*/);
int /*<<< orphan*/ populate_graph();
int /*<<< orphan*/ stderr;
int /*<<< orphan*/ stdin;
int /*<<< orphan*/ write_graph(int /*<<< orphan*/, char *);
int main(int argc, char *argv[]) {
  if (argc < 2) {
    fprintf(stderr, "Usage: %s foo.g < edgelist\n", argv[0]);
    exit(3);
  }
  populate_edges(stdin);
  write_graph(populate_graph(), argv[1]);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
mov    %edi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
cmpl   $0x2,-0x8(%rbp)
jge    1196 <main+0x46>
mov    0x2e61(%rip),%rax
mov    (%rax),%edi
mov    -0x10(%rbp),%rax
mov    (%rax),%rdx
lea    0xe79(%rip),%rsi
call   1040 <fprintf@plt>
mov    $0x3,%edi
call   1060 <exit@plt>
mov    0x2e4b(%rip),%rax
mov    (%rax),%edi
call   1070 <populate_edges@plt>
mov    $0x0,%al
call   1030 <populate_graph@plt>
mov    %eax,%edi
mov    -0x10(%rbp),%rax
mov    0x8(%rax),%rsi
call   1050 <write_graph@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
mov    %rsi,%rbx
cmp    $0x1,%edi
jle    117d <main+0x2d>
mov    0x2e88(%rip),%rax
mov    (%rax),%edi
call   1070 <populate_edges@plt>
xor    %eax,%eax
call   1030 <populate_graph@plt>
mov    0x8(%rbx),%rsi
mov    %eax,%edi
call   1050 <write_graph@plt>
xor    %eax,%eax
pop    %rbx
ret
mov    0x2e54(%rip),%rax
mov    (%rax),%edi
mov    (%rbx),%rdx
lea    0xe70(%rip),%rsi
call   1040 <fprintf@plt>
mov    $0x3,%edi
call   1060 <exit@plt>

LLVM IR (-O0):
@stderr = global i32 0
@.str = [28 x i8] c"Usage: %s foo.g < edgelist\0A\00"
@stdin = global i32 0
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8**
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
%6 = load i32, i32* %4
%7 = icmp slt i32 %6, 2
br i1 %7, label %8, label %15
8: ; preds = %2
%9 = load i32, i32* @stderr
%10 = load i8**, i8*** %5
%11 = getelementptr inbounds i8*, i8** %10, i64 0
%12 = load i8*, i8** %11
%13 = call i32 @fprintf(i32 %9, i8* getelementptr inbounds ([28 x i8], [28 x i8]* @.str, i64 0, i64 0), i8* %12)
%14 = call i32 @exit(i32 3)
unreachable
15: ; preds = %2
%16 = load i32, i32* @stdin
%17 = call i32 @populate_edges(i32 %16)
%18 = call i32 (...) @populate_graph()
%19 = load i8**, i8*** %5
%20 = getelementptr inbounds i8*, i8** %19, i64 1
%21 = load i8*, i8** %20
%22 = call i32 @write_graph(i32 %18, i8* %21)
ret i32 0
}

LLVM IR (-O2):
@stderr = global i32 0
@.str = [28 x i8] c"Usage: %s foo.g < edgelist\0A\00"
@stdin = global i32 0
define i32 @main(i32 %0, i8** nocapture %1) {
%3 = icmp slt i32 %0, 2
br i1 %3, label %4, label %9
4: ; preds = %2
%5 = load i32, i32* @stderr
%6 = load i8*, i8** %1
%7 = tail call i32 @fprintf(i32 %5, i8* getelementptr inbounds ([28 x i8], [28 x i8]* @.str, i64 0, i64 0), i8* %6)
%8 = tail call i32 @exit(i32 3)
unreachable
9: ; preds = %2
%10 = load i32, i32* @stdin
%11 = tail call i32 @populate_edges(i32 %10)
%12 = tail call i32 (...) @populate_graph()
%13 = getelementptr inbounds i8*, i8** %1, i64 1
%14 = load i8*, i8** %13
%15 = tail call i32 @write_graph(i32 %12, i8* %14)
ret i32 0
}