#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*/ fprintf(int /*<<< orphan*/, char *);
int merge(char *, char *);
int /*<<< orphan*/ printf(char *, char *, char *);
int /*<<< orphan*/ stderr;
int main(int argc, char **argv) {
  if (argc < 3) {
    fprintf(stderr, "Program needs 2 logfile names to merge\n");
    return -1;
  }
  printf("Merging '%s' and '%s'\n", argv[1], argv[2]);
  return merge(argv[1], argv[2]);
}


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   $0x3,-0x8(%rbp)
jge    1171 <main+0x41>
mov    0x2e89(%rip),%rax
mov    (%rax),%edi
lea    0xea0(%rip),%rsi
call   1040 <fprintf@plt>
movl   $0xffffffff,-0x4(%rbp)
jmp    11a5 <main+0x75>
mov    -0x10(%rbp),%rax
mov    0x8(%rax),%rsi
mov    -0x10(%rbp),%rax
mov    0x10(%rax),%rdx
lea    0xea0(%rip),%rdi
call   1030 <printf@plt>
mov    -0x10(%rbp),%rax
mov    0x8(%rax),%rdi
mov    -0x10(%rbp),%rax
mov    0x10(%rax),%rsi
call   1050 <merge@plt>
mov    %eax,-0x4(%rbp)
mov    -0x4(%rbp),%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
cmp    $0x2,%edi
jg     1152 <main+0x22>
mov    0x2ea3(%rip),%rax
mov    (%rax),%edi
lea    0xeba(%rip),%rsi
call   1040 <fprintf@plt>
mov    $0xffffffff,%eax
pop    %rbx
ret
mov    %rsi,%rbx
mov    0x8(%rsi),%rsi
mov    0x10(%rbx),%rdx
lea    0xec4(%rip),%rdi
call   1030 <printf@plt>
mov    0x8(%rbx),%rdi
mov    0x10(%rbx),%rsi
pop    %rbx
jmp    1050 <merge@plt>

LLVM IR (-O0):
@stderr = global i32 0
@.str = [40 x i8] c"Program needs 2 logfile names to merge\0A\00"
@.str.1 = [23 x i8] c"Merging '%s' and '%s'\0A\00"
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, 3
br i1 %7, label %8, label %11
8: ; preds = %2
%9 = load i32, i32* @stderr
%10 = call i32 @fprintf(i32 %9, i8* getelementptr inbounds ([40 x i8], [40 x i8]* @.str, i64 0, i64 0))
store i32 -1, i32* %3
br label %26
11: ; preds = %2
%12 = load i8**, i8*** %5
%13 = getelementptr inbounds i8*, i8** %12, i64 1
%14 = load i8*, i8** %13
%15 = load i8**, i8*** %5
%16 = getelementptr inbounds i8*, i8** %15, i64 2
%17 = load i8*, i8** %16
%18 = call i32 @printf(i8* getelementptr inbounds ([23 x i8], [23 x i8]* @.str.1, i64 0, i64 0), i8* %14, i8* %17)
%19 = load i8**, i8*** %5
%20 = getelementptr inbounds i8*, i8** %19, i64 1
%21 = load i8*, i8** %20
%22 = load i8**, i8*** %5
%23 = getelementptr inbounds i8*, i8** %22, i64 2
%24 = load i8*, i8** %23
%25 = call i32 @merge(i8* %21, i8* %24)
store i32 %25, i32* %3
br label %26
26: ; preds = %11, %8
%27 = load i32, i32* %3
ret i32 %27
}

LLVM IR (-O2):
@stderr = global i32 0
@.str = [40 x i8] c"Program needs 2 logfile names to merge\0A\00"
@.str.1 = [23 x i8] c"Merging '%s' and '%s'\0A\00"
define i32 @main(i32 %0, i8** nocapture %1) {
%3 = icmp slt i32 %0, 3
br i1 %3, label %4, label %7
4: ; preds = %2
%5 = load i32, i32* @stderr
%6 = tail call i32 @fprintf(i32 %5, i8* getelementptr inbounds ([40 x i8], [40 x i8]* @.str, i64 0, i64 0))
br label %16
7: ; preds = %2
%8 = getelementptr inbounds i8*, i8** %1, i64 1
%9 = load i8*, i8** %8
%10 = getelementptr inbounds i8*, i8** %1, i64 2
%11 = load i8*, i8** %10
%12 = tail call i32 @printf(i8* getelementptr inbounds ([23 x i8], [23 x i8]* @.str.1, i64 0, i64 0), i8* %9, i8* %11)
%13 = load i8*, i8** %8
%14 = load i8*, i8** %10
%15 = tail call i32 @merge(i8* %13, i8* %14)
br label %16
16: ; preds = %7, %4
%17 = phi i32 [ -1, %4 ], [ %15, %7 ]
ret i32 %17
}