#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*/ printf(char *);
int /*<<< orphan*/ strcpy(char *, char *);
int main(int argc, char *argv[]) {
  char buffer[64];
  if (argc < 2) {
    printf("syntax error\r\n");
    printf("must supply at-least one argument\r\n");
    return 1;
  }
  strcpy(buffer, argv[1]);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x50,%rsp
movl   $0x0,-0x4(%rbp)
mov    %edi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
cmpl   $0x2,-0x8(%rbp)
jge    1164 <main+0x44>
lea    0xeb9(%rip),%rdi
call   1040 <printf@plt>
lea    0xebc(%rip),%rdi
call   1040 <printf@plt>
movl   $0x1,-0x4(%rbp)
jmp    117c <main+0x5c>
lea    -0x50(%rbp),%rdi
mov    -0x10(%rbp),%rax
mov    0x8(%rax),%rsi
call   1030 <strcpy@plt>
movl   $0x0,-0x4(%rbp)
mov    -0x4(%rbp),%eax
add    $0x50,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
sub    $0x48,%rsp
cmp    $0x1,%edi
jg     114b <main+0x2b>
lea    0xed0(%rip),%rdi
call   1040 <puts@plt>
lea    0xed2(%rip),%rdi
call   1040 <puts@plt>
mov    $0x1,%eax
add    $0x48,%rsp
ret
mov    0x8(%rsi),%rsi
mov    %rsp,%rdi
call   1030 <strcpy@plt>
xor    %eax,%eax
add    $0x48,%rsp
ret

LLVM IR (-O0):
@.str = [15 x i8] c"syntax error\0D\0A\00"
@.str.1 = [36 x i8] c"must supply at-least one argument\0D\0A\00"
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8**
%6 = alloca [64 x i8]
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
%7 = load i32, i32* %4
%8 = icmp slt i32 %7, 2
br i1 %8, label %9, label %12
9: ; preds = %2
%10 = call i32 @printf(i8* getelementptr inbounds ([15 x i8], [15 x i8]* @.str, i64 0, i64 0))
%11 = call i32 @printf(i8* getelementptr inbounds ([36 x i8], [36 x i8]* @.str.1, i64 0, i64 0))
store i32 1, i32* %3
br label %18
12: ; preds = %2
%13 = getelementptr inbounds [64 x i8], [64 x i8]* %6, i64 0, i64 0
%14 = load i8**, i8*** %5
%15 = getelementptr inbounds i8*, i8** %14, i64 1
%16 = load i8*, i8** %15
%17 = call i32 @strcpy(i8* %13, i8* %16)
store i32 0, i32* %3
br label %18
18: ; preds = %12, %9
%19 = load i32, i32* %3
ret i32 %19
}

LLVM IR (-O2):
@str = [14 x i8] c"syntax error\0D\00"
@str.2 = [35 x i8] c"must supply at-least one argument\0D\00"
define i32 @main(i32 %0, i8** nocapture %1) {
%3 = alloca [64 x i8]
%4 = getelementptr inbounds [64 x i8], [64 x i8]* %3, i64 0, i64 0
%5 = icmp slt i32 %0, 2
br i1 %5, label %6, label %9
6: ; preds = %2
%7 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([14 x i8], [14 x i8]* @str, i64 0, i64 0))
%8 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([35 x i8], [35 x i8]* @str.2, i64 0, i64 0))
br label %13
9: ; preds = %2
%10 = getelementptr inbounds i8*, i8** %1, i64 1
%11 = load i8*, i8** %10
%12 = call i32 @strcpy(i8* %4, i8* %11)
br label %13
13: ; preds = %9, %6
%14 = phi i32 [ 1, %6 ], [ 0, %9 ]
ret i32 %14
}