#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*/ free(char *);
char *multiply(char *, char *);
int /*<<< orphan*/ printf(char *, ...);
int main(int argc, char **argv) {
  if (argc < 3) {
    printf("multiply <number1> <number2>\n");
    return 0;
  }
  char *sp = multiply(argv[1], argv[2]);
  printf("Product: %s\n", sp);
  free(sp);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
mov    %edi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
cmpl   $0x3,-0x8(%rbp)
jge    116a <main+0x3a>
lea    0xea9(%rip),%rdi
mov    $0x0,%al
call   1050 <printf@plt>
movl   $0x0,-0x4(%rbp)
jmp    11a5 <main+0x75>
mov    -0x10(%rbp),%rax
mov    0x8(%rax),%rdi
mov    -0x10(%rbp),%rax
mov    0x10(%rax),%rsi
call   1040 <multiply@plt>
mov    %rax,-0x18(%rbp)
mov    -0x18(%rbp),%rsi
lea    0xe90(%rip),%rdi
mov    $0x0,%al
call   1050 <printf@plt>
mov    -0x18(%rbp),%rdi
call   1030 <free@plt>
movl   $0x0,-0x4(%rbp)
mov    -0x4(%rbp),%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
cmp    $0x2,%edi
jg     1154 <main+0x14>
lea    0xec0(%rip),%rdi
call   1050 <puts@plt>
jmp    117d <main+0x3d>
mov    0x8(%rsi),%rdi
mov    0x10(%rsi),%rsi
call   1040 <multiply@plt>
mov    %rax,%rbx
lea    0xe95(%rip),%rdi
mov    %rax,%rsi
xor    %eax,%eax
call   1060 <printf@plt>
mov    %rbx,%rdi
call   1030 <free@plt>
xor    %eax,%eax
pop    %rbx
ret

LLVM IR (-O0):
@.str = [30 x i8] c"multiply <number1> <number2>\0A\00"
@.str.1 = [13 x i8] c"Product: %s\0A\00"
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8**
%6 = alloca 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, 3
br i1 %8, label %9, label %11
9: ; preds = %2
%10 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([30 x i8], [30 x i8]* @.str, i64 0, i64 0))
store i32 0, i32* %3
br label %23
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 i8* @multiply(i8* %14, i8* %17)
store i8* %18, i8** %6
%19 = load i8*, i8** %6
%20 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([13 x i8], [13 x i8]* @.str.1, i64 0, i64 0), i8* %19)
%21 = load i8*, i8** %6
%22 = call i32 @free(i8* %21)
store i32 0, i32* %3
br label %23
23: ; preds = %11, %9
%24 = load i32, i32* %3
ret i32 %24
}

LLVM IR (-O2):
@.str.1 = [13 x i8] c"Product: %s\0A\00"
@str = [29 x i8] c"multiply <number1> <number2>\00"
define i32 @main(i32 %0, i8** nocapture %1) {
%3 = icmp slt i32 %0, 3
br i1 %3, label %4, label %6
4: ; preds = %2
%5 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([29 x i8], [29 x i8]* @str, i64 0, i64 0))
br label %14
6: ; preds = %2
%7 = getelementptr inbounds i8*, i8** %1, i64 1
%8 = load i8*, i8** %7
%9 = getelementptr inbounds i8*, i8** %1, i64 2
%10 = load i8*, i8** %9
%11 = tail call i8* @multiply(i8* %8, i8* %10)
%12 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str.1, i64 0, i64 0), i8* %11)
%13 = tail call i32 @free(i8* %11)
br label %14
14: ; preds = %6, %4
ret i32 0
}