#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, ...);
int main(int argc, char *argv[]) {
  int i = 0;
  printf("Number of arguments: %d\n", argc);
  while (argv[i] != NULL) {
    printf("argv[%d]: %s\n", i, argv[i]);
    i++;
  }
  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)
movl   $0x0,-0x14(%rbp)
mov    -0x8(%rbp),%esi
lea    0xec9(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x10(%rbp),%rax
movslq -0x14(%rbp),%rcx
cmpq   $0x0,(%rax,%rcx,8)
je     117c <main+0x6c>
mov    -0x14(%rbp),%esi
mov    -0x10(%rbp),%rax
movslq -0x14(%rbp),%rcx
mov    (%rax,%rcx,8),%rdx
lea    0xeb2(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x14(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x14(%rbp)
jmp    113e <main+0x2e>
xor    %eax,%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %r15
push   %r14
push   %rbx
mov    %rsi,%r15
mov    %edi,%esi
lea    0xedf(%rip),%rdi
xor    %eax,%eax
call   1030 <printf@plt>
mov    (%r15),%rdx
test   %rdx,%rdx
je     115a <main+0x4a>
lea    0xee2(%rip),%r14
xor    %ebx,%ebx
nopl   0x0(%rax)
mov    %r14,%rdi
mov    %ebx,%esi
xor    %eax,%eax
call   1030 <printf@plt>
mov    0x8(%r15,%rbx,8),%rdx
add    $0x1,%rbx
test   %rdx,%rdx
jne    1140 <main+0x30>
xor    %eax,%eax
pop    %rbx
pop    %r14
pop    %r15
ret

LLVM IR (-O0):
@.str = [25 x i8] c"Number of arguments: %d\0A\00"
@.str.1 = [14 x i8] c"argv[%d]: %s\0A\00"
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8**
%6 = alloca i32
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
store i32 0, i32* %6
%7 = load i32, i32* %4
%8 = call i32 (i8*, i32, ...) @printf(i8* getelementptr inbounds ([25 x i8], [25 x i8]* @.str, i64 0, i64 0), i32 %7)
br label %9
9: ; preds = %16, %2
%10 = load i8**, i8*** %5
%11 = load i32, i32* %6
%12 = sext i32 %11 to i64
%13 = getelementptr inbounds i8*, i8** %10, i64 %12
%14 = load i8*, i8** %13
%15 = icmp ne i8* %14, null
br i1 %15, label %16, label %26
16: ; preds = %9
%17 = load i32, i32* %6
%18 = load i8**, i8*** %5
%19 = load i32, i32* %6
%20 = sext i32 %19 to i64
%21 = getelementptr inbounds i8*, i8** %18, i64 %20
%22 = load i8*, i8** %21
%23 = call i32 (i8*, i32, ...) @printf(i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str.1, i64 0, i64 0), i32 %17, i8* %22)
%24 = load i32, i32* %6
%25 = add nsw i32 %24, 1
store i32 %25, i32* %6
br label %9
26: ; preds = %9
ret i32 0
}

LLVM IR (-O2):
@.str = [25 x i8] c"Number of arguments: %d\0A\00"
@.str.1 = [14 x i8] c"argv[%d]: %s\0A\00"
define i32 @main(i32 %0, i8** nocapture %1) {
%3 = tail call i32 (i8*, i32, ...) @printf(i8* getelementptr inbounds ([25 x i8], [25 x i8]* @.str, i64 0, i64 0), i32 %0)
%4 = load i8*, i8** %1
%5 = icmp eq i8* %4, null
br i1 %5, label %15, label %6
6: ; preds = %2, %6
%7 = phi i64 [ %11, %6 ], [ 0, %2 ]
%8 = phi i8* [ %13, %6 ], [ %4, %2 ]
%9 = trunc i64 %7 to i32
%10 = tail call i32 (i8*, i32, ...) @printf(i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str.1, i64 0, i64 0), i32 %9, i8* %8)
%11 = add nuw i64 %7, 1
%12 = getelementptr inbounds i8*, i8** %1, i64 %11
%13 = load i8*, i8** %12
%14 = icmp eq i8* %13, null
br i1 %14, label %15, label %6
15: ; preds = %6, %2
ret i32 0
}