#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 main(int argc, char **argv) {
  printf("Hello argv!\n");
  printf("argc len = %d\n", argc);
  for (int i = 0; i < argc; ++i) {
    printf("argv[ %d ] = %s\n", i, argv[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)
lea    0xed3(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x8(%rbp),%esi
lea    0xecf(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
movl   $0x0,-0x14(%rbp)
mov    -0x14(%rbp),%eax
cmp    -0x8(%rbp),%eax
jge    1183 <main+0x73>
mov    -0x14(%rbp),%esi
mov    -0x10(%rbp),%rax
movslq -0x14(%rbp),%rcx
mov    (%rax,%rcx,8),%rdx
lea    0xeae(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x14(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x14(%rbp)
jmp    114c <main+0x3c>
xor    %eax,%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %r15
push   %r14
push   %r12
push   %rbx
push   %rax
mov    %rsi,%r15
mov    %edi,%ebx
lea    0xeec(%rip),%rdi
call   1030 <puts@plt>
lea    0xec0(%rip),%rdi
mov    %ebx,%esi
xor    %eax,%eax
call   1040 <printf@plt>
test   %ebx,%ebx
jle    1179 <main+0x59>
mov    %ebx,%r12d
lea    0xeb8(%rip),%r14
xor    %ebx,%ebx
nopl   0x0(%rax)
mov    (%r15,%rbx,8),%rdx
mov    %r14,%rdi
mov    %ebx,%esi
xor    %eax,%eax
call   1040 <printf@plt>
add    $0x1,%rbx
cmp    %rbx,%r12
jne    1160 <main+0x40>
xor    %eax,%eax
add    $0x8,%rsp
pop    %rbx
pop    %r12
pop    %r14
pop    %r15
ret

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

LLVM IR (-O2):
@.str.1 = [15 x i8] c"argc len = %d\0A\00"
@.str.2 = [17 x i8] c"argv[ %d ] = %s\0A\00"
@str = [12 x i8] c"Hello argv!\00"
define i32 @main(i32 %0, i8** nocapture %1) {
%3 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([12 x i8], [12 x i8]* @str, i64 0, i64 0))
%4 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([15 x i8], [15 x i8]* @.str.1, i64 0, i64 0), i32 %0)
%5 = icmp sgt i32 %0, 0
br i1 %5, label %6, label %8
6: ; preds = %2
%7 = zext i32 %0 to i64
br label %9
8: ; preds = %9, %2
ret i32 0
9: ; preds = %6, %9
%10 = phi i64 [ 0, %6 ], [ %15, %9 ]
%11 = getelementptr inbounds i8*, i8** %1, i64 %10
%12 = load i8*, i8** %11
%13 = trunc i64 %10 to i32
%14 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([17 x i8], [17 x i8]* @.str.2, i64 0, i64 0), i32 %13, i8* %12)
%15 = add nuw nsw i64 %10, 1
%16 = icmp eq i64 %15, %7
br i1 %16, label %8, label %9
}