#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 *, ...);
void builtin_echo(char *c_argv[], int c_argc) {
  int i;
  for (i = 1; i <= c_argc; i++) {
    if (i == c_argc) {
      printf("%s", c_argv[i]);
    } else {
      printf("%s ", c_argv[i]);
    }
  }
  printf("\n");
}


x86 assembly (clang, -O0):
<builtin_echo>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
mov    %rdi,-0x8(%rbp)
mov    %esi,-0xc(%rbp)
movl   $0x1,-0x10(%rbp)
mov    -0x10(%rbp),%eax
cmp    -0xc(%rbp),%eax
jg     118a <builtin_echo+0x7a>
mov    -0x10(%rbp),%eax
cmp    -0xc(%rbp),%eax
jne    115d <builtin_echo+0x4d>
mov    -0x8(%rbp),%rax
movslq -0x10(%rbp),%rcx
mov    (%rax,%rcx,8),%rsi
lea    0xeaf(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
jmp    1177 <builtin_echo+0x67>
mov    -0x8(%rbp),%rax
movslq -0x10(%rbp),%rcx
mov    (%rax,%rcx,8),%rsi
lea    0xe93(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
jmp    117c <builtin_echo+0x6c>
mov    -0x10(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x10(%rbp)
jmp    1126 <builtin_echo+0x16>
lea    0xe76(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<builtin_echo>:
push   %rbp
push   %r15
push   %r14
push   %r13
push   %r12
push   %rbx
push   %rax
test   %esi,%esi
jle    116e <builtin_echo+0x4e>
mov    %esi,%r12d
mov    %rdi,%r14
mov    %esi,%r15d
add    $0x1,%r12d
mov    $0x1,%ebx
lea    0xeb8(%rip),%r13
lea    0xeb4(%rip),%rbp
nop
cmp    %rbx,%r15
mov    %rbp,%rdi
cmove  %r13,%rdi
mov    (%r14,%rbx,8),%rsi
xor    %eax,%eax
call   1040 <printf@plt>
add    $0x1,%rbx
cmp    %rbx,%r12
jne    1150 <builtin_echo+0x30>
mov    $0xa,%edi
add    $0x8,%rsp
pop    %rbx
pop    %r12
pop    %r13
pop    %r14
pop    %r15
pop    %rbp
jmp    1030 <putchar@plt>

LLVM IR (-O0):
@.str = [3 x i8] c"%s\00"
@.str.1 = [4 x i8] c"%s \00"
@.str.2 = [2 x i8] c"\0A\00"
define void @builtin_echo(i8** %0, i32 %1) {
%3 = alloca i8**
%4 = alloca i32
%5 = alloca i32
store i8** %0, i8*** %3
store i32 %1, i32* %4
store i32 1, i32* %5
br label %6
6: ; preds = %29, %2
%7 = load i32, i32* %5
%8 = load i32, i32* %4
%9 = icmp sle i32 %7, %8
br i1 %9, label %10, label %32
10: ; preds = %6
%11 = load i32, i32* %5
%12 = load i32, i32* %4
%13 = icmp eq i32 %11, %12
br i1 %13, label %14, label %21
14: ; preds = %10
%15 = load i8**, i8*** %3
%16 = load i32, i32* %5
%17 = sext i32 %16 to i64
%18 = getelementptr inbounds i8*, i8** %15, i64 %17
%19 = load i8*, i8** %18
%20 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), i8* %19)
br label %28
21: ; preds = %10
%22 = load i8**, i8*** %3
%23 = load i32, i32* %5
%24 = sext i32 %23 to i64
%25 = getelementptr inbounds i8*, i8** %22, i64 %24
%26 = load i8*, i8** %25
%27 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), i8* %26)
br label %28
28: ; preds = %21, %14
br label %29
29: ; preds = %28
%30 = load i32, i32* %5
%31 = add nsw i32 %30, 1
store i32 %31, i32* %5
br label %6
32: ; preds = %6
%33 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.2, i64 0, i64 0))
ret void
}

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