#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 */
struct gpio {
  int dummy;
};

/* Variables and functions */
int /*<<< orphan*/ bit_output(struct gpio *, int);
void output_all(struct gpio *gp) {
  int i;
  for (i = 0; i < 16; i++)
    bit_output(gp, i);
}


x86 assembly (clang, -O0):
<output_all>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
mov    %rdi,-0x8(%rbp)
movl   $0x0,-0xc(%rbp)
cmpl   $0x10,-0xc(%rbp)
jge    1147 <output_all+0x37>
mov    -0x8(%rbp),%rdi
mov    -0xc(%rbp),%esi
call   1030 <bit_output@plt>
mov    -0xc(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0xc(%rbp)
jmp    1123 <output_all+0x13>
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<output_all>:
push   %rbx
mov    %rdi,%rbx
xor    %esi,%esi
call   1030 <bit_output@plt>
mov    %rbx,%rdi
mov    $0x1,%esi
call   1030 <bit_output@plt>
mov    %rbx,%rdi
mov    $0x2,%esi
call   1030 <bit_output@plt>
mov    %rbx,%rdi
mov    $0x3,%esi
call   1030 <bit_output@plt>
mov    %rbx,%rdi
mov    $0x4,%esi
call   1030 <bit_output@plt>
mov    %rbx,%rdi
mov    $0x5,%esi
call   1030 <bit_output@plt>
mov    %rbx,%rdi
mov    $0x6,%esi
call   1030 <bit_output@plt>
mov    %rbx,%rdi
mov    $0x7,%esi
call   1030 <bit_output@plt>
mov    %rbx,%rdi
mov    $0x8,%esi
call   1030 <bit_output@plt>
mov    %rbx,%rdi
mov    $0x9,%esi
call   1030 <bit_output@plt>
mov    %rbx,%rdi
mov    $0xa,%esi
call   1030 <bit_output@plt>
mov    %rbx,%rdi
mov    $0xb,%esi
call   1030 <bit_output@plt>
mov    %rbx,%rdi
mov    $0xc,%esi
call   1030 <bit_output@plt>
mov    %rbx,%rdi
mov    $0xd,%esi
call   1030 <bit_output@plt>
mov    %rbx,%rdi
mov    $0xe,%esi
call   1030 <bit_output@plt>
mov    %rbx,%rdi
mov    $0xf,%esi
pop    %rbx
jmp    1030 <bit_output@plt>

LLVM IR (-O0):
%struct.gpio = type { i32 }
define void @output_all(%struct.gpio* %0) {
%2 = alloca %struct.gpio*
%3 = alloca i32
store %struct.gpio* %0, %struct.gpio** %2
store i32 0, i32* %3
br label %4
4: ; preds = %11, %1
%5 = load i32, i32* %3
%6 = icmp slt i32 %5, 16
br i1 %6, label %7, label %14
7: ; preds = %4
%8 = load %struct.gpio*, %struct.gpio** %2
%9 = load i32, i32* %3
%10 = call i32 @bit_output(%struct.gpio* %8, i32 %9)
br label %11
11: ; preds = %7
%12 = load i32, i32* %3
%13 = add nsw i32 %12, 1
store i32 %13, i32* %3
br label %4
14: ; preds = %4
ret void
}

LLVM IR (-O2):
%struct.gpio = type { i32 }
define void @output_all(%struct.gpio* %0) {
%2 = tail call i32 @bit_output(%struct.gpio* %0, i32 0)
%3 = tail call i32 @bit_output(%struct.gpio* %0, i32 1)
%4 = tail call i32 @bit_output(%struct.gpio* %0, i32 2)
%5 = tail call i32 @bit_output(%struct.gpio* %0, i32 3)
%6 = tail call i32 @bit_output(%struct.gpio* %0, i32 4)
%7 = tail call i32 @bit_output(%struct.gpio* %0, i32 5)
%8 = tail call i32 @bit_output(%struct.gpio* %0, i32 6)
%9 = tail call i32 @bit_output(%struct.gpio* %0, i32 7)
%10 = tail call i32 @bit_output(%struct.gpio* %0, i32 8)
%11 = tail call i32 @bit_output(%struct.gpio* %0, i32 9)
%12 = tail call i32 @bit_output(%struct.gpio* %0, i32 10)
%13 = tail call i32 @bit_output(%struct.gpio* %0, i32 11)
%14 = tail call i32 @bit_output(%struct.gpio* %0, i32 12)
%15 = tail call i32 @bit_output(%struct.gpio* %0, i32 13)
%16 = tail call i32 @bit_output(%struct.gpio* %0, i32 14)
%17 = tail call i32 @bit_output(%struct.gpio* %0, i32 15)
ret void
}