#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 winsize {
  int ws_row;
  int ws_col;
};

/* Variables and functions */
int /*<<< orphan*/ STDOUT_FILENO;
int /*<<< orphan*/ TIOCGWINSZ;
scalar_t__ ioctl(int /*<<< orphan*/, int /*<<< orphan*/, struct winsize *);
int /*<<< orphan*/ printf(char *);
int getTermSize(int *rows, int *cols) {
  struct winsize w;
  if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &w)) {
    printf("Error accessing terminal parameters\n");
    return -1;
  }
  *rows = w.ws_row;
  *cols = w.ws_col;
  return 0;
}


x86 assembly (clang, -O0):
<getTermSize>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    %rdi,-0x10(%rbp)
mov    %rsi,-0x18(%rbp)
mov    0x2eb9(%rip),%rax
mov    (%rax),%edi
mov    0x2e90(%rip),%rax
mov    (%rax),%esi
lea    -0x20(%rbp),%rdx
call   1040 <ioctl@plt>
cmp    $0x0,%rax
je     116d <getTermSize+0x4d>
lea    0xea4(%rip),%rdi
call   1030 <printf@plt>
movl   $0xffffffff,-0x4(%rbp)
jmp    1186 <getTermSize+0x66>
mov    -0x20(%rbp),%ecx
mov    -0x10(%rbp),%rax
mov    %ecx,(%rax)
mov    -0x1c(%rbp),%ecx
mov    -0x18(%rbp),%rax
mov    %ecx,(%rax)
movl   $0x0,-0x4(%rbp)
mov    -0x4(%rbp),%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<getTermSize>:
push   %r14
push   %rbx
push   %rax
mov    %rsi,%r14
mov    %rdi,%rbx
mov    0x2ebf(%rip),%rax
mov    (%rax),%edi
mov    0x2e96(%rip),%rax
mov    (%rax),%esi
mov    %rsp,%rdx
call   1040 <ioctl@plt>
test   %rax,%rax
je     115c <getTermSize+0x3c>
lea    0xeb0(%rip),%rdi
call   1030 <puts@plt>
mov    $0xffffffff,%eax
jmp    116a <getTermSize+0x4a>
mov    (%rsp),%eax
mov    %eax,(%rbx)
mov    0x4(%rsp),%eax
mov    %eax,(%r14)
xor    %eax,%eax
add    $0x8,%rsp
pop    %rbx
pop    %r14
ret

LLVM IR (-O0):
%struct.winsize = type { i32, i32 }
@STDOUT_FILENO = global i32 0
@TIOCGWINSZ = global i32 0
@.str = [37 x i8] c"Error accessing terminal parameters\0A\00"
define i32 @getTermSize(i32* %0, i32* %1) {
%3 = alloca i32
%4 = alloca i32*
%5 = alloca i32*
%6 = alloca %struct.winsize
store i32* %0, i32** %4
store i32* %1, i32** %5
%7 = load i32, i32* @STDOUT_FILENO
%8 = load i32, i32* @TIOCGWINSZ
%9 = call i64 @ioctl(i32 %7, i32 %8, %struct.winsize* %6)
%10 = icmp ne i64 %9, 0
br i1 %10, label %11, label %13
11: ; preds = %2
%12 = call i32 @printf(i8* getelementptr inbounds ([37 x i8], [37 x i8]* @.str, i64 0, i64 0))
store i32 -1, i32* %3
br label %20
13: ; preds = %2
%14 = getelementptr inbounds %struct.winsize, %struct.winsize* %6, i32 0, i32 0
%15 = load i32, i32* %14
%16 = load i32*, i32** %4
store i32 %15, i32* %16
%17 = getelementptr inbounds %struct.winsize, %struct.winsize* %6, i32 0, i32 1
%18 = load i32, i32* %17
%19 = load i32*, i32** %5
store i32 %18, i32* %19
store i32 0, i32* %3
br label %20
20: ; preds = %13, %11
%21 = load i32, i32* %3
ret i32 %21
}

LLVM IR (-O2):
%struct.winsize = type { i32, i32 }
@STDOUT_FILENO = global i32 0
@TIOCGWINSZ = global i32 0
@str = [36 x i8] c"Error accessing terminal parameters\00"
define i32 @getTermSize(i32* nocapture writeonly %0, i32* nocapture writeonly %1) {
%3 = alloca %struct.winsize
%4 = bitcast %struct.winsize* %3 to i8*
%5 = load i32, i32* @STDOUT_FILENO
%6 = load i32, i32* @TIOCGWINSZ
%7 = call i64 @ioctl(i32 %5, i32 %6, %struct.winsize* %3)
%8 = icmp eq i64 %7, 0
br i1 %8, label %11, label %9
9: ; preds = %2
%10 = call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([36 x i8], [36 x i8]* @str, i64 0, i64 0))
br label %16
11: ; preds = %2
%12 = getelementptr inbounds %struct.winsize, %struct.winsize* %3, i64 0, i32 0
%13 = load i32, i32* %12
store i32 %13, i32* %0
%14 = getelementptr inbounds %struct.winsize, %struct.winsize* %3, i64 0, i32 1
%15 = load i32, i32* %14
store i32 %15, i32* %1
br label %16
16: ; preds = %11, %9
%17 = phi i32 [ -1, %9 ], [ 0, %11 ]
ret i32 %17
}