#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 usage() {
  printf("\nUsage: ./guass (0/1/2/3) (N)\n");
  printf("0 - sequential mode\n");
  printf("1 - Pthreads mode\n");
  printf("2 - OpenMP mode\n");
  printf("3 - Test all (not implemented)\n");
  printf("N - size of A array\n\n");
}


x86 assembly (clang, -O0):
<usage>:
push   %rbp
mov    %rsp,%rbp
lea    0xee5(%rip),%rdi
call   1030 <printf@plt>
lea    0xef8(%rip),%rdi
call   1030 <printf@plt>
lea    0xf01(%rip),%rdi
call   1030 <printf@plt>
lea    0xf08(%rip),%rdi
call   1030 <printf@plt>
lea    0xf0d(%rip),%rdi
call   1030 <printf@plt>
lea    0xf21(%rip),%rdi
call   1030 <printf@plt>
pop    %rbp
ret

x86 assembly (clang, -O2):
<usage>:
push   %rax
lea    0xee8(%rip),%rdi
call   1030 <puts@plt>
lea    0xefa(%rip),%rdi
call   1030 <puts@plt>
lea    0xf02(%rip),%rdi
call   1030 <puts@plt>
lea    0xf08(%rip),%rdi
call   1030 <puts@plt>
lea    0xf0c(%rip),%rdi
call   1030 <puts@plt>
lea    0xf1f(%rip),%rdi
pop    %rax
jmp    1030 <puts@plt>

LLVM IR (-O0):
@.str = [31 x i8] c"\0AUsage: ./guass (0/1/2/3) (N)\0A\00"
@.str.1 = [21 x i8] c"0 - sequential mode\0A\00"
@.str.2 = [19 x i8] c"1 - Pthreads mode\0A\00"
@.str.3 = [17 x i8] c"2 - OpenMP mode\0A\00"
@.str.4 = [32 x i8] c"3 - Test all (not implemented)\0A\00"
@.str.5 = [22 x i8] c"N - size of A array\0A\0A\00"
define void @usage() {
%1 = call i32 @printf(i8* getelementptr inbounds ([31 x i8], [31 x i8]* @.str, i64 0, i64 0))
%2 = call i32 @printf(i8* getelementptr inbounds ([21 x i8], [21 x i8]* @.str.1, i64 0, i64 0))
%3 = call i32 @printf(i8* getelementptr inbounds ([19 x i8], [19 x i8]* @.str.2, i64 0, i64 0))
%4 = call i32 @printf(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str.3, i64 0, i64 0))
%5 = call i32 @printf(i8* getelementptr inbounds ([32 x i8], [32 x i8]* @.str.4, i64 0, i64 0))
%6 = call i32 @printf(i8* getelementptr inbounds ([22 x i8], [22 x i8]* @.str.5, i64 0, i64 0))
ret void
}

LLVM IR (-O2):
@str = [30 x i8] c"\0AUsage: ./guass (0/1/2/3) (N)\00"
@str.6 = [20 x i8] c"0 - sequential mode\00"
@str.7 = [18 x i8] c"1 - Pthreads mode\00"
@str.8 = [16 x i8] c"2 - OpenMP mode\00"
@str.9 = [31 x i8] c"3 - Test all (not implemented)\00"
@str.10 = [21 x i8] c"N - size of A array\0A\00"
define void @usage() {
%1 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([30 x i8], [30 x i8]* @str, i64 0, i64 0))
%2 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([20 x i8], [20 x i8]* @str.6, i64 0, i64 0))
%3 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([18 x i8], [18 x i8]* @str.7, i64 0, i64 0))
%4 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([16 x i8], [16 x i8]* @str.8, i64 0, i64 0))
%5 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([31 x i8], [31 x i8]* @str.9, i64 0, i64 0))
%6 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([21 x i8], [21 x i8]* @str.10, i64 0, i64 0))
ret void
}