#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(void) {
  printf("Usage. Pls supply 3 or 4 arguments:\n");
  printf("\t1) name of text file with matrix.\n");
  printf("\t2) number of sites.\n");
  printf("\t3) branch length limit, i.e. duration of simulation: 0.1 is small, "
         "10 big, 1000 very big.\n");
  printf("\t4) (optional, if not supplied, a random seed will be generated) "
         "specified random number seed.\n");
}


x86 assembly (clang, -O0):
<usage>:
push   %rbp
mov    %rsp,%rbp
lea    0xee5(%rip),%rdi
call   1030 <printf@plt>
lea    0xefe(%rip),%rdi
call   1030 <printf@plt>
lea    0xf16(%rip),%rdi
call   1030 <printf@plt>
lea    0xf20(%rip),%rdi
call   1030 <printf@plt>
lea    0xf70(%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    0xf00(%rip),%rdi
call   1030 <puts@plt>
lea    0xf17(%rip),%rdi
call   1030 <puts@plt>
lea    0xf20(%rip),%rdi
call   1030 <puts@plt>
lea    0xf6f(%rip),%rdi
pop    %rax
jmp    1030 <puts@plt>

LLVM IR (-O0):
@.str = [37 x i8] c"Usage. Pls supply 3 or 4 arguments:\0A\00"
@.str.1 = [36 x i8] c"\091) name of text file with matrix.\0A\00"
@.str.2 = [22 x i8] c"\092) number of sites.\0A\00"
@.str.3 = [92 x i8] c"\093) branch length limit, i.e. duration of simulation: 0.1 is small, 10 big, 1000 very big.\0A\00"
@.str.4 = [96 x i8] c"\094) (optional, if not supplied, a random seed will be generated) specified random number seed.\0A\00"
define void @usage() {
%1 = call i32 @printf(i8* getelementptr inbounds ([37 x i8], [37 x i8]* @.str, i64 0, i64 0))
%2 = call i32 @printf(i8* getelementptr inbounds ([36 x i8], [36 x i8]* @.str.1, i64 0, i64 0))
%3 = call i32 @printf(i8* getelementptr inbounds ([22 x i8], [22 x i8]* @.str.2, i64 0, i64 0))
%4 = call i32 @printf(i8* getelementptr inbounds ([92 x i8], [92 x i8]* @.str.3, i64 0, i64 0))
%5 = call i32 @printf(i8* getelementptr inbounds ([96 x i8], [96 x i8]* @.str.4, i64 0, i64 0))
ret void
}

LLVM IR (-O2):
@str = [36 x i8] c"Usage. Pls supply 3 or 4 arguments:\00"
@str.5 = [35 x i8] c"\091) name of text file with matrix.\00"
@str.6 = [21 x i8] c"\092) number of sites.\00"
@str.7 = [91 x i8] c"\093) branch length limit, i.e. duration of simulation: 0.1 is small, 10 big, 1000 very big.\00"
@str.8 = [95 x i8] c"\094) (optional, if not supplied, a random seed will be generated) specified random number seed.\00"
define void @usage() {
%1 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([36 x i8], [36 x i8]* @str, i64 0, i64 0))
%2 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([35 x i8], [35 x i8]* @str.5, i64 0, i64 0))
%3 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([21 x i8], [21 x i8]* @str.6, i64 0, i64 0))
%4 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([91 x i8], [91 x i8]* @str.7, i64 0, i64 0))
%5 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([95 x i8], [95 x i8]* @str.8, i64 0, i64 0))
ret void
}