#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*/ exit(int);
int /*<<< orphan*/ printf(char *, char const *);
int /*<<< orphan*/ puts(char *);
void print_usage(const char *prog) {
  printf("Usage: %s [-DsbdlHOLC3] [X] \n", prog ? prog : "");
  puts("  -D --device   device to use (default /dev/spidev1.1)\n"
       "  -s --speed    max speed (Hz)\n"
       "  -d --delay    delay (usec)\n"
       "  -b --bpw      bits per word \n"
       "  -l --loop     loopback\n"
       "  -H --cpha     clock phase\n"
       "  -O --cpol     clock polarity\n"
       "  -L --lsb      least significant bit first\n"
       "  -C --cs-high  chip select active high\n"
       "  -3 --3wire    SI/SO signals shared\n"
       "  -X --xdata    hexadecimal data\n"
       "./spidev_test -D /dev/spidev1.1 -s 26000000 -b 8 -X 0xbb 0xcc\n");
  if (prog)
    exit(1);
}


x86 assembly (clang, -O0):
<print_usage>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
mov    %rdi,-0x8(%rbp)
cmpq   $0x0,-0x8(%rbp)
je     1154 <print_usage+0x24>
mov    -0x8(%rbp),%rax
mov    %rax,-0x10(%rbp)
jmp    1164 <print_usage+0x34>
lea    0xec2(%rip),%rax
mov    %rax,-0x10(%rbp)
jmp    1164 <print_usage+0x34>
mov    -0x10(%rbp),%rsi
lea    0xe91(%rip),%rdi
call   1040 <printf@plt>
lea    0xea3(%rip),%rdi
call   1030 <puts@plt>
cmpq   $0x0,-0x8(%rbp)
je     1195 <print_usage+0x65>
mov    $0x1,%edi
call   1050 <exit@plt>
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<print_usage>:
push   %rbx
mov    %rdi,%rbx
test   %rdi,%rdi
lea    0xedf(%rip),%rsi
cmovne %rdi,%rsi
lea    0xeb7(%rip),%rdi
call   1040 <printf@plt>
lea    0xec9(%rip),%rdi
call   1030 <puts@plt>
test   %rbx,%rbx
jne    1161 <print_usage+0x31>
pop    %rbx
ret
mov    $0x1,%edi
call   1050 <exit@plt>

LLVM IR (-O0):
@.str = [30 x i8] c"Usage: %s [-DsbdlHOLC3] [X] \0A\00"
@.str.1 = [1 x i8] zeroinitializer
@.str.2 = [447 x i8] c" -D --device device to use (default /dev/spidev1.1)\0A -s --speed max speed (Hz)\0A -d --delay delay (usec)\0A -b --bpw bits per word \0A -l --loop loopback\0A -H --cpha clock phase\0A -O --cpol clock polarity\0A -L --lsb least significant bit first\0A -C --cs-high chip select active high\0A -3 --3wire SI/SO signals shared\0A -X --xdata hexadecimal data\0A./spidev_test -D /dev/spidev1.1 -s 26000000 -b 8 -X 0xbb 0xcc\0A\00"
define void @print_usage(i8* %0) {
%2 = alloca i8*
store i8* %0, i8** %2
%3 = load i8*, i8** %2
%4 = icmp ne i8* %3, null
br i1 %4, label %5, label %7
5: ; preds = %1
%6 = load i8*, i8** %2
br label %8
7: ; preds = %1
br label %8
8: ; preds = %7, %5
%9 = phi i8* [ %6, %5 ], [ getelementptr inbounds ([1 x i8], [1 x i8]* @.str.1, i64 0, i64 0), %7 ]
%10 = call i32 @printf(i8* getelementptr inbounds ([30 x i8], [30 x i8]* @.str, i64 0, i64 0), i8* %9)
%11 = call i32 @puts(i8* getelementptr inbounds ([447 x i8], [447 x i8]* @.str.2, i64 0, i64 0))
%12 = load i8*, i8** %2
%13 = icmp ne i8* %12, null
br i1 %13, label %14, label %16
14: ; preds = %8
%15 = call i32 @exit(i32 1)
unreachable
16: ; preds = %8
ret void
}

LLVM IR (-O2):
@.str = [30 x i8] c"Usage: %s [-DsbdlHOLC3] [X] \0A\00"
@.str.1 = [1 x i8] zeroinitializer
@.str.2 = [447 x i8] c" -D --device device to use (default /dev/spidev1.1)\0A -s --speed max speed (Hz)\0A -d --delay delay (usec)\0A -b --bpw bits per word \0A -l --loop loopback\0A -H --cpha clock phase\0A -O --cpol clock polarity\0A -L --lsb least significant bit first\0A -C --cs-high chip select active high\0A -3 --3wire SI/SO signals shared\0A -X --xdata hexadecimal data\0A./spidev_test -D /dev/spidev1.1 -s 26000000 -b 8 -X 0xbb 0xcc\0A\00"
define void @print_usage(i8* %0) {
%2 = icmp eq i8* %0, null
%3 = select i1 %2, i8* getelementptr inbounds ([1 x i8], [1 x i8]* @.str.1, i64 0, i64 0), i8* %0
%4 = tail call i32 @printf(i8* getelementptr inbounds ([30 x i8], [30 x i8]* @.str, i64 0, i64 0), i8* %3)
%5 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([447 x i8], [447 x i8]* @.str.2, i64 0, i64 0))
br i1 %2, label %8, label %6
6: ; preds = %1
%7 = tail call i32 @exit(i32 1)
unreachable
8: ; preds = %1
ret void
}