#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 */
double atof(char *);
long magnitude(double);
int /*<<< orphan*/ printf(char *, ...);
int main(int argc, char *argv[]) {
  if (argc != 2) {
    printf("Usage %s val\n", argv[0]);
    return 0;
  }
  double val = atof(argv[1]);
  long m = magnitude(val);
  printf("Order of %.2f = %ld\n", val, m);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
mov    %edi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
cmpl   $0x2,-0x8(%rbp)
je     1171 <main+0x41>
mov    -0x10(%rbp),%rax
mov    (%rax),%rsi
lea    0xea2(%rip),%rdi
mov    $0x0,%al
call   1050 <printf@plt>
movl   $0x0,-0x4(%rbp)
jmp    11af <main+0x7f>
mov    -0x10(%rbp),%rax
mov    0x8(%rax),%rdi
call   1030 <atof@plt>
movsd  %xmm0,-0x18(%rbp)
movsd  -0x18(%rbp),%xmm0
call   1040 <magnitude@plt>
mov    %rax,-0x20(%rbp)
movsd  -0x18(%rbp),%xmm0
mov    -0x20(%rbp),%rsi
lea    0xe6d(%rip),%rdi
mov    $0x1,%al
call   1050 <printf@plt>
movl   $0x0,-0x4(%rbp)
mov    -0x4(%rbp),%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rax
cmp    $0x2,%edi
jne    1161 <main+0x31>
mov    0x8(%rsi),%rdi
call   1030 <atof@plt>
movsd  %xmm0,(%rsp)
call   1040 <magnitude@plt>
lea    0xebe(%rip),%rdi
movsd  (%rsp),%xmm0
mov    %rax,%rsi
mov    $0x1,%al
call   1050 <printf@plt>
jmp    1172 <main+0x42>
mov    (%rsi),%rsi
lea    0xe95(%rip),%rdi
xor    %eax,%eax
call   1050 <printf@plt>
xor    %eax,%eax
pop    %rcx
ret

LLVM IR (-O0):
@.str = [14 x i8] c"Usage %s val\0A\00"
@.str.1 = [21 x i8] c"Order of %.2f = %ld\0A\00"
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8**
%6 = alloca double
%7 = alloca i64
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
%8 = load i32, i32* %4
%9 = icmp ne i32 %8, 2
br i1 %9, label %10, label %15
10: ; preds = %2
%11 = load i8**, i8*** %5
%12 = getelementptr inbounds i8*, i8** %11, i64 0
%13 = load i8*, i8** %12
%14 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str, i64 0, i64 0), i8* %13)
store i32 0, i32* %3
br label %25
15: ; preds = %2
%16 = load i8**, i8*** %5
%17 = getelementptr inbounds i8*, i8** %16, i64 1
%18 = load i8*, i8** %17
%19 = call double @atof(i8* %18)
store double %19, double* %6
%20 = load double, double* %6
%21 = call i64 @magnitude(double %20)
store i64 %21, i64* %7
%22 = load double, double* %6
%23 = load i64, i64* %7
%24 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([21 x i8], [21 x i8]* @.str.1, i64 0, i64 0), double %22, i64 %23)
store i32 0, i32* %3
br label %25
25: ; preds = %15, %10
%26 = load i32, i32* %3
ret i32 %26
}

LLVM IR (-O2):
@.str = [14 x i8] c"Usage %s val\0A\00"
@.str.1 = [21 x i8] c"Order of %.2f = %ld\0A\00"
define i32 @main(i32 %0, i8** nocapture %1) {
%3 = icmp eq i32 %0, 2
br i1 %3, label %7, label %4
4: ; preds = %2
%5 = load i8*, i8** %1
%6 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([14 x i8], [14 x i8]* @.str, i64 0, i64 0), i8* %5)
br label %13
7: ; preds = %2
%8 = getelementptr inbounds i8*, i8** %1, i64 1
%9 = load i8*, i8** %8
%10 = tail call double @atof(i8* %9)
%11 = tail call i64 @magnitude(double %10)
%12 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([21 x i8], [21 x i8]* @.str.1, i64 0, i64 0), double %10, i64 %11)
br label %13
13: ; preds = %7, %4
ret i32 0
}