#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 */
char find_grade(float, float, float, float, float);
int /*<<< orphan*/ printf(char *, ...);
int /*<<< orphan*/ scanf(char *, float *, ...);
int main(void) {
  float a;
  float b;
  float c;
  float d;
  float student_score;
  char grade;
  printf("Enter thresholds for A, B, C, D\nin that order, decreasing "
         "percentages > ");
  scanf("%f%f%f%f", &a, &b, &c, &d);
  printf("Thank you. Now enter student score (percent) >");
  scanf("%f", &student_score);
  grade = find_grade(student_score, a, b, c, d);
  if (grade == 'F')
    printf("Student has failed the course\n");
  else
    printf("Student has an %c grade\n", grade);
  return (0);
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xeba(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
lea    0xef5(%rip),%rdi
lea    -0x8(%rbp),%rsi
lea    -0xc(%rbp),%rdx
lea    -0x10(%rbp),%rcx
lea    -0x14(%rbp),%r8
mov    $0x0,%al
call   1050 <scanf@plt>
lea    0xee0(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
lea    0xecf(%rip),%rdi
lea    -0x18(%rbp),%rsi
mov    $0x0,%al
call   1050 <scanf@plt>
movss  -0x18(%rbp),%xmm0
movss  -0x8(%rbp),%xmm1
movss  -0xc(%rbp),%xmm2
movss  -0x10(%rbp),%xmm3
movss  -0x14(%rbp),%xmm4
call   1030 <find_grade@plt>
mov    %al,-0x19(%rbp)
movsbl -0x19(%rbp),%eax
cmp    $0x46,%eax
jne    11cc <main+0x9c>
lea    0xec1(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
jmp    11de <main+0xae>
movsbl -0x19(%rbp),%esi
lea    0xec9(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
xor    %eax,%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
sub    $0x18,%rsp
lea    0xeb5(%rip),%rdi
xor    %eax,%eax
call   1050 <printf@plt>
lea    0xef0(%rip),%rdi
lea    0x14(%rsp),%rsi
lea    0x10(%rsp),%rdx
lea    0xc(%rsp),%rcx
lea    0x8(%rsp),%r8
xor    %eax,%eax
call   1060 <scanf@plt>
lea    0xed7(%rip),%rdi
xor    %eax,%eax
call   1050 <printf@plt>
lea    0xec6(%rip),%rdi
lea    0x4(%rsp),%rsi
xor    %eax,%eax
call   1060 <scanf@plt>
movss  0x4(%rsp),%xmm0
movss  0x14(%rsp),%xmm1
movss  0x10(%rsp),%xmm2
movss  0xc(%rsp),%xmm3
movss  0x8(%rsp),%xmm4
call   1030 <find_grade@plt>
cmp    $0x46,%al
jne    11ca <main+0x8a>
lea    0xed7(%rip),%rdi
call   1040 <puts@plt>
jmp    11db <main+0x9b>
movsbl %al,%esi
lea    0xead(%rip),%rdi
xor    %eax,%eax
call   1050 <printf@plt>
xor    %eax,%eax
add    $0x18,%rsp
ret

LLVM IR (-O0):
@.str = [73 x i8] c"Enter thresholds for A, B, C, D\0Ain that order, decreasing percentages > \00"
@.str.1 = [9 x i8] c"%f%f%f%f\00"
@.str.2 = [47 x i8] c"Thank you. Now enter student score (percent) >\00"
@.str.3 = [3 x i8] c"%f\00"
@.str.4 = [31 x i8] c"Student has failed the course\0A\00"
@.str.5 = [25 x i8] c"Student has an %c grade\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca float
%3 = alloca float
%4 = alloca float
%5 = alloca float
%6 = alloca float
%7 = alloca i8
store i32 0, i32* %1
%8 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([73 x i8], [73 x i8]* @.str, i64 0, i64 0))
%9 = call i32 (i8*, float*, ...) @scanf(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.1, i64 0, i64 0), float* %2, float* %3, float* %4, float* %5)
%10 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([47 x i8], [47 x i8]* @.str.2, i64 0, i64 0))
%11 = call i32 (i8*, float*, ...) @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.3, i64 0, i64 0), float* %6)
%12 = load float, float* %6
%13 = load float, float* %2
%14 = load float, float* %3
%15 = load float, float* %4
%16 = load float, float* %5
%17 = call signext i8 @find_grade(float %12, float %13, float %14, float %15, float %16)
store i8 %17, i8* %7
%18 = load i8, i8* %7
%19 = sext i8 %18 to i32
%20 = icmp eq i32 %19, 70
br i1 %20, label %21, label %23
21: ; preds = %0
%22 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([31 x i8], [31 x i8]* @.str.4, i64 0, i64 0))
br label %27
23: ; preds = %0
%24 = load i8, i8* %7
%25 = sext i8 %24 to i32
%26 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([25 x i8], [25 x i8]* @.str.5, i64 0, i64 0), i32 %25)
br label %27
27: ; preds = %23, %21
ret i32 0
}

LLVM IR (-O2):
@.str = [73 x i8] c"Enter thresholds for A, B, C, D\0Ain that order, decreasing percentages > \00"
@.str.1 = [9 x i8] c"%f%f%f%f\00"
@.str.2 = [47 x i8] c"Thank you. Now enter student score (percent) >\00"
@.str.3 = [3 x i8] c"%f\00"
@.str.5 = [25 x i8] c"Student has an %c grade\0A\00"
@str = [30 x i8] c"Student has failed the course\00"
define i32 @main() {
%1 = alloca float
%2 = alloca float
%3 = alloca float
%4 = alloca float
%5 = alloca float
%6 = bitcast float* %1 to i8*
%7 = bitcast float* %2 to i8*
%8 = bitcast float* %3 to i8*
%9 = bitcast float* %4 to i8*
%10 = bitcast float* %5 to i8*
%11 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([73 x i8], [73 x i8]* @.str, i64 0, i64 0))
%12 = call i32 (i8*, float*, ...) @scanf(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.1, i64 0, i64 0), float* %1, float* %2, float* %3, float* %4)
%13 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([47 x i8], [47 x i8]* @.str.2, i64 0, i64 0))
%14 = call i32 (i8*, float*, ...) @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.3, i64 0, i64 0), float* %5)
%15 = load float, float* %5
%16 = load float, float* %1
%17 = load float, float* %2
%18 = load float, float* %3
%19 = load float, float* %4
%20 = call signext i8 @find_grade(float %15, float %16, float %17, float %18, float %19)
%21 = icmp eq i8 %20, 70
br i1 %21, label %22, label %24
22: ; preds = %0
%23 = call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([30 x i8], [30 x i8]* @str, i64 0, i64 0))
br label %27
24: ; preds = %0
%25 = sext i8 %20 to i32
%26 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([25 x i8], [25 x i8]* @.str.5, i64 0, i64 0), i32 %25)
br label %27
27: ; preds = %24, %22
ret i32 0
}