#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 *);
int /*<<< orphan*/ scanf(char *, float *, ...);
int main() {
  float a, b, c, d, student;
  printf("Enter thresholds for A, B, C, D");
  printf("\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);
  if (student >= a)
    printf("Student has an A grade\n");
  else if (student >= b)
    printf("Student has an B grade\n");
  else if (student >= c)
    printf("Student has an C grade\n");
  else if (student >= d)
    printf("Student has an D grade\n");
  else if (student < d)
    printf("Student has failed the course\n");
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xeca(%rip),%rdi
call   1030 <printf@plt>
lea    0xede(%rip),%rdi
call   1030 <printf@plt>
lea    0xefc(%rip),%rdi
lea    -0x8(%rbp),%rsi
lea    -0xc(%rbp),%rdx
lea    -0x10(%rbp),%rcx
lea    -0x14(%rbp),%r8
mov    $0x0,%al
call   1040 <scanf@plt>
lea    0xee7(%rip),%rdi
call   1030 <printf@plt>
lea    0xed8(%rip),%rdi
lea    -0x18(%rbp),%rsi
mov    $0x0,%al
call   1040 <scanf@plt>
movss  -0x18(%rbp),%xmm0
ucomiss -0x8(%rbp),%xmm0
jb     11a3 <main+0x83>
lea    0xee9(%rip),%rdi
call   1030 <printf@plt>
jmp    1236 <main+0x116>
movss  -0x18(%rbp),%xmm0
ucomiss -0xc(%rbp),%xmm0
jb     11c3 <main+0xa3>
lea    0xee1(%rip),%rdi
call   1030 <printf@plt>
jmp    1231 <main+0x111>
movss  -0x18(%rbp),%xmm0
ucomiss -0x10(%rbp),%xmm0
jb     11e3 <main+0xc3>
lea    0xed9(%rip),%rdi
call   1030 <printf@plt>
jmp    122c <main+0x10c>
movss  -0x18(%rbp),%xmm0
ucomiss -0x14(%rbp),%xmm0
jb     1203 <main+0xe3>
lea    0xed1(%rip),%rdi
call   1030 <printf@plt>
jmp    1227 <main+0x107>
movss  -0x18(%rbp),%xmm1
movss  -0x14(%rbp),%xmm0
ucomiss %xmm1,%xmm0
jbe    1222 <main+0x102>
lea    0xec5(%rip),%rdi
call   1030 <printf@plt>
jmp    1227 <main+0x107>
jmp    122c <main+0x10c>
jmp    1231 <main+0x111>
jmp    1236 <main+0x116>
xor    %eax,%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
sub    $0x18,%rsp
lea    0xec5(%rip),%rdi
call   1040 <printf@plt>
lea    0xed9(%rip),%rdi
call   1040 <printf@plt>
lea    0xef7(%rip),%rdi
lea    0x14(%rsp),%rsi
lea    0x10(%rsp),%rdx
lea    0xc(%rsp),%rcx
lea    0x8(%rsp),%r8
xor    %eax,%eax
call   1050 <scanf@plt>
lea    0xede(%rip),%rdi
call   1040 <printf@plt>
lea    0xecf(%rip),%rdi
lea    0x4(%rsp),%rsi
xor    %eax,%eax
call   1050 <scanf@plt>
movss  0x4(%rsp),%xmm0
ucomiss 0x14(%rsp),%xmm0
jae    11c1 <main+0x91>
ucomiss 0x10(%rsp),%xmm0
jae    11ca <main+0x9a>
ucomiss 0xc(%rsp),%xmm0
jae    11d3 <main+0xa3>
movss  0x8(%rsp),%xmm1
ucomiss %xmm1,%xmm0
jae    11dc <main+0xac>
ucomiss %xmm0,%xmm1
jbe    11e8 <main+0xb8>
lea    0xec3(%rip),%rdi
jmp    11e3 <main+0xb3>
lea    0xf1d(%rip),%rdi
jmp    11e3 <main+0xb3>
lea    0xefd(%rip),%rdi
jmp    11e3 <main+0xb3>
lea    0xedd(%rip),%rdi
jmp    11e3 <main+0xb3>
lea    0xebd(%rip),%rdi
call   1030 <puts@plt>
xor    %eax,%eax
add    $0x18,%rsp
ret

LLVM IR (-O0):
@.str = [32 x i8] c"Enter thresholds for A, B, C, D\00"
@.str.1 = [42 x i8] c"\0Ain that order, decreasing percentages > \00"
@.str.2 = [9 x i8] c"%f%f%f%f\00"
@.str.3 = [47 x i8] c"Thank you. Now enter student score (percent) >\00"
@.str.4 = [3 x i8] c"%f\00"
@.str.5 = [24 x i8] c"Student has an A grade\0A\00"
@.str.6 = [24 x i8] c"Student has an B grade\0A\00"
@.str.7 = [24 x i8] c"Student has an C grade\0A\00"
@.str.8 = [24 x i8] c"Student has an D grade\0A\00"
@.str.9 = [31 x i8] c"Student has failed the course\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca float
%3 = alloca float
%4 = alloca float
%5 = alloca float
%6 = alloca float
store i32 0, i32* %1
%7 = call i32 @printf(i8* getelementptr inbounds ([32 x i8], [32 x i8]* @.str, i64 0, i64 0))
%8 = call i32 @printf(i8* getelementptr inbounds ([42 x i8], [42 x i8]* @.str.1, i64 0, i64 0))
%9 = call i32 (i8*, float*, ...) @scanf(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.2, i64 0, i64 0), float* %2, float* %3, float* %4, float* %5)
%10 = call i32 @printf(i8* getelementptr inbounds ([47 x i8], [47 x i8]* @.str.3, i64 0, i64 0))
%11 = call i32 (i8*, float*, ...) @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.4, i64 0, i64 0), float* %6)
%12 = load float, float* %6
%13 = load float, float* %2
%14 = fcmp oge float %12, %13
br i1 %14, label %15, label %17
15: ; preds = %0
%16 = call i32 @printf(i8* getelementptr inbounds ([24 x i8], [24 x i8]* @.str.5, i64 0, i64 0))
br label %45
17: ; preds = %0
%18 = load float, float* %6
%19 = load float, float* %3
%20 = fcmp oge float %18, %19
br i1 %20, label %21, label %23
21: ; preds = %17
%22 = call i32 @printf(i8* getelementptr inbounds ([24 x i8], [24 x i8]* @.str.6, i64 0, i64 0))
br label %44
23: ; preds = %17
%24 = load float, float* %6
%25 = load float, float* %4
%26 = fcmp oge float %24, %25
br i1 %26, label %27, label %29
27: ; preds = %23
%28 = call i32 @printf(i8* getelementptr inbounds ([24 x i8], [24 x i8]* @.str.7, i64 0, i64 0))
br label %43
29: ; preds = %23
%30 = load float, float* %6
%31 = load float, float* %5
%32 = fcmp oge float %30, %31
br i1 %32, label %33, label %35
33: ; preds = %29
%34 = call i32 @printf(i8* getelementptr inbounds ([24 x i8], [24 x i8]* @.str.8, i64 0, i64 0))
br label %42
35: ; preds = %29
%36 = load float, float* %6
%37 = load float, float* %5
%38 = fcmp olt float %36, %37
br i1 %38, label %39, label %41
39: ; preds = %35
%40 = call i32 @printf(i8* getelementptr inbounds ([31 x i8], [31 x i8]* @.str.9, i64 0, i64 0))
br label %41
41: ; preds = %39, %35
br label %42
42: ; preds = %41, %33
br label %43
43: ; preds = %42, %27
br label %44
44: ; preds = %43, %21
br label %45
45: ; preds = %44, %15
ret i32 0
}

LLVM IR (-O2):
@.str = [32 x i8] c"Enter thresholds for A, B, C, D\00"
@.str.1 = [42 x i8] c"\0Ain that order, decreasing percentages > \00"
@.str.2 = [9 x i8] c"%f%f%f%f\00"
@.str.3 = [47 x i8] c"Thank you. Now enter student score (percent) >\00"
@.str.4 = [3 x i8] c"%f\00"
@str = [30 x i8] c"Student has failed the course\00"
@str.10 = [23 x i8] c"Student has an D grade\00"
@str.11 = [23 x i8] c"Student has an C grade\00"
@str.12 = [23 x i8] c"Student has an B grade\00"
@str.13 = [23 x i8] c"Student has an A grade\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 @printf(i8* dereferenceable(1) getelementptr inbounds ([32 x i8], [32 x i8]* @.str, i64 0, i64 0))
%12 = tail call i32 @printf(i8* dereferenceable(1) getelementptr inbounds ([42 x i8], [42 x i8]* @.str.1, i64 0, i64 0))
%13 = call i32 (i8*, float*, ...) @scanf(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.2, i64 0, i64 0), float* %1, float* %2, float* %3, float* %4)
%14 = call i32 @printf(i8* dereferenceable(1) getelementptr inbounds ([47 x i8], [47 x i8]* @.str.3, i64 0, i64 0))
%15 = call i32 (i8*, float*, ...) @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.4, i64 0, i64 0), float* %5)
%16 = load float, float* %5
%17 = load float, float* %1
%18 = fcmp ult float %16, %17
br i1 %18, label %19, label %30
19: ; preds = %0
%20 = load float, float* %2
%21 = fcmp ult float %16, %20
br i1 %21, label %22, label %30
22: ; preds = %19
%23 = load float, float* %3
%24 = fcmp ult float %16, %23
br i1 %24, label %25, label %30
25: ; preds = %22
%26 = load float, float* %4
%27 = fcmp ult float %16, %26
br i1 %27, label %28, label %30
28: ; preds = %25
%29 = fcmp olt float %16, %26
br i1 %29, label %30, label %33
30: ; preds = %28, %25, %22, %19, %0
%31 = phi i8* [ getelementptr inbounds ([23 x i8], [23 x i8]* @str.13, i64 0, i64 0), %0 ], [ getelementptr inbounds ([23 x i8], [23 x i8]* @str.12, i64 0, i64 0), %19 ], [ getelementptr inbounds ([23 x i8], [23 x i8]* @str.11, i64 0, i64 0), %22 ], [ getelementptr inbounds ([23 x i8], [23 x i8]* @str.10, i64 0, i64 0), %25 ], [ getelementptr inbounds ([30 x i8], [30 x i8]* @str, i64 0, i64 0), %28 ]
%32 = call i32 @puts(i8* dereferenceable(1) %31)
br label %33
33: ; preds = %30, %28
ret i32 0
}