#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, 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", &Grade);
  if (Grade >= D) {
    if (Grade >= C) {
      if (Grade >= B) {
        if (Grade >= A) {
          printf("Student has an A grade\n");
        } else {
          printf("Student has an B grade\n");
        }
      } else {
        printf("Student has an C grade\n");
      }
    } else {
      printf("Student has an D grade\n");
    }
  } else {
    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    0xf07(%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    0xef2(%rip),%rdi
call   1030 <printf@plt>
lea    0xee3(%rip),%rdi
lea    -0x18(%rbp),%rsi
mov    $0x0,%al
call   1040 <scanf@plt>
movss  -0x18(%rbp),%xmm0
ucomiss -0x14(%rbp),%xmm0
jb     11f7 <main+0xd7>
movss  -0x18(%rbp),%xmm0
ucomiss -0x10(%rbp),%xmm0
jb     11e6 <main+0xc6>
movss  -0x18(%rbp),%xmm0
ucomiss -0xc(%rbp),%xmm0
jb     11d5 <main+0xb5>
movss  -0x18(%rbp),%xmm0
ucomiss -0x8(%rbp),%xmm0
jb     11c4 <main+0xa4>
lea    0xec7(%rip),%rdi
call   1030 <printf@plt>
jmp    11d0 <main+0xb0>
lea    0xece(%rip),%rdi
call   1030 <printf@plt>
jmp    11e1 <main+0xc1>
lea    0xed5(%rip),%rdi
call   1030 <printf@plt>
jmp    11f2 <main+0xd2>
lea    0xedc(%rip),%rdi
call   1030 <printf@plt>
jmp    1203 <main+0xe3>
lea    0xee3(%rip),%rdi
call   1030 <printf@plt>
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    0xf02(%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    0xee9(%rip),%rdi
call   1040 <printf@plt>
lea    0xeda(%rip),%rdi
lea    0x4(%rsp),%rsi
xor    %eax,%eax
call   1050 <scanf@plt>
movss  0x4(%rsp),%xmm0
ucomiss 0x8(%rsp),%xmm0
jae    1197 <main+0x67>
lea    0xeec(%rip),%rdi
jmp    11ce <main+0x9e>
ucomiss 0xc(%rsp),%xmm0
jae    11a7 <main+0x77>
lea    0xefa(%rip),%rdi
jmp    11ce <main+0x9e>
ucomiss 0x10(%rsp),%xmm0
jae    11b7 <main+0x87>
lea    0xf01(%rip),%rdi
jmp    11ce <main+0x9e>
ucomiss 0x14(%rsp),%xmm0
lea    0xf0a(%rip),%rax
lea    0xf1a(%rip),%rdi
cmovb  %rax,%rdi
call   1030 <puts@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 = [24 x i8] c"Student has an A grade\0A\00"
@.str.5 = [24 x i8] c"Student has an B grade\0A\00"
@.str.6 = [24 x i8] c"Student has an C grade\0A\00"
@.str.7 = [24 x i8] c"Student has an D grade\0A\00"
@.str.8 = [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 ([73 x i8], [73 x i8]* @.str, i64 0, i64 0))
%8 = 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)
%9 = call i32 @printf(i8* getelementptr inbounds ([47 x i8], [47 x i8]* @.str.2, i64 0, i64 0))
%10 = call i32 (i8*, float*, ...) @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.3, i64 0, i64 0), float* %6)
%11 = load float, float* %6
%12 = load float, float* %5
%13 = fcmp oge float %11, %12
br i1 %13, label %14, label %37
14: ; preds = %0
%15 = load float, float* %6
%16 = load float, float* %4
%17 = fcmp oge float %15, %16
br i1 %17, label %18, label %34
18: ; preds = %14
%19 = load float, float* %6
%20 = load float, float* %3
%21 = fcmp oge float %19, %20
br i1 %21, label %22, label %31
22: ; preds = %18
%23 = load float, float* %6
%24 = load float, float* %2
%25 = fcmp oge float %23, %24
br i1 %25, label %26, label %28
26: ; preds = %22
%27 = call i32 @printf(i8* getelementptr inbounds ([24 x i8], [24 x i8]* @.str.4, i64 0, i64 0))
br label %30
28: ; preds = %22
%29 = call i32 @printf(i8* getelementptr inbounds ([24 x i8], [24 x i8]* @.str.5, i64 0, i64 0))
br label %30
30: ; preds = %28, %26
br label %33
31: ; preds = %18
%32 = call i32 @printf(i8* getelementptr inbounds ([24 x i8], [24 x i8]* @.str.6, i64 0, i64 0))
br label %33
33: ; preds = %31, %30
br label %36
34: ; preds = %14
%35 = call i32 @printf(i8* getelementptr inbounds ([24 x i8], [24 x i8]* @.str.7, i64 0, i64 0))
br label %36
36: ; preds = %34, %33
br label %39
37: ; preds = %0
%38 = call i32 @printf(i8* getelementptr inbounds ([31 x i8], [31 x i8]* @.str.8, i64 0, i64 0))
br label %39
39: ; preds = %37, %36
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 = [30 x i8] c"Student has failed the course\00"
@str.9 = [23 x i8] c"Student has an D grade\00"
@str.10 = [23 x i8] c"Student has an C grade\00"
@str.11 = [23 x i8] c"Student has an B grade\00"
@str.12 = [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 ([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 @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* %4
%17 = fcmp ult float %15, %16
br i1 %17, label %28, label %18
18: ; preds = %0
%19 = load float, float* %3
%20 = fcmp ult float %15, %19
br i1 %20, label %28, label %21
21: ; preds = %18
%22 = load float, float* %2
%23 = fcmp ult float %15, %22
br i1 %23, label %28, label %24
24: ; preds = %21
%25 = load float, float* %1
%26 = fcmp ult float %15, %25
%27 = select i1 %26, i8* getelementptr inbounds ([23 x i8], [23 x i8]* @str.11, i64 0, i64 0), i8* getelementptr inbounds ([23 x i8], [23 x i8]* @str.12, i64 0, i64 0)
br label %28
28: ; preds = %0, %18, %21, %24
%29 = phi i8* [ %27, %24 ], [ getelementptr inbounds ([23 x i8], [23 x i8]* @str.10, i64 0, i64 0), %21 ], [ getelementptr inbounds ([23 x i8], [23 x i8]* @str.9, i64 0, i64 0), %18 ], [ getelementptr inbounds ([30 x i8], [30 x i8]* @str, i64 0, i64 0), %0 ]
%30 = call i32 @puts(i8* dereferenceable(1) %29)
ret i32 0
}