#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 *, float);
int /*<<< orphan*/ scanf(char *, float *);
int main() {
  float a, max = 0;
  int i = 1;
  do {
    scanf("%f", &a);
    if (max < a)
      max = a;
    i++;
  } while (i <= 3);
  printf("%.1f\n", max);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
xorps  %xmm0,%xmm0
movss  %xmm0,-0xc(%rbp)
movl   $0x1,-0x10(%rbp)
lea    0xebb(%rip),%rdi
lea    -0x8(%rbp),%rsi
call   1040 <scanf@plt>
movss  -0xc(%rbp),%xmm1
movss  -0x8(%rbp),%xmm0
ucomiss %xmm1,%xmm0
jbe    116b <main+0x4b>
movss  -0x8(%rbp),%xmm0
movss  %xmm0,-0xc(%rbp)
mov    -0x10(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x10(%rbp)
cmpl   $0x3,-0x10(%rbp)
jle    113e <main+0x1e>
movss  -0xc(%rbp),%xmm0
lea    0xe79(%rip),%rdi
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %r14
push   %rbx
push   %rax
lea    0xed5(%rip),%rbx
lea    0x4(%rsp),%r14
mov    %rbx,%rdi
mov    %r14,%rsi
call   1040 <scanf@plt>
movss  0x4(%rsp),%xmm1
xorps  %xmm0,%xmm0
maxss  %xmm0,%xmm1
movss  %xmm1,(%rsp)
mov    %rbx,%rdi
mov    %r14,%rsi
call   1040 <scanf@plt>
movss  0x4(%rsp),%xmm0
maxss  (%rsp),%xmm0
movss  %xmm0,(%rsp)
mov    %rbx,%rdi
mov    %r14,%rsi
call   1040 <scanf@plt>
movss  0x4(%rsp),%xmm0
maxss  (%rsp),%xmm0
lea    0xe7e(%rip),%rdi
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x8,%rsp
pop    %rbx
pop    %r14
ret

LLVM IR (-O0):
@.str = [3 x i8] c"%f\00"
@.str.1 = [6 x i8] c"%.1f\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca float
%3 = alloca float
%4 = alloca i32
store i32 0, i32* %1
store float 0.000000e+00, float* %3
store i32 1, i32* %4
br label %5
5: ; preds = %15, %0
%6 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), float* %2)
%7 = load float, float* %3
%8 = load float, float* %2
%9 = fcmp olt float %7, %8
br i1 %9, label %10, label %12
10: ; preds = %5
%11 = load float, float* %2
store float %11, float* %3
br label %12
12: ; preds = %10, %5
%13 = load i32, i32* %4
%14 = add nsw i32 %13, 1
store i32 %14, i32* %4
br label %15
15: ; preds = %12
%16 = load i32, i32* %4
%17 = icmp sle i32 %16, 3
br i1 %17, label %5, label %18
18: ; preds = %15
%19 = load float, float* %3
%20 = call i32 @printf(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.1, i64 0, i64 0), float %19)
ret i32 0
}

LLVM IR (-O2):
@.str = [3 x i8] c"%f\00"
@.str.1 = [6 x i8] c"%.1f\0A\00"
define i32 @main() {
%1 = alloca float
%2 = bitcast float* %1 to i8*
%3 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), float* %1)
%4 = load float, float* %1
%5 = fcmp ogt float %4, 0.000000e+00
%6 = select i1 %5, float %4, float 0.000000e+00
%7 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), float* %1)
%8 = load float, float* %1
%9 = fcmp olt float %6, %8
%10 = select i1 %9, float %8, float %6
%11 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), float* %1)
%12 = load float, float* %1
%13 = fcmp olt float %10, %12
%14 = select i1 %13, float %12, float %10
%15 = call i32 @printf(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.1, i64 0, i64 0), float %14)
ret i32 0
}