#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 EXIT_SUCCESS;
int /*<<< orphan*/ printf(char *, ...);
int main(void) {
  float fahr, celsius;
  int lower, upper, step;
  lower = 0;
  upper = 300;
  step = 20;
  printf("  F    C  \n");
  printf("----------\n");
  celsius = (float)upper;
  for (; upper >= lower; upper -= step) {
    fahr = (float)(celsius * (9.0 / 5.0) + 32.0);
    printf("%3.0f %6.1f\n", celsius, fahr);
    celsius -= (float)step;
  }
  return EXIT_SUCCESS;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
movl   $0x0,-0x10(%rbp)
movl   $0x12c,-0x14(%rbp)
movl   $0x14,-0x18(%rbp)
lea    0xed5(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xed3(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
cvtsi2ssl -0x14(%rbp),%xmm0
movss  %xmm0,-0xc(%rbp)
mov    -0x14(%rbp),%eax
cmp    -0x10(%rbp),%eax
jl     11d3 <main+0xc3>
movss  -0xc(%rbp),%xmm0
cvtss2sd %xmm0,%xmm0
movsd  0xe89(%rip),%xmm1
mulsd  %xmm1,%xmm0
movsd  0xe85(%rip),%xmm1
addsd  %xmm1,%xmm0
cvtsd2ss %xmm0,%xmm0
movss  %xmm0,-0x8(%rbp)
movss  -0xc(%rbp),%xmm0
cvtss2sd %xmm0,%xmm0
movss  -0x8(%rbp),%xmm1
cvtss2sd %xmm1,%xmm1
lea    0xe7f(%rip),%rdi
mov    $0x2,%al
call   1030 <printf@plt>
cvtsi2ssl -0x18(%rbp),%xmm1
movss  -0xc(%rbp),%xmm0
subss  %xmm1,%xmm0
movss  %xmm0,-0xc(%rbp)
mov    -0x18(%rbp),%ecx
mov    -0x14(%rbp),%eax
sub    %ecx,%eax
mov    %eax,-0x14(%rbp)
jmp    115a <main+0x4a>
mov    0x2e06(%rip),%rax
mov    (%rax),%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
lea    0xfd5(%rip),%rdi
call   1030 <puts@plt>
lea    0xfd4(%rip),%rdi
call   1030 <puts@plt>
lea    0xfb0(%rip),%rbx
movsd  0xeb8(%rip),%xmm0
movsd  0xeb8(%rip),%xmm1
mov    %rbx,%rdi
mov    $0x2,%al
call   1040 <printf@plt>
movsd  0xeae(%rip),%xmm0
movsd  0xeae(%rip),%xmm1
mov    %rbx,%rdi
mov    $0x2,%al
call   1040 <printf@plt>
movsd  0xea4(%rip),%xmm0
movsd  0xea4(%rip),%xmm1
mov    %rbx,%rdi
mov    $0x2,%al
call   1040 <printf@plt>
movsd  0xe9a(%rip),%xmm0
movsd  0xe9a(%rip),%xmm1
mov    %rbx,%rdi
mov    $0x2,%al
call   1040 <printf@plt>
movsd  0xe90(%rip),%xmm0
movsd  0xe90(%rip),%xmm1
mov    %rbx,%rdi
mov    $0x2,%al
call   1040 <printf@plt>
movsd  0xe86(%rip),%xmm0
movsd  0xe86(%rip),%xmm1
mov    %rbx,%rdi
mov    $0x2,%al
call   1040 <printf@plt>
movsd  0xe7c(%rip),%xmm0
movsd  0xe7c(%rip),%xmm1
mov    %rbx,%rdi
mov    $0x2,%al
call   1040 <printf@plt>
movsd  0xe72(%rip),%xmm0
movsd  0xe72(%rip),%xmm1
mov    %rbx,%rdi
mov    $0x2,%al
call   1040 <printf@plt>
movsd  0xe68(%rip),%xmm0
movsd  0xe68(%rip),%xmm1
mov    %rbx,%rdi
mov    $0x2,%al
call   1040 <printf@plt>
movsd  0xe5e(%rip),%xmm0
movsd  0xe5e(%rip),%xmm1
mov    %rbx,%rdi
mov    $0x2,%al
call   1040 <printf@plt>
movsd  0xe54(%rip),%xmm0
movsd  0xe54(%rip),%xmm1
mov    %rbx,%rdi
mov    $0x2,%al
call   1040 <printf@plt>
movsd  0xe4a(%rip),%xmm0
movsd  0xe4a(%rip),%xmm1
mov    %rbx,%rdi
mov    $0x2,%al
call   1040 <printf@plt>
movsd  0xe40(%rip),%xmm0
mov    %rbx,%rdi
movsd  0xdf5(%rip),%xmm1
mov    $0x2,%al
call   1040 <printf@plt>
movsd  0xe2e(%rip),%xmm0
movsd  0xe2e(%rip),%xmm1
mov    %rbx,%rdi
mov    $0x2,%al
call   1040 <printf@plt>
movsd  0xe24(%rip),%xmm0
movsd  0xe24(%rip),%xmm1
mov    %rbx,%rdi
mov    $0x2,%al
call   1040 <printf@plt>
movsd  0xe1a(%rip),%xmm1
xorps  %xmm0,%xmm0
mov    %rbx,%rdi
mov    $0x2,%al
call   1040 <printf@plt>
mov    0x2cfe(%rip),%rax
mov    (%rax),%eax
pop    %rbx
ret

LLVM IR (-O0):
@.str = [12 x i8] c" F C \0A\00"
@.str.1 = [12 x i8] c"----------\0A\00"
@.str.2 = [13 x i8] c"%3.0f %6.1f\0A\00"
@EXIT_SUCCESS = global i32 0
define i32 @main() {
%1 = alloca i32
%2 = alloca float
%3 = alloca float
%4 = alloca i32
%5 = alloca i32
%6 = alloca i32
store i32 0, i32* %1
store i32 0, i32* %4
store i32 300, i32* %5
store i32 20, i32* %6
%7 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str, i64 0, i64 0))
%8 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str.1, i64 0, i64 0))
%9 = load i32, i32* %5
%10 = sitofp i32 %9 to float
store float %10, float* %3
br label %11
11: ; preds = %29, %0
%12 = load i32, i32* %5
%13 = load i32, i32* %4
%14 = icmp sge i32 %12, %13
br i1 %14, label %15, label %33
15: ; preds = %11
%16 = load float, float* %3
%17 = fpext float %16 to double
%18 = call double @llvm.fmuladd.f64(double %17, double 1.800000e+00, double 3.200000e+01)
%19 = fptrunc double %18 to float
store float %19, float* %2
%20 = load float, float* %3
%21 = fpext float %20 to double
%22 = load float, float* %2
%23 = fpext float %22 to double
%24 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([13 x i8], [13 x i8]* @.str.2, i64 0, i64 0), double %21, double %23)
%25 = load i32, i32* %6
%26 = sitofp i32 %25 to float
%27 = load float, float* %3
%28 = fsub float %27, %26
store float %28, float* %3
br label %29
29: ; preds = %15
%30 = load i32, i32* %6
%31 = load i32, i32* %5
%32 = sub nsw i32 %31, %30
store i32 %32, i32* %5
br label %11
33: ; preds = %11
%34 = load i32, i32* @EXIT_SUCCESS
ret i32 %34
}

LLVM IR (-O2):
@.str.2 = [13 x i8] c"%3.0f %6.1f\0A\00"
@EXIT_SUCCESS = global i32 0
@str = [11 x i8] c" F C \00"
@str.3 = [11 x i8] c"----------\00"
define i32 @main() {
%1 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([11 x i8], [11 x i8]* @str, i64 0, i64 0))
%2 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([11 x i8], [11 x i8]* @str.3, i64 0, i64 0))
%3 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str.2, i64 0, i64 0), double 3.000000e+02, double 5.720000e+02)
%4 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str.2, i64 0, i64 0), double 2.800000e+02, double 5.360000e+02)
%5 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str.2, i64 0, i64 0), double 2.600000e+02, double 5.000000e+02)
%6 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str.2, i64 0, i64 0), double 2.400000e+02, double 4.640000e+02)
%7 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str.2, i64 0, i64 0), double 2.200000e+02, double 4.280000e+02)
%8 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str.2, i64 0, i64 0), double 2.000000e+02, double 3.920000e+02)
%9 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str.2, i64 0, i64 0), double 1.800000e+02, double 3.560000e+02)
%10 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str.2, i64 0, i64 0), double 1.600000e+02, double 3.200000e+02)
%11 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str.2, i64 0, i64 0), double 1.400000e+02, double 2.840000e+02)
%12 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str.2, i64 0, i64 0), double 1.200000e+02, double 2.480000e+02)
%13 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str.2, i64 0, i64 0), double 1.000000e+02, double 2.120000e+02)
%14 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str.2, i64 0, i64 0), double 8.000000e+01, double 1.760000e+02)
%15 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str.2, i64 0, i64 0), double 6.000000e+01, double 1.400000e+02)
%16 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str.2, i64 0, i64 0), double 4.000000e+01, double 1.040000e+02)
%17 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str.2, i64 0, i64 0), double 2.000000e+01, double 6.800000e+01)
%18 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str.2, i64 0, i64 0), double 0.000000e+00, double 3.200000e+01)
%19 = load i32, i32* @EXIT_SUCCESS
ret i32 %19
}