#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 main() {
  int fahr;
  printf("华氏温度-摄氏温度对照表\n");
  for (fahr = 300; fahr >= 0; fahr = fahr - 20) {
    printf("%3d %6.1f\n", fahr, (5.0 / 9.0) * (fahr - 32));
  }
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xee2(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
movl   $0x12c,-0x8(%rbp)
cmpl   $0x0,-0x8(%rbp)
jl     1173 <main+0x63>
mov    -0x8(%rbp),%esi
mov    -0x8(%rbp),%eax
sub    $0x20,%eax
cvtsi2sd %eax,%xmm1
movsd  0xead(%rip),%xmm0
mulsd  %xmm1,%xmm0
lea    0xece(%rip),%rdi
mov    $0x1,%al
call   1030 <printf@plt>
mov    -0x8(%rbp),%eax
sub    $0x14,%eax
mov    %eax,-0x8(%rbp)
jmp    1134 <main+0x24>
mov    -0x4(%rbp),%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
lea    0xf63(%rip),%rdi
call   1030 <puts@plt>
lea    0xf4c(%rip),%rbx
movsd  0xec4(%rip),%xmm0
mov    %rbx,%rdi
mov    $0x12c,%esi
mov    $0x1,%al
call   1040 <printf@plt>
movsd  0xeb5(%rip),%xmm0
mov    %rbx,%rdi
mov    $0x118,%esi
mov    $0x1,%al
call   1040 <printf@plt>
movsd  0xea6(%rip),%xmm0
mov    %rbx,%rdi
mov    $0x104,%esi
mov    $0x1,%al
call   1040 <printf@plt>
movsd  0xe97(%rip),%xmm0
mov    %rbx,%rdi
mov    $0xf0,%esi
mov    $0x1,%al
call   1040 <printf@plt>
movsd  0xe88(%rip),%xmm0
mov    %rbx,%rdi
mov    $0xdc,%esi
mov    $0x1,%al
call   1040 <printf@plt>
movsd  0xe79(%rip),%xmm0
mov    %rbx,%rdi
mov    $0xc8,%esi
mov    $0x1,%al
call   1040 <printf@plt>
movsd  0xe6a(%rip),%xmm0
mov    %rbx,%rdi
mov    $0xb4,%esi
mov    $0x1,%al
call   1040 <printf@plt>
movsd  0xe5b(%rip),%xmm0
mov    %rbx,%rdi
mov    $0xa0,%esi
mov    $0x1,%al
call   1040 <printf@plt>
movsd  0xe4c(%rip),%xmm0
mov    %rbx,%rdi
mov    $0x8c,%esi
mov    $0x1,%al
call   1040 <printf@plt>
movsd  0xe3d(%rip),%xmm0
mov    %rbx,%rdi
mov    $0x78,%esi
mov    $0x1,%al
call   1040 <printf@plt>
movsd  0xe2e(%rip),%xmm0
mov    %rbx,%rdi
mov    $0x64,%esi
mov    $0x1,%al
call   1040 <printf@plt>
movsd  0xe1f(%rip),%xmm0
mov    %rbx,%rdi
mov    $0x50,%esi
mov    $0x1,%al
call   1040 <printf@plt>
movsd  0xe10(%rip),%xmm0
mov    %rbx,%rdi
mov    $0x3c,%esi
mov    $0x1,%al
call   1040 <printf@plt>
movsd  0xe01(%rip),%xmm0
mov    %rbx,%rdi
mov    $0x28,%esi
mov    $0x1,%al
call   1040 <printf@plt>
movsd  0xdf2(%rip),%xmm0
mov    %rbx,%rdi
mov    $0x14,%esi
mov    $0x1,%al
call   1040 <printf@plt>
movsd  0xde3(%rip),%xmm0
mov    %rbx,%rdi
xor    %esi,%esi
mov    $0x1,%al
call   1040 <printf@plt>
xor    %eax,%eax
pop    %rbx
ret

LLVM IR (-O0):
@.str = [36 x i8] c"\E5\8D\8E\E6\B0\8F\E6\B8\A9\E5\BA\A6-\E6\91\84\E6\B0\8F\E6\B8\A9\E5\BA\A6\E5\AF\B9\E7\85\A7\E8\A1\A8\0A\00"
@.str.1 = [11 x i8] c"%3d %6.1f\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
store i32 0, i32* %1
%3 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([36 x i8], [36 x i8]* @.str, i64 0, i64 0))
store i32 300, i32* %2
br label %4
4: ; preds = %14, %0
%5 = load i32, i32* %2
%6 = icmp sge i32 %5, 0
br i1 %6, label %7, label %17
7: ; preds = %4
%8 = load i32, i32* %2
%9 = load i32, i32* %2
%10 = sub nsw i32 %9, 32
%11 = sitofp i32 %10 to double
%12 = fmul double 0x3FE1C71C71C71C72, %11
%13 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str.1, i64 0, i64 0), i32 %8, double %12)
br label %14
14: ; preds = %7
%15 = load i32, i32* %2
%16 = sub nsw i32 %15, 20
store i32 %16, i32* %2
br label %4
17: ; preds = %4
%18 = load i32, i32* %1
ret i32 %18
}

LLVM IR (-O2):
@.str.1 = [11 x i8] c"%3d %6.1f\0A\00"
@str = [35 x i8] c"\E5\8D\8E\E6\B0\8F\E6\B8\A9\E5\BA\A6-\E6\91\84\E6\B0\8F\E6\B8\A9\E5\BA\A6\E5\AF\B9\E7\85\A7\E8\A1\A8\00"
define i32 @main() {
%1 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([35 x i8], [35 x i8]* @str, i64 0, i64 0))
%2 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([11 x i8], [11 x i8]* @.str.1, i64 0, i64 0), i32 300, double 0x40629C71C71C71C7)
%3 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([11 x i8], [11 x i8]* @.str.1, i64 0, i64 0), i32 280, double 0x406138E38E38E38E)
%4 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([11 x i8], [11 x i8]* @.str.1, i64 0, i64 0), i32 260, double 0x405FAAAAAAAAAAAB)
%5 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([11 x i8], [11 x i8]* @.str.1, i64 0, i64 0), i32 240, double 0x405CE38E38E38E39)
%6 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([11 x i8], [11 x i8]* @.str.1, i64 0, i64 0), i32 220, double 0x405A1C71C71C71C7)
%7 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([11 x i8], [11 x i8]* @.str.1, i64 0, i64 0), i32 200, double 0x4057555555555556)
%8 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([11 x i8], [11 x i8]* @.str.1, i64 0, i64 0), i32 180, double 0x40548E38E38E38E4)
%9 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([11 x i8], [11 x i8]* @.str.1, i64 0, i64 0), i32 160, double 0x4051C71C71C71C72)
%10 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([11 x i8], [11 x i8]* @.str.1, i64 0, i64 0), i32 140, double 6.000000e+01)
%11 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([11 x i8], [11 x i8]* @.str.1, i64 0, i64 0), i32 120, double 0x404871C71C71C71D)
%12 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([11 x i8], [11 x i8]* @.str.1, i64 0, i64 0), i32 100, double 0x4042E38E38E38E39)
%13 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([11 x i8], [11 x i8]* @.str.1, i64 0, i64 0), i32 80, double 0x403AAAAAAAAAAAAB)
%14 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([11 x i8], [11 x i8]* @.str.1, i64 0, i64 0), i32 60, double 0x402F1C71C71C71C8)
%15 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([11 x i8], [11 x i8]* @.str.1, i64 0, i64 0), i32 40, double 0x4011C71C71C71C72)
%16 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([11 x i8], [11 x i8]* @.str.1, i64 0, i64 0), i32 20, double 0xC01AAAAAAAAAAAAB)
%17 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([11 x i8], [11 x i8]* @.str.1, i64 0, i64 0), i32 0, double 0xC031C71C71C71C72)
ret i32 0
}