#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*/ putchar(char);
int /*<<< orphan*/ scanf(char *, int *);
int main(void) {
  int i, j, ln;
  printf("三角形有几层;");
  scanf("%d", &ln);
  for (i = 1; i <= ln; i++) {
    for (j = 1; j <= i; j++)
      putchar('*');
    putchar('\n');
  }
  return (0);
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xeba(%rip),%rdi
call   1040 <printf@plt>
lea    0xec2(%rip),%rdi
lea    -0x10(%rbp),%rsi
call   1050 <scanf@plt>
movl   $0x1,-0x8(%rbp)
mov    -0x8(%rbp),%eax
cmp    -0x10(%rbp),%eax
jg     11b1 <main+0x81>
movl   $0x1,-0xc(%rbp)
mov    -0xc(%rbp),%eax
cmp    -0x8(%rbp),%eax
jg     1199 <main+0x69>
mov    $0x2a,%edi
call   1030 <putchar@plt>
mov    -0xc(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0xc(%rbp)
jmp    1175 <main+0x45>
mov    $0xa,%edi
call   1030 <putchar@plt>
mov    -0x8(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x8(%rbp)
jmp    1162 <main+0x32>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbp
push   %rbx
push   %rax
lea    0xec6(%rip),%rdi
call   1040 <printf@plt>
lea    0xece(%rip),%rdi
lea    0x4(%rsp),%rsi
call   1050 <scanf@plt>
cmpl   $0x0,0x4(%rsp)
jle    1194 <main+0x64>
mov    $0x1,%ebx
nopl   0x0(%rax)
mov    %ebx,%ebp
cs nopw 0x0(%rax,%rax,1)
nopl   0x0(%rax)
mov    $0x2a,%edi
call   1030 <putchar@plt>
add    $0xffffffff,%ebp
jne    1170 <main+0x40>
mov    $0xa,%edi
call   1030 <putchar@plt>
lea    0x1(%rbx),%eax
cmp    0x4(%rsp),%ebx
mov    %eax,%ebx
jl     1160 <main+0x30>
xor    %eax,%eax
add    $0x8,%rsp
pop    %rbx
pop    %rbp
ret

LLVM IR (-O0):
@.str = [20 x i8] c"\E4\B8\89\E8\A7\92\E5\BD\A2\E6\9C\89\E5\87\A0\E5\B1\82;\00"
@.str.1 = [3 x i8] c"%d\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32
%4 = alloca i32
store i32 0, i32* %1
%5 = call i32 @printf(i8* getelementptr inbounds ([20 x i8], [20 x i8]* @.str, i64 0, i64 0))
%6 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %4)
store i32 1, i32* %2
br label %7
7: ; preds = %23, %0
%8 = load i32, i32* %2
%9 = load i32, i32* %4
%10 = icmp sle i32 %8, %9
br i1 %10, label %11, label %26
11: ; preds = %7
store i32 1, i32* %3
br label %12
12: ; preds = %18, %11
%13 = load i32, i32* %3
%14 = load i32, i32* %2
%15 = icmp sle i32 %13, %14
br i1 %15, label %16, label %21
16: ; preds = %12
%17 = call i32 @putchar(i8 signext 42)
br label %18
18: ; preds = %16
%19 = load i32, i32* %3
%20 = add nsw i32 %19, 1
store i32 %20, i32* %3
br label %12
21: ; preds = %12
%22 = call i32 @putchar(i8 signext 10)
br label %23
23: ; preds = %21
%24 = load i32, i32* %2
%25 = add nsw i32 %24, 1
store i32 %25, i32* %2
br label %7
26: ; preds = %7
ret i32 0
}

LLVM IR (-O2):
@.str = [20 x i8] c"\E4\B8\89\E8\A7\92\E5\BD\A2\E6\9C\89\E5\87\A0\E5\B1\82;\00"
@.str.1 = [3 x i8] c"%d\00"
define i32 @main() {
%1 = alloca i32
%2 = bitcast i32* %1 to i8*
%3 = tail call i32 @printf(i8* dereferenceable(1) getelementptr inbounds ([20 x i8], [20 x i8]* @.str, i64 0, i64 0))
%4 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %1)
%5 = load i32, i32* %1
%6 = icmp slt i32 %5, 1
br i1 %6, label %21, label %7
7: ; preds = %0, %15
%8 = phi i32 [ %20, %15 ], [ 2, %0 ]
%9 = phi i32 [ %17, %15 ], [ 1, %0 ]
br label %10
10: ; preds = %7, %10
%11 = phi i32 [ 1, %7 ], [ %13, %10 ]
%12 = call i32 @putchar(i8 signext 42)
%13 = add nuw i32 %11, 1
%14 = icmp eq i32 %13, %8
br i1 %14, label %15, label %10
15: ; preds = %10
%16 = call i32 @putchar(i8 signext 10)
%17 = add nuw nsw i32 %9, 1
%18 = load i32, i32* %1
%19 = icmp slt i32 %9, %18
%20 = add nuw i32 %8, 1
br i1 %19, label %7, label %21
21: ; preds = %15, %0
ret i32 0
}