maekawatoshiki

To remove a submodule you need to:

• Delete the relevant section from the .gitmodules file.
• Stage the .gitmodules changes git add .gitmodules
• Delete the relevant section from .git/config.
  • git config -f .git/config --remove-section submodule.サブモジュールのパス
• Run git rm --cached path_to_submodule (no trailing slash).
• Run rm -rf .git/modules/path_to_submodule (no trailing slash).
• Commit git commit -m "Removed submodule "
• Delete the now untracked submodule files rm -rf path_to_submodule

maekawatoshiki

\documentclass{article}

\usepackage{array}

\newcolumntype{L}[1]{>{\raggedright\let\newline\\\arraybackslash\hspace{0pt}}m{#1}}
\newcolumntype{C}[1]{>{\centering\let\newline\\\arraybackslash\hspace{0pt}}m{#1}}
\newcolumntype{R}[1]{>{\raggedleft\let\newline\\\arraybackslash\hspace{0pt}}m{#1}}

\begin{document}

maekawatoshiki

Floating Point Arcade

![Twitter Follow][twitter]

A Shady Coin Toss

A shady game master approaches...

Hey there! You look like you would enjoy a good game of chance.

maekawatoshiki

; ModuleID = 'c.c'
source_filename = "c.c"
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-pc-linux-gnu"

%struct.termios = type { i32, i32, i32, i32, i8, [32 x i8], i32, i32 }
%struct.game = type { [4 x [4 x i32]] }

@.str = private unnamed_addr constant [28 x i8] c"--------------------------\0A\00", align 1
@.str.1 = private unnamed_addr constant [2 x i8] c"|\00", align 1

maekawatoshiki

function AVLTree() {
  this.kind = "empty";
  this.depth = 0;

  this.insert = function(val) {
    if (this.kind == "empty") {
      this.kind = "val";
      this.val = val;
      this.depth = 1;
    } else if (this.kind == "val") {

maekawatoshiki

• test.ll

; void test(int arr[10][10][10], int x) {
;   for (int k = 0; k < 10; k++) 
;     for (int j = 0; j < 10; j++) 
;       for (int i = 0; i < 10; i++) 
;         arr[i][k][j] += x * 2;
; }

maekawatoshiki

何がわからないのか

common subexpression elimination や loop invariant code motion を行うと， getelementptr が，本来含まれていた基本ブロックの外へと移動することがある．

一見問題なさそうだが，場合によっては生成される命令数が増える．(これは自作コンパイラ基盤の実装上の問題)

例

次のコードは，

maekawatoshiki

diff --git a/library/std/src/sys/hermit/alloc.rs b/library/std/src/sys/hermit/alloc.rs
index d153914e77e..04446172197 100644
--- a/library/std/src/sys/hermit/alloc.rs
+++ b/library/std/src/sys/hermit/alloc.rs
@@ -1,3 +1,5 @@
+#![deny(unsafe_op_in_unsafe_fn)]
+
 use crate::alloc::{GlobalAlloc, Layout, System};
 use crate::ptr;
 use crate::sys::hermit::abi;

maekawatoshiki

package main

import (
	"fmt"
	"unicode"
	"unicode/utf8"
)

type NodeKind int

maekawatoshiki

#include <iostream>
#include <string>
#include <stack>
#include <memory>
#include <sstream>

class Node {
public: 
  virtual std::string to_string() = 0;
  virtual double eval() = 0;