Remove BFtoLLVM. It was old, and a poor example because it didn't use best practices for making

a LLVM frontend in C++.  Maybe someday it will be rewritten..


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37858 91177308-0d34-0410-b5e6-96231b3b80d8

6 files changed, 1 insertions, 274 deletions

diff --git a/examples/BFtoLLVM/BFtoLLVM.cpp b/examples/BFtoLLVM/BFtoLLVM.cpp
deleted file mode 100644
index a85ef24537..0000000000
--- a/examples/BFtoLLVM/BFtoLLVM.cpp
+++ /dev/null
@@ -1,209 +0,0 @@
-//===-- BFtoLLVM.cpp - BF language Front End for LLVM ---------------------===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file was developed by the LLVM research group and is distributed under
-// the University of Illinois Open Source License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This is a simple front end for the BF language.  It is compatible with the
-// language as described in "The BrainF*** Language Specification (01 January
-// 2002)", which is available from http://esoteric.sange.fi/ENSI . It does not
-// implement the optional keyword # ("Output partial tape state").
-//
-//===----------------------------------------------------------------------===//
-
-#include <iostream>
-#include <vector>
-#include <fstream>
-#include <cerrno>
-#include <cstring>
-#include <string>
-#include <cstdio>
-#include <cassert>
-
-void emitDeclarations(std::ofstream &dest) {
-  dest << "; This assembly code brought to you by BFtoLLVM\n"
-       << "\nimplementation\n"
-       << "\n; Declarations\n"
-       << "\ndeclare int %getchar()\n"
-       << "declare int %putchar(int)\n"
-       << "declare void %llvm.memset.i32(sbyte*, ubyte, uint, uint)\n"
-       << "\n";
-}
-
-void emitMainFunctionProlog(std::ofstream &dest) {
-  dest << "\n; Main function\n"
-       << "int %main(int %argc, sbyte** %argv) {\n"
-       << "\nentry:\n"
-       << "%arr = alloca sbyte, uint 30000\n"
-       << "call void (sbyte*, ubyte, uint, uint)* %llvm.memset.i32"
-       << "(sbyte* %arr, ubyte 0, uint 30000, uint 1)\n"
-       << "%ptrbox = alloca sbyte*\n"
-       << "store sbyte* %arr, sbyte **%ptrbox\n"
-       << "\n";
-}
-
-void emitMainFunctionEpilog(std::ofstream &dest) {
-  dest << "ret int 0\n"
-       << "}\n";
-}
-
-std::string gensym (const std::string varName, bool percent = true) {
-  char buf[80];
-  static unsigned int SymbolCounter = 0;
-  sprintf (buf, "%s%s%u", percent ? "%" : "", varName.c_str(), SymbolCounter++);
-  return std::string (buf);
-}
-
-void emitArith (std::string op, char delta, std::ofstream &dest) {
-  std::string ptr = gensym (op + "ptr"),
-              val = gensym (op + "val"),
-              result = gensym (op + "result");
-  dest << ptr << " = load sbyte** %ptrbox\n"
-       << val << " = load sbyte* " << ptr << "\n"
-       << result << " = add sbyte " << val << ", " << (int)delta << "\n"
-       << "store sbyte " << result << ", sbyte* " << ptr << "\n";
-}
-
-// + becomes ++*p; and - becomes --*p;
-void emitPlus  (std::ofstream &dest, int ct) { emitArith ("plus",  +ct, dest); }
-void emitMinus (std::ofstream &dest, int ct) { emitArith ("minus", -ct, dest); }
-
-void emitLoadAndCast (std::string ptr, std::string val, std::string cast,
-                      std::string type, std::ofstream &dest) {
-  dest << ptr << " = load sbyte** %ptrbox\n"
-       << val << " = load sbyte* " << ptr << "\n"
-       << cast << " = cast sbyte " << val << " to " << type << "\n";
-}
-
-// , becomes *p = getchar();
-void emitComma(std::ofstream &dest, int ct) {
-  assert (ct == 1);
-  std::string ptr = gensym("commaptr"), read = gensym("commaread"),
-              cast = gensym("commacast");
-  dest << ptr << " = load sbyte** %ptrbox\n"
-       << read << " = call int %getchar()\n"
-       << cast << " = cast int " << read << " to sbyte\n"
-       << "store sbyte " << cast << ", sbyte* " << ptr << "\n";
-}
-
-// . becomes putchar(*p);
-void emitDot(std::ofstream &dest, int ct) {
-  assert (ct == 1);
-  std::string ptr = gensym("dotptr"), val = gensym("dotval"),
-              cast = gensym("dotcast");
-  emitLoadAndCast (ptr, val, cast, "int", dest);
-  dest << "call int %putchar(int " << cast << ")\n";
-}
-
-void emitPointerArith(std::string opname, int delta, std::ofstream &dest) {
-  std::string ptr = gensym(opname + "ptr"), result = gensym(opname + "result");
-  dest << ptr << " = load sbyte** %ptrbox\n"
-       << result << " = getelementptr sbyte* " << ptr << ", int " << delta
-       << "\n"
-       << "store sbyte* " << result << ", sbyte** %ptrbox\n";
-}
-
-// < becomes --p; and > becomes ++p;
-void emitLT(std::ofstream &dest, int ct) { emitPointerArith ("lt", -ct, dest); }
-void emitGT(std::ofstream &dest, int ct) { emitPointerArith ("gt", +ct, dest); }
-
-static std::vector<std::string> whileStack;
-
-// [ becomes while (*p) {
-void emitLeftBracket(std::ofstream &dest, int ct) {
-  assert (ct == 1);
-  std::string whileName = gensym ("While", false);
-  whileStack.push_back (whileName);
-  dest << "br label %testFor" << whileName << "\n"
-       << "\ninside" << whileName << ":\n";
-}
-
-// ] becomes }
-void emitRightBracket(std::ofstream &dest, int ct) {
-  assert (ct == 1);
-  std::string whileName = whileStack.back (),
-              ptr = gensym("bracketptr"),
-              val = gensym("bracketval"),
-              cast = gensym("bracketcast");
-  whileStack.pop_back ();
-  dest << "br label %testFor" << whileName << "\n"
-       << "\ntestFor" << whileName << ":\n";
-  emitLoadAndCast (ptr, val, cast, "bool", dest);
-  dest << "br bool " << cast << ", label %inside" << whileName << ", "
-       << "label %after" << whileName << "\n"
-       << "\nafter" << whileName << ":\n";
-}
-
-typedef void (*FuncTy)(std::ofstream &, int);
-static FuncTy table[256];
-static bool multi[256];
-
-void consume (int ch, int repeatCount, std::ofstream &dest) {
-  FuncTy func = table[ch];
-  if (!func)
-    return;
-  else if (multi[ch])
-    func (dest, repeatCount);
-  else
-    for (int i = 0; i < repeatCount; ++i)
-      func (dest, 1);
-}
-
-void initializeTable() {
-  memset (table, 0, 256);
-  memset (multi, 0, 256);
-  table[(int)'+'] = emitPlus;          multi[(int)'+'] = true;
-  table[(int)'-'] = emitMinus;         multi[(int)'-'] = true;
-  table[(int)','] = emitComma;         multi[(int)','] = false;
-  table[(int)'.'] = emitDot;           multi[(int)'.'] = false;
-  table[(int)'<'] = emitLT;            multi[(int)'<'] = true;
-  table[(int)'>'] = emitGT;            multi[(int)'>'] = true;
-  table[(int)'['] = emitLeftBracket;   multi[(int)'['] = false;
-  table[(int)']'] = emitRightBracket;  multi[(int)']'] = false;
-}
-
-int main (int argc, char **argv) {
-  if (argc != 3) {
-    std::cerr << "usage: " << argv[0] << " input-source output-llvm\n";
-    return 1;
-  }
-
-  char *sourceFileName = argv[1];
-  char *destFileName = argv[2];
-
-  std::ifstream src (sourceFileName);
-  if (!src.good()) {
-    std::cerr << sourceFileName << ": " << strerror(errno) << "\n";
-    return 1;
-  }
-
-  std::ofstream dest (destFileName);
-  if (!dest.good()) {
-    std::cerr << destFileName << ": " << strerror(errno) << "\n";
-    return 1;
-  }
-
-  emitDeclarations(dest);
-  emitMainFunctionProlog(dest);
-
-  initializeTable();
-  char ch, lastCh;
-  src >> lastCh;
-  int repeatCount = 1;
-  for (src >> ch; !src.eof (); src >> ch, ++repeatCount)
-    if (ch != lastCh) {
-      consume (lastCh, repeatCount, dest);
-      lastCh = ch;
-      repeatCount = 0;
-    }
-  consume (lastCh, repeatCount, dest);
-
-  emitMainFunctionEpilog(dest);
-
-  src.close();
-  dest.close();
-  return 0;
-}
diff --git a/examples/BFtoLLVM/Makefile b/examples/BFtoLLVM/Makefile
deleted file mode 100644
index 0b4c429a39..0000000000
--- a/examples/BFtoLLVM/Makefile
+++ /dev/null
@@ -1,13 +0,0 @@
-##===- examples/BFtoLLVM/Makefile --------------------------*- Makefile -*-===##
-#
-#                     The LLVM Compiler Infrastructure
-#
-# This file was developed by the LLVM research group and is distributed under
-# the University of Illinois Open Source License. See LICENSE.TXT for details.
-#
-##===----------------------------------------------------------------------===##
-
-LEVEL = ../..
-TOOLNAME = BFtoLLVM
-EXAMPLE_TOOL = 1
-include $(LEVEL)/Makefile.common
diff --git a/examples/BFtoLLVM/tests/Makefile b/examples/BFtoLLVM/tests/Makefile
deleted file mode 100644
index ff3d01a2e2..0000000000
--- a/examples/BFtoLLVM/tests/Makefile
+++ /dev/null
@@ -1,45 +0,0 @@
-##===- examples/BFtoLLVM/tests/Makefile --------------------*- Makefile -*-===##
-#
-#                     The LLVM Compiler Infrastructure
-#
-# This file was developed by the LLVM research group and is distributed under
-# the University of Illinois Open Source License. See LICENSE.TXT for details.
-#
-##===----------------------------------------------------------------------===##
-
-# Makefile for bf2llvm tests.
-
-LEVEL = ../../..
-BFTOLLVM = $(LLVMTOOLCURRENT)/BFtoLLVM
-
-include $(LEVEL)/Makefile.common
-
-all:: check
-
-clean::
-	rm -rf Output
-
-.SUFFIXES: .ll .gccas.bc .llvm .cbe.c .cbe
-
-Output/%.ll: %.b $(BFTOLLVM) Output/.dir
-	$(BFTOLLVM) $< $@
-
-Output/%.gccas.bc: Output/%.ll Output/.dir
-	$(LGCCAS) $< -o $@
-
-Output/%.llvm Output/%.llvm.bc: Output/%.gccas.bc Output/.dir
-	$(LGCCLD) $< -lc -lcrtend -o Output/$*.llvm
-
-Output/%.cbe.c: Output/%.llvm.bc Output/.dir
-	$(LLC) -march=c -f -o=$@ $<
-
-Output/%.cbe: Output/%.cbe.c Output/.dir
-	$(CC) -O2 $< -o $@
-
-check: Output/hello.cbe hello.expected-out
-	@echo "Running test"
-	Output/hello.cbe > Output/hello.out-cbe
-	@echo "Checking result"
-	diff Output/hello.out-cbe hello.expected-out
-	@echo "Test passed"
-
diff --git a/examples/BFtoLLVM/tests/hello.b b/examples/BFtoLLVM/tests/hello.b
deleted file mode 100644
index a3d8faf841..0000000000
--- a/examples/BFtoLLVM/tests/hello.b
+++ /dev/null
@@ -1,5 +0,0 @@
-Hello World program
->+++++++++[<++++++++>-]<.>+++++++[<++++>-]<+.+++++++..+++.[-]>++++++++[<++++>-]
-<.#>+++++++++++[<+++++>-]<.>++++++++[<+++>-]<.+++.------.--------.[-]>++++++++[
-<++++>-]<+.[-]++++++++++.
-
diff --git a/examples/BFtoLLVM/tests/hello.expected-out b/examples/BFtoLLVM/tests/hello.expected-out
deleted file mode 100644
index 980a0d5f19..0000000000
--- a/examples/BFtoLLVM/tests/hello.expected-out
+++ /dev/null
@@ -1 +0,0 @@
-Hello World!
diff --git a/examples/Makefile b/examples/Makefile
index 873c5825ab..d96f66cdaf 100644
--- a/examples/Makefile
+++ b/examples/Makefile
@@ -10,7 +10,7 @@ LEVEL=..
 
 include $(LEVEL)/Makefile.config
 
-PARALLEL_DIRS:= Fibonacci HowToUseJIT ModuleMaker BFtoLLVM
+PARALLEL_DIRS:= Fibonacci HowToUseJIT ModuleMaker
 
 ifeq ($(HAVE_PTHREAD),1)
 PARALLEL_DIRS += ParallelJIT