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schedule_parser.cpp
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189 lines (179 loc) · 6.97 KB
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#include <string>
#include <vector>
#include <iostream>
#include "taco/parser/lexer.h"
#include "taco/parser/schedule_parser.h"
#include "taco/error.h"
using std::vector;
using std::string;
using std::cout;
using std::endl;
namespace taco{
namespace parser{
/// Parses command line schedule directives (`-s <directive>`).
/// Example: "precompute(B(i,j),j,jpre),reorder(j,i)" is parsed as:
/// [ [ "precompute", "B(i,j)", "j", "jpre" ],
/// [ "reorder", "j", "i" ] ]
/// The first element of each inner vector is the function name.
/// Inner parens are preserved. All whitespace is removed.
vector<vector<string>> ScheduleParser(const string argValue) {
int parenthesesCnt;
vector<vector<string>> parsed;
vector<string> current_schedule;
string current_element;
parser::Lexer lexer(argValue);
parser::Token tok;
parenthesesCnt = 0;
int curlyParenthesesCnt = 0;
for(tok = lexer.getToken(); tok != parser::Token::eot; tok = lexer.getToken()) {
switch(tok) {
case parser::Token::lparen:
if(parenthesesCnt == 0) {
// The first opening paren separates the name of the scheduler directive from its first parameter
current_schedule.push_back(current_element);
current_element = "";
}
else {
// pass inner parens through to the scheduler
current_element += lexer.tokenString(tok);
}
parenthesesCnt++;
break;
case parser::Token::rparen:
taco_uassert(parenthesesCnt > 0) << "mismatched parentheses"
"(too many right-parens, negative nesting level) "
"in schedule expression '" << argValue << "'";
if(parenthesesCnt > 1)
current_element += lexer.tokenString(tok);
parenthesesCnt--;
break;
case parser::Token::comma:
if (curlyParenthesesCnt > 0) {
// multiple indexes inside of a {} list; pass it through
current_element += lexer.tokenString(tok);
} else if(parenthesesCnt == 0) {
// new schedule directive
current_schedule.push_back(current_element);
parsed.push_back(current_schedule);
current_schedule.clear();
current_element = "";
} else if(parenthesesCnt == 1) {
// new parameter to schedule directive
current_schedule.push_back(current_element);
current_element = "";
} else {
// probably multiple indexes inside of an IndexExpr; pass it through
current_element += lexer.tokenString(tok);
break;
}
break;
case parser::Token::lcurly:
// Keep track of curly brackets for list arguments
current_element += lexer.tokenString(tok);
curlyParenthesesCnt++;
break;
case parser::Token::rcurly:
taco_uassert(curlyParenthesesCnt > 0) << "mismatched curly parentheses "
"(too many right-curly-parens, negative nesting level)"
" in schedule expression '" << argValue << "'";
current_element += lexer.tokenString(tok);
curlyParenthesesCnt--;
break;
// things where .getIdentifier() makes sense
case parser::Token::identifier:
case parser::Token::int_scalar:
case parser::Token::uint_scalar:
case parser::Token::float_scalar:
case parser::Token::complex_scalar:
current_element += lexer.getIdentifier();
break;
// .tokenstring() works for the remaining cases
default:
current_element += lexer.tokenString(tok);
break;
}
}
taco_uassert(parenthesesCnt == 0) << "imbalanced parentheses (too few right-parens) "
"in schedule expression '" << argValue << "'";
if(current_element.length() > 0)
current_schedule.push_back(current_element);
if(current_schedule.size() > 0)
parsed.push_back(current_schedule);
return parsed;
}
/// Parses command line lists for the scheduling directive 'precompute(expr, i_vars, iw_vars)'
/// The lists are used for i_vars and iw_vars
vector<string> varListParser(const string argValue) {
vector<string> parsed;
string current_element;
parser::Lexer lexer(argValue);
parser::Token tok;
int curlyParenthesesCnt = 0;
for(tok = lexer.getToken(); tok != parser::Token::eot; tok = lexer.getToken()) {
switch(tok) {
case parser::Token::comma:
if (curlyParenthesesCnt > 0) {
// multiple indexes inside of a {} list; pass it through
parsed.push_back(current_element);
current_element = "";
} else {
// probably multiple indexes inside of an IndexExpr; pass it through
current_element += lexer.tokenString(tok);
break;
}
break;
case parser::Token::lcurly:
// Keep track of curly brackets for list arguments
current_element = "";
curlyParenthesesCnt++;
break;
case parser::Token::rcurly:
taco_uassert(curlyParenthesesCnt > 0) << "mismatched curly parentheses "
"(too many right-curly-parens, negative nesting level)"
" in schedule expression '" << argValue << "'";
if (curlyParenthesesCnt == 1) {
parsed.push_back(current_element);
current_element = "";
}
curlyParenthesesCnt--;
break;
case parser::Token::lparen:
// ignore parenthesis
break;
case parser::Token::rparen:
// ignore parenthesis
break;
// things where .getIdentifier() makes sense
case parser::Token::identifier:
case parser::Token::int_scalar:
case parser::Token::uint_scalar:
case parser::Token::float_scalar:
case parser::Token::complex_scalar:
current_element += lexer.getIdentifier();
break;
// .tokenstring() works for the remaining cases
default:
current_element += lexer.tokenString(tok);
break;
}
}
taco_uassert(curlyParenthesesCnt == 0) << "imbalanced curly brackets (too few right-curly brackets) "
"in schedule expression '" << argValue << "'";
if(current_element.length() > 0)
parsed.push_back(current_element);
return parsed;
}
string serializeParsedSchedule(vector<vector<string>> parsed) {
std::stringstream ss;
ss << "[ ";
for(vector<string> current_schedule : parsed) {
ss << "[ ";
for(string element : current_schedule) {
ss << "'" << element << "', ";
}
ss << "], ";
}
ss << "]";
return ss.str();
}
}}