From 9e09767e23a4edb6b31540195bfe885f83e080d7 Mon Sep 17 00:00:00 2001 From: bd Date: Tue, 28 Jan 2025 14:39:47 -0500 Subject: [Ongoing] Rewrite frontend to use Flex/Bison This is a merge of another experiment, so the changes are large: - separated "modules" directory into frontend/backend - adjusted module names and moved files for this to happen - removed modules lexer & parser - removed all the unit tests (most were outdated) - added Bison, flex, and C development tools to manifest.scm - added lexer.l, a source file used by the flex utility with a functioning lexing implementation - added parser.y, a source file used by the bison utility with a functioning parser implementation - added node.c and node.h, which parser.y uses to construct an AST of a C source file (up to binary ops) - added driver.c, a Guile-C interface that provides a module to scheme programs - added a Makefile to make all of this - added stuff to .gitignore --- src/backend/ast/ir.scm | 50 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 50 insertions(+) create mode 100644 src/backend/ast/ir.scm (limited to 'src/backend/ast') diff --git a/src/backend/ast/ir.scm b/src/backend/ast/ir.scm new file mode 100644 index 0000000..102739c --- /dev/null +++ b/src/backend/ast/ir.scm @@ -0,0 +1,50 @@ +(define-module (backend ast ir) + #:export (prog + srout + neg + not + mov + stack + reg + imm + tmp + ret)) + +;;; Commentary: +;;; +;;; Nodes which exist to do nothing when evaluated. +;;; +;;; Code: + +(define (ir-node type . args) + (cons type args)) + +(define (prog func) + (ir-node 'prog func)) + +(define (srout label instrs) + (ir-node 'srout label instrs)) + +(define (neg dst) + (ir-node 'neg dst)) + +(define (not dst) + (ir-node 'not dst)) + +(define (mov src dst) + (ir-node 'mov src dst)) + +(define (stack val) + (ir-node 'stack val)) + +(define (reg val) + (ir-node 'reg val)) + +(define (imm val) + (ir-node 'imm val)) + +(define (tmp num) + (ir-node 'tmp num)) + +(define (ret) + (ir-node 'ret)) -- cgit v1.2.3