From b2997170df7cc2703de714a946a38dc35058e7f8 Mon Sep 17 00:00:00 2001
From: Tim Foley <tfoleyNV@users.noreply.github.com>
Date: Mon, 10 Dec 2018 12:42:15 -0800
Subject: Remove the "VM" and "bytecode" features (#745)

* Remove the "VM" and "bytecode" features

The "bytecode" in `bc.{h,cpp}` was an initial attempt at a serialized encoding for the Slang IR, but we now have the `ir-serialize.{h,cpp}` approach which was has been kept up to date much better.

Similarly, the "VM" in `vm.{h,cpp}` was intended to be a system for interpreting Slang code in the bytecode format directly (so that you could load and evaluate code in a Slang module in a lightweight fashion). This never got used past a single test, which we eventually disabled.

There are good ideas in some of this code, but at this point the implementations have bit-rotted to a point where trying to maintain it is more costly than it would be to re-created it if/when we ever decide these features are important again.

* fixup: remove slang-eval-test from Makefile
---
 tools/slang-eval-test/main.cpp | 139 -----------------------------------------
 1 file changed, 139 deletions(-)
 delete mode 100644 tools/slang-eval-test/main.cpp

(limited to 'tools/slang-eval-test/main.cpp')

diff --git a/tools/slang-eval-test/main.cpp b/tools/slang-eval-test/main.cpp
deleted file mode 100644
index ff2ebed34..000000000
--- a/tools/slang-eval-test/main.cpp
+++ /dev/null
@@ -1,139 +0,0 @@
-// main.cpp
-
-#include <assert.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include "../../source/core/secure-crt.h"
-#include <slang.h>
-
-static SlangResult innerMain(int argc, char*const* argv)
-{
-    // TODO: parse arguments
-
-    assert(argc >= 2);
-    char const* inputPath = argv[1];
-
-    // Slurp in the input file, so that we can compile and run it
-    FILE* inputFile;
-    fopen_s(&inputFile, inputPath, "rb");
-    assert(inputFile);
-
-    fseek(inputFile, 0, SEEK_END);
-    size_t inputSize = ftell(inputFile);
-    fseek(inputFile, 0, SEEK_SET);
-
-    char* inputText = (char*)malloc(inputSize + 1);
-    fread(inputText, inputSize, 1, inputFile);
-    inputText[inputSize] = 0;
-    fclose(inputFile);
-
-    // TODO: scan through the text to find comments,
-    // that instruct us how to generate input and
-    // consume output when running the test.
-
-    //
-
-    SlangSession* session = spCreateSession(nullptr);
-    SlangCompileRequest* request = spCreateCompileRequest(session);
-
-    spSetOutputContainerFormat(
-        request,
-        SLANG_CONTAINER_FORMAT_SLANG_MODULE);
-
-    int translationUnitIndex = spAddTranslationUnit(
-        request,
-        SLANG_SOURCE_LANGUAGE_SLANG,
-        nullptr);
-
-    spAddTranslationUnitSourceString(
-        request,
-        translationUnitIndex,
-        inputPath,
-        inputText);
-
-    int entryPointIndex = spAddEntryPoint(
-        request,
-        translationUnitIndex,
-        "main",
-        spFindProfile(session, "cs_5_0"));
-
-    if (SLANG_FAILED(spCompile(request)))
-    {
-        char const* output = spGetDiagnosticOutput(request);
-        fputs(output, stderr);
-        return SLANG_FAIL;
-    }
-
-    // Things compiled, so now we need to run them...
-
-    // Extract the bytecode
-    size_t bytecodeSize = 0;
-    void const* bytecode = spGetCompileRequestCode(request, &bytecodeSize);
-
-    // Now we need to create an execution context to go and run the bytecode we got
-
-    SlangVM* vm = SlangVM_create();
-
-    SlangVMModule* vmModule = SlangVMModule_load(
-        vm,
-        bytecode,
-        bytecodeSize);
-
-    SlangVMFunc* vmFunc = (SlangVMFunc*)SlangVMModule_findGlobalSymbolPtr(
-        vmModule,
-        "main");
-
-    int32_t*& inputArg = *(int32_t**)SlangVMModule_findGlobalSymbolPtr(
-        vmModule,
-        "input");
-
-    int32_t*& outputArg = *(int32_t**)SlangVMModule_findGlobalSymbolPtr(
-        vmModule,
-        "output");
-
-    SlangVMThread* vmThread = SlangVMThread_create(
-        vm);
-
-    int32_t inputData[8] = { 0, 1, 2, 3, 4, 5, 6, 7 };
-    int32_t outputData[8] = { 0 };
-
-    inputArg = inputData;
-    outputArg = outputData;
-
-    // TODO: set arguments based on specification from the user...
-    for (uint32_t threadID = 0; threadID < 8; ++threadID)
-    {
-#if 0
-        fprintf(stderr, "\n\nthreadID = %u\n\n", threadID);
-        fflush(stderr);
-#endif
-
-        SlangVMThread_beginCall(vmThread, vmFunc);
-
-        SlangVMThread_setArg(
-            vmThread,
-            0,
-            &threadID,
-            sizeof(threadID));
-
-        SlangVMThread_resume(vmThread);
-    }
-
-    for (uint32_t ii = 0; ii < 8; ++ii)
-    {
-        fprintf(stdout, "outputData[%u] = %d\n", ii, outputData[ii]);
-    }
-
-    spDestroyCompileRequest(request);
-    spDestroySession(session);
-
-    return SLANG_OK;
-}
-
-int main(
-    int argc,
-    char** argv)
-{
-    SlangResult res = innerMain(argc, argv);
-    return SLANG_FAILED(res) ? 1 : 0;
-}
-- 
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