extern "C" int
test_shade (int argc, const char *argv[])
{
OIIO::Timer timer;
// Create a new shading system. We pass it the RendererServices
// object that services callbacks from the shading system, NULL for
// the TextureSystem (that just makes 'create' make its own TS), and
// an error handler.
shadingsys = ShadingSystem::create (&rend, NULL, &errhandler);
// Remember that each shader parameter may optionally have a
// metadata hint [[int lockgeom=...]], where 0 indicates that the
// parameter may be overridden by the geometry itself, for example
// with data interpolated from the mesh vertices, and a value of 1
// means that it is "locked" with respect to the geometry (i.e. it
// will not be overridden with interpolated or
// per-geometric-primitive data).
//
// In order to most fully optimize shader, we typically want any
// shader parameter not explicitly specified to default to being
// locked (i.e. no per-geometry override):
shadingsys->attribute("lockgeom", 1);
// Now we declare our shader.
//
// Each material in the scene is comprised of a "shader group."
// Each group is comprised of one or more "layers" (a.k.a. shader
// instances) with possible connections from outputs of
// upstream/early layers into the inputs of downstream/later layers.
// A shader instance is the combination of a reference to a shader
// master and its parameter values that may override the defaults in
// the shader source and may be particular to this instance (versus
// all the other instances of the same shader).
//
// A shader group declaration typically looks like this:
//
// ss->ShaderGroupBegin ();
// ss->Parameter ("paramname", TypeDesc paramtype, void *value);
// ... and so on for all the other parameters of...
// ss->Shader ("shadertype", "shadername", "layername");
// The Shader() call creates a new instance, which gets
// all the pending Parameter() values made right before it.
// ... and other shader instances in this group, interspersed with...
// ss->ConnectShaders ("layer1", "param1", "layer2", "param2");
// ... and other connections ...
// ss->ShaderGroupEnd ();
// // and now grab an opaque reference to that shader group:
// ShadingAttribStateRef shaderstate = s->state ();
//
// It looks so simple, and it really is, except that the way this
// testshade program works is that all the Parameter() and Shader()
// calls are done inside getargs(), as it walks through the command
// line arguments, whereas the connections accumulate and have
// to be processed at the end. Bear with us.
// Start the shader group.
shadingsys->ShaderGroupBegin ();
// Get the command line arguments. That will set up all the shader
// instances and their parameters for the group.
getargs (argc, argv);
// Now set up the connections
for (size_t i = 0; i < connections.size(); i += 4) {
if (i+3 < connections.size()) {
std::cout << "Connect "
<< connections[i] << "." << connections[i+1]
<< " to " << connections[i+2] << "." << connections[i+3]
<< "\n";
shadingsys->ConnectShaders (connections[i].c_str(),
connections[i+1].c_str(),
connections[i+2].c_str(),
connections[i+3].c_str());
}
}
// End the group
shadingsys->ShaderGroupEnd ();
// Now we should have a valid shading state, to get a reference to it.
ShadingAttribStateRef shaderstate = shadingsys->state ();
if (outputfiles.size() != 0)
std::cout << "\n";
// Set up the named transformations, including shader and object.
// For this test application, we just do this statically; in a real
// renderer, the global named space (like "myspace") would probably
// be static, but shader and object spaces may be different for each
// object.
setup_transformations (rend, Mshad, Mobj);
// Set up the image outputs requested on the command line
setup_output_images (shadingsys, shaderstate);
// Set up shader globals and a little test grid of points to shade.
ShaderGlobals shaderglobals;
double setuptime = timer.lap ();
std::vector<float> pixel;
// Optional: high-performance apps may request this thread-specific
// pointer in order to save a bit of time on each shade. Just like
// the name implies, a multithreaded renderer would need to do this
// separately for each thread, and be careful to always use the same
// thread_info each time for that thread.
//
// There's nothing wrong with a simpler app just passing NULL for
// the thread_info; in such a case, the ShadingSystem will do the
// necessary calls to find the thread-specific pointer itself, but
// this will degrade performance just a bit.
OSL::PerThreadInfo *thread_info = shadingsys->create_thread_info();
// Request a shading context so that we can execute the shader.
// We could get_context/release_constext for each shading point,
// but to save overhead, it's more efficient to reuse a context
// within a thread.
ShadingContext *ctx = shadingsys->get_context (thread_info);
// Allow a settable number of iterations to "render" the whole image,
// which is useful for time trials of things that would be too quick
// to accurately time for a single iteration
for (int iter = 0; iter < iters; ++iter) {
// Loop over all pixels in the image (in x and y)...
for (int y = 0, n = 0; y < yres; ++y) {
for (int x = 0; x < xres; ++x, ++n) {
// In a real renderer, this is where you would figure
// out what object point is visible in this pixel (or
// this sample, for antialiasing). Once determined,
// you'd set up a ShaderGlobals that contained the vital
// information about that point, such as its location,
// the normal there, the u and v coordinates on the
// surface, the transformation of that object, and so
// on.
//
// This test app is not a real renderer, so we just
// set it up rigged to look like we're rendering a single
// quadrilateral that exactly fills the viewport, and that
// setup is done in the following function call:
setup_shaderglobals (shaderglobals, shadingsys, x, y);
// Actually run the shader for this point
shadingsys->execute (*ctx, *shaderstate, shaderglobals);
// Save all the designated outputs. But only do so if we
// are on the last iteration requested, so that if we are
// doing a bunch of iterations for time trials, we only
// including the output pixel copying once in the timing.
if (iter == (iters - 1)) {
save_outputs (shadingsys, ctx, x, y);
}
}
}
}
// We're done shading with this context.
shadingsys->release_context (ctx);
// Now that we're done rendering, release the thread=specific
// pointer we saved. A simple app could skip this; but if the app
// asks for it (as we have in this example), then it should also
// destroy it when done with it.
shadingsys->destroy_thread_info(thread_info);
if (outputfiles.size() == 0)
std::cout << "\n";
// Write the output images to disk
for (size_t i = 0; i < outputimgs.size(); ++i) {
if (outputimgs[i]) {
outputimgs[i]->save();
delete outputimgs[i];
outputimgs[i] = NULL;
}
}
// Print some debugging info
if (debug || stats) {
double runtime = timer();
std::cout << "\n";
std::cout << "Setup: " << OIIO::Strutil::timeintervalformat (setuptime,2) << "\n";
std::cout << "Run : " << OIIO::Strutil::timeintervalformat (runtime,2) << "\n";
std::cout << "\n";
std::cout << shadingsys->getstats (5) << "\n";
}
// We're done with the shading system now, destroy it
ShadingSystem::destroy (shadingsys);
return EXIT_SUCCESS;
}
void
BackendLLVM::run ()
{
// At this point, we already hold the lock for this group, by virtue
// of ShadingSystemImpl::optimize_group.
OIIO::Timer timer;
std::string err;
{
#ifdef OSL_LLVM_NO_BITCODE
// I don't know which exact part has thread safety issues, but it
// crashes on windows when we don't lock.
// FIXME -- try subsequent LLVM releases on Windows to see if this
// is a problem that is eventually fixed on the LLVM side.
static spin_mutex mutex;
OIIO::spin_lock lock (mutex);
#endif
#ifdef OSL_LLVM_NO_BITCODE
ll.module (ll.new_module ("llvm_ops"));
#else
ll.module (ll.module_from_bitcode (osl_llvm_compiled_ops_block,
osl_llvm_compiled_ops_size,
"llvm_ops", &err));
if (err.length())
shadingcontext()->error ("ParseBitcodeFile returned '%s'\n", err.c_str());
ASSERT (ll.module());
#endif
// Create the ExecutionEngine
if (! ll.make_jit_execengine (&err)) {
shadingcontext()->error ("Failed to create engine: %s\n", err.c_str());
ASSERT (0);
return;
}
// End of mutex lock, for the OSL_LLVM_NO_BITCODE case
}
m_stat_llvm_setup_time += timer.lap();
// Set up m_num_used_layers to be the number of layers that are
// actually used, and m_layer_remap[] to map original layer numbers
// to the shorter list of actually-called layers.
int nlayers = group().nlayers();
m_layer_remap.resize (nlayers);
m_num_used_layers = 0;
for (int layer = 0; layer < group().nlayers(); ++layer) {
bool lastlayer = (layer == (nlayers-1));
if (! group()[layer]->unused() || lastlayer)
m_layer_remap[layer] = m_num_used_layers++;
else
m_layer_remap[layer] = -1;
}
shadingsys().m_stat_empty_instances += group().nlayers()-m_num_used_layers;
initialize_llvm_group ();
// Generate the LLVM IR for each layer. Skip unused layers.
m_llvm_local_mem = 0;
llvm::Function** funcs = (llvm::Function**)alloca(m_num_used_layers * sizeof(llvm::Function*));
for (int layer = 0; layer < nlayers; ++layer) {
set_inst (layer);
bool lastlayer = (layer == (nlayers-1));
int index = m_layer_remap[layer];
if (index != -1)
funcs[index] = build_llvm_instance (lastlayer);
}
llvm::Function* entry_func = funcs[m_num_used_layers-1];
m_stat_llvm_irgen_time += timer.lap();
if (shadingsys().m_max_local_mem_KB &&
m_llvm_local_mem/1024 > shadingsys().m_max_local_mem_KB) {
shadingcontext()->error ("Shader group \"%s\" needs too much local storage: %d KB",
group().name(), m_llvm_local_mem/1024);
}
// Optimize the LLVM IR unless it's just a ret void group (1 layer,
// 1 BB, 1 inst == retvoid)
bool skip_optimization = m_num_used_layers == 1 && ll.func_is_empty(entry_func);
// Label the group as being retvoid or not.
group().does_nothing(skip_optimization);
if (skip_optimization) {
shadingsys().m_stat_empty_groups += 1;
shadingsys().m_stat_empty_instances += 1; // the one layer is empty
} else {
ll.do_optimize();
}
m_stat_llvm_opt_time += timer.lap();
if (llvm_debug()) {
std::cout << "func after opt = " << ll.bitcode_string (entry_func) << "\n";
std::cout.flush();
}
// Debug code to dump the resulting bitcode to a file
if (llvm_debug() >= 2) {
std::string name = Strutil::format ("%s_%d.bc", inst()->layername(),
inst()->id());
ll.write_bitcode_file (name.c_str());
}
// Force the JIT to happen now and retrieve the JITed function
group().llvm_compiled_version ((RunLLVMGroupFunc) ll.getPointerToFunction(entry_func));
// Remove the IR for the group layer functions, we've already JITed it
// and will never need the IR again. This saves memory, and also saves
// a huge amount of time since we won't re-optimize it again and again
// if we keep adding new shader groups to the same Module.
for (int i = 0; i < m_num_used_layers; ++i) {
ll.delete_func_body (funcs[i]);
}
// Free the exec and module to reclaim all the memory. This definitely
// saves memory, and has almost no effect on runtime.
ll.execengine (NULL);
// N.B. Destroying the EE should have destroyed the module as well.
ll.module (NULL);
m_stat_llvm_jit_time += timer.lap();
m_stat_total_llvm_time = timer();
if (shadingsys().m_compile_report) {
shadingcontext()->info ("JITed shader group %s:", group().name());
shadingcontext()->info (" (%1.2fs = %1.2f setup, %1.2f ir, %1.2f opt, %1.2f jit; local mem %dKB)",
m_stat_total_llvm_time,
m_stat_llvm_setup_time,
m_stat_llvm_irgen_time, m_stat_llvm_opt_time,
m_stat_llvm_jit_time,
m_llvm_local_mem/1024);
}
}
extern "C" OSL_DLL_EXPORT int
test_shade (int argc, const char *argv[])
{
OIIO::Timer timer;
// Create a new shading system. We pass it the RendererServices
// object that services callbacks from the shading system, NULL for
// the TextureSystem (that just makes 'create' make its own TS), and
// an error handler.
shadingsys = new ShadingSystem (&rend, NULL, &errhandler);
// Register the layout of all closures known to this renderer
// Any closure used by the shader which is not registered, or
// registered with a different number of arguments will lead
// to a runtime error.
register_closures(shadingsys);
// Remember that each shader parameter may optionally have a
// metadata hint [[int lockgeom=...]], where 0 indicates that the
// parameter may be overridden by the geometry itself, for example
// with data interpolated from the mesh vertices, and a value of 1
// means that it is "locked" with respect to the geometry (i.e. it
// will not be overridden with interpolated or
// per-geometric-primitive data).
//
// In order to most fully optimize shader, we typically want any
// shader parameter not explicitly specified to default to being
// locked (i.e. no per-geometry override):
shadingsys->attribute("lockgeom", 1);
// Now we declare our shader.
//
// Each material in the scene is comprised of a "shader group."
// Each group is comprised of one or more "layers" (a.k.a. shader
// instances) with possible connections from outputs of
// upstream/early layers into the inputs of downstream/later layers.
// A shader instance is the combination of a reference to a shader
// master and its parameter values that may override the defaults in
// the shader source and may be particular to this instance (versus
// all the other instances of the same shader).
//
// A shader group declaration typically looks like this:
//
// ShaderGroupRef shadergroup = ss->ShaderGroupBegin ();
// ss->Parameter ("paramname", TypeDesc paramtype, void *value);
// ... and so on for all the other parameters of...
// ss->Shader ("shadertype", "shadername", "layername");
// The Shader() call creates a new instance, which gets
// all the pending Parameter() values made right before it.
// ... and other shader instances in this group, interspersed with...
// ss->ConnectShaders ("layer1", "param1", "layer2", "param2");
// ... and other connections ...
// ss->ShaderGroupEnd ();
//
// It looks so simple, and it really is, except that the way this
// testshade program works is that all the Parameter() and Shader()
// calls are done inside getargs(), as it walks through the command
// line arguments, whereas the connections accumulate and have
// to be processed at the end. Bear with us.
// Start the shader group and grab a reference to it.
shadergroup = shadingsys->ShaderGroupBegin (groupname);
// Get the command line arguments. That will set up all the shader
// instances and their parameters for the group.
getargs (argc, argv);
if (! shadergroup) {
std::cerr << "ERROR: Invalid shader group. Exiting testshade.\n";
return EXIT_FAILURE;
}
shadingsys->attribute (shadergroup.get(), "groupname", groupname);
// Now set up the connections
for (size_t i = 0; i < connections.size(); i += 4) {
if (i+3 < connections.size()) {
std::cout << "Connect "
<< connections[i] << "." << connections[i+1]
<< " to " << connections[i+2] << "." << connections[i+3]
<< "\n";
shadingsys->ConnectShaders (connections[i].c_str(),
connections[i+1].c_str(),
connections[i+2].c_str(),
connections[i+3].c_str());
}
}
// End the group
shadingsys->ShaderGroupEnd ();
if (verbose || do_oslquery) {
std::string pickle;
shadingsys->getattribute (shadergroup.get(), "pickle", pickle);
std::cout << "Shader group:\n---\n" << pickle << "\n---\n";
std::cout << "\n";
ustring groupname;
shadingsys->getattribute (shadergroup.get(), "groupname", groupname);
std::cout << "Shader group \"" << groupname << "\" layers are:\n";
int num_layers = 0;
shadingsys->getattribute (shadergroup.get(), "num_layers", num_layers);
if (num_layers > 0) {
std::vector<const char *> layers (size_t(num_layers), NULL);
shadingsys->getattribute (shadergroup.get(), "layer_names",
TypeDesc(TypeDesc::STRING, num_layers),
&layers[0]);
for (int i = 0; i < num_layers; ++i) {
std::cout << " " << (layers[i] ? layers[i] : "<unnamed>") << "\n";
if (do_oslquery) {
OSLQuery q;
q.init (shadergroup.get(), i);
for (size_t p = 0; p < q.nparams(); ++p) {
const OSLQuery::Parameter *param = q.getparam(p);
std::cout << "\t" << (param->isoutput ? "output " : "")
<< param->type << ' ' << param->name << "\n";
}
}
}
}
std::cout << "\n";
}
if (archivegroup.size())
shadingsys->archive_shadergroup (shadergroup.get(), archivegroup);
if (outputfiles.size() != 0)
std::cout << "\n";
// Set up the named transformations, including shader and object.
// For this test application, we just do this statically; in a real
// renderer, the global named space (like "myspace") would probably
// be static, but shader and object spaces may be different for each
// object.
setup_transformations (rend, Mshad, Mobj);
// Set up the image outputs requested on the command line
setup_output_images (shadingsys, shadergroup);
if (debug)
test_group_attributes (shadergroup.get());
if (num_threads < 1)
num_threads = boost::thread::hardware_concurrency();
double setuptime = timer.lap ();
// Allow a settable number of iterations to "render" the whole image,
// which is useful for time trials of things that would be too quick
// to accurately time for a single iteration
for (int iter = 0; iter < iters; ++iter) {
OIIO::ROI roi (0, xres, 0, yres);
if (use_shade_image)
OSL::shade_image (*shadingsys, *shadergroup, NULL,
*outputimgs[0], outputvarnames,
pixelcenters ? ShadePixelCenters : ShadePixelGrid,
roi, num_threads);
else {
bool save = (iter == (iters-1)); // save on last iteration
#if 0
shade_region (shadergroup.get(), roi, save);
#else
OIIO::ImageBufAlgo::parallel_image (
boost::bind (shade_region, shadergroup.get(), _1, save),
roi, num_threads);
#endif
}
// If any reparam was requested, do it now
if (reparams.size() && reparam_layer.size()) {
for (size_t p = 0; p < reparams.size(); ++p) {
const ParamValue &pv (reparams[p]);
shadingsys->ReParameter (*shadergroup, reparam_layer.c_str(),
pv.name().c_str(), pv.type(),
pv.data());
}
}
}
double runtime = timer.lap();
if (outputfiles.size() == 0)
std::cout << "\n";
// Write the output images to disk
for (size_t i = 0; i < outputimgs.size(); ++i) {
if (outputimgs[i]) {
if (! print_outputs) {
std::string filename = outputimgs[i]->name();
// JPEG, GIF, and PNG images should be automatically saved
// as sRGB because they are almost certainly supposed to
// be displayed on web pages.
using namespace OIIO;
if (Strutil::iends_with (filename, ".jpg") ||
Strutil::iends_with (filename, ".jpeg") ||
Strutil::iends_with (filename, ".gif") ||
Strutil::iends_with (filename, ".png")) {
ImageBuf ccbuf;
ImageBufAlgo::colorconvert (ccbuf, *outputimgs[i],
"linear", "sRGB", false,
"", "");
ccbuf.set_write_format (outputimgs[i]->spec().format);
ccbuf.write (filename);
} else {
outputimgs[i]->write (filename);
}
}
delete outputimgs[i];
outputimgs[i] = NULL;
}
}
// Print some debugging info
if (debug || runstats || profile) {
double writetime = timer.lap();
std::cout << "\n";
std::cout << "Setup: " << OIIO::Strutil::timeintervalformat (setuptime,2) << "\n";
std::cout << "Run : " << OIIO::Strutil::timeintervalformat (runtime,2) << "\n";
std::cout << "Write: " << OIIO::Strutil::timeintervalformat (writetime,2) << "\n";
std::cout << "\n";
std::cout << shadingsys->getstats (5) << "\n";
OIIO::TextureSystem *texturesys = shadingsys->texturesys();
if (texturesys)
std::cout << texturesys->getstats (5) << "\n";
std::cout << ustring::getstats() << "\n";
}
// We're done with the shading system now, destroy it
shadergroup.reset (); // Must release this before destroying shadingsys
delete shadingsys;
return EXIT_SUCCESS;
}
extern "C" int
test_shade (int argc, const char *argv[])
{
OIIO::Timer timer;
// Create a new shading system. We pass it the RendererServices
// object that services callbacks from the shading system, NULL for
// the TextureSystem (that just makes 'create' make its own TS), and
// an error handler.
shadingsys = new ShadingSystem (&rend, NULL, &errhandler);
register_closures(shadingsys);
// Remember that each shader parameter may optionally have a
// metadata hint [[int lockgeom=...]], where 0 indicates that the
// parameter may be overridden by the geometry itself, for example
// with data interpolated from the mesh vertices, and a value of 1
// means that it is "locked" with respect to the geometry (i.e. it
// will not be overridden with interpolated or
// per-geometric-primitive data).
//
// In order to most fully optimize shader, we typically want any
// shader parameter not explicitly specified to default to being
// locked (i.e. no per-geometry override):
shadingsys->attribute("lockgeom", 1);
// Now we declare our shader.
//
// Each material in the scene is comprised of a "shader group."
// Each group is comprised of one or more "layers" (a.k.a. shader
// instances) with possible connections from outputs of
// upstream/early layers into the inputs of downstream/later layers.
// A shader instance is the combination of a reference to a shader
// master and its parameter values that may override the defaults in
// the shader source and may be particular to this instance (versus
// all the other instances of the same shader).
//
// A shader group declaration typically looks like this:
//
// ShaderGroupRef shadergroup = ss->ShaderGroupBegin ();
// ss->Parameter ("paramname", TypeDesc paramtype, void *value);
// ... and so on for all the other parameters of...
// ss->Shader ("shadertype", "shadername", "layername");
// The Shader() call creates a new instance, which gets
// all the pending Parameter() values made right before it.
// ... and other shader instances in this group, interspersed with...
// ss->ConnectShaders ("layer1", "param1", "layer2", "param2");
// ... and other connections ...
// ss->ShaderGroupEnd ();
//
// It looks so simple, and it really is, except that the way this
// testshade program works is that all the Parameter() and Shader()
// calls are done inside getargs(), as it walks through the command
// line arguments, whereas the connections accumulate and have
// to be processed at the end. Bear with us.
// Start the shader group and grab a reference to it.
ShaderGroupRef shadergroup = shadingsys->ShaderGroupBegin ();
// Get the command line arguments. That will set up all the shader
// instances and their parameters for the group.
getargs (argc, argv);
// Now set up the connections
for (size_t i = 0; i < connections.size(); i += 4) {
if (i+3 < connections.size()) {
std::cout << "Connect "
<< connections[i] << "." << connections[i+1]
<< " to " << connections[i+2] << "." << connections[i+3]
<< "\n";
shadingsys->ConnectShaders (connections[i].c_str(),
connections[i+1].c_str(),
connections[i+2].c_str(),
connections[i+3].c_str());
}
}
// End the group
shadingsys->ShaderGroupEnd ();
if (outputfiles.size() != 0)
std::cout << "\n";
// Set up the named transformations, including shader and object.
// For this test application, we just do this statically; in a real
// renderer, the global named space (like "myspace") would probably
// be static, but shader and object spaces may be different for each
// object.
setup_transformations (rend, Mshad, Mobj);
// Set up the image outputs requested on the command line
setup_output_images (shadingsys, shadergroup);
if (debug)
test_group_attributes (shadergroup.get());
if (num_threads < 1)
num_threads = boost::thread::hardware_concurrency();
double setuptime = timer.lap ();
// Allow a settable number of iterations to "render" the whole image,
// which is useful for time trials of things that would be too quick
// to accurately time for a single iteration
for (int iter = 0; iter < iters; ++iter) {
OIIO::ROI roi (0, xres, 0, yres);
bool save = (iter == (iters-1)); // save on last iteration
#if 0
shade_region (shadergroup.get(), roi, save);
#else
OIIO::ImageBufAlgo::parallel_image (
boost::bind (shade_region, shadergroup.get(), _1, save),
roi, num_threads);
#endif
// If any reparam was requested, do it now
if (reparams.size() && reparam_layer.size()) {
for (size_t p = 0; p < reparams.size(); ++p) {
const ParamValue &pv (reparams[p]);
shadingsys->ReParameter (*shadergroup, reparam_layer.c_str(),
pv.name().c_str(), pv.type(),
pv.data());
}
}
}
if (outputfiles.size() == 0)
std::cout << "\n";
// Write the output images to disk
for (size_t i = 0; i < outputimgs.size(); ++i) {
if (outputimgs[i]) {
outputimgs[i]->save();
delete outputimgs[i];
outputimgs[i] = NULL;
}
}
// Print some debugging info
if (debug || stats) {
double runtime = timer.lap();
std::cout << "\n";
std::cout << "Setup: " << OIIO::Strutil::timeintervalformat (setuptime,2) << "\n";
std::cout << "Run : " << OIIO::Strutil::timeintervalformat (runtime,2) << "\n";
std::cout << "\n";
std::cout << shadingsys->getstats (5) << "\n";
OIIO::TextureSystem *texturesys = shadingsys->texturesys();
if (texturesys)
std::cout << texturesys->getstats (5) << "\n";
std::cout << ustring::getstats() << "\n";
}
// We're done with the shading system now, destroy it
shadergroup.reset (); // Must release this before destroying shadingsys
delete shadingsys;
return EXIT_SUCCESS;
}
bool
ShadingContext::execute (ShaderGroup &sgroup, ShaderGlobals &ssg, bool run)
{
m_attribs = &sgroup;
// Optimize if we haven't already
if (sgroup.nlayers()) {
sgroup.start_running ();
if (! sgroup.optimized()) {
shadingsys().optimize_group (sgroup);
if (shadingsys().m_greedyjit && shadingsys().m_groups_to_compile_count) {
// If we are greedily JITing, optimize/JIT everything now
shadingsys().optimize_all_groups ();
}
}
if (sgroup.does_nothing())
return false;
} else {
// empty shader - nothing to do!
return false;
}
int profile = shadingsys().m_profile;
OIIO::Timer timer (profile);
// Allocate enough space on the heap
size_t heap_size_needed = sgroup.llvm_groupdata_size();
if (heap_size_needed > m_heap.size()) {
if (shadingsys().debug())
info (" ShadingContext %p growing heap to %llu",
this, (unsigned long long) heap_size_needed);
m_heap.resize (heap_size_needed);
}
// Zero out the heap memory we will be using
if (shadingsys().m_clearmemory)
memset (&m_heap[0], 0, heap_size_needed);
// Set up closure storage
m_closure_pool.clear();
// Clear the message blackboard
m_messages.clear ();
// Clear miscellaneous scratch space
m_scratch_pool.clear ();
if (run) {
ssg.context = this;
ssg.renderer = renderer();
ssg.Ci = NULL;
RunLLVMGroupFunc run_func = sgroup.llvm_compiled_version();
DASSERT (run_func);
DASSERT (sgroup.llvm_groupdata_size() <= m_heap.size());
run_func (&ssg, &m_heap[0]);
}
// Process any queued up error messages, warnings, printfs from shaders
process_errors ();
if (profile) {
long long ticks = timer.ticks();
shadingsys().m_stat_total_shading_time_ticks += ticks;
sgroup.m_stat_total_shading_time_ticks += ticks;
}
return true;
}
void
RuntimeOptimizer::build_llvm_group ()
{
// At this point, we already hold the lock for this group, by virtue
// of ShadingSystemImpl::optimize_group.
OIIO::Timer timer;
if (! m_thread->llvm_context)
m_thread->llvm_context = new llvm::LLVMContext();
if (! m_thread->llvm_jitmm) {
m_thread->llvm_jitmm = llvm::JITMemoryManager::CreateDefaultMemManager();
OIIO::spin_lock lock (m_shadingsys.m_llvm_mutex); // lock m_llvm_jitmm_hold
m_shadingsys.m_llvm_jitmm_hold.push_back (shared_ptr<llvm::JITMemoryManager>(m_thread->llvm_jitmm));
}
ASSERT (! m_llvm_module);
// Load the LLVM bitcode and parse it into a Module
const char *data = osl_llvm_compiled_ops_block;
llvm::MemoryBuffer* buf = llvm::MemoryBuffer::getMemBuffer (llvm::StringRef(data, osl_llvm_compiled_ops_size));
std::string err;
#ifdef OSL_LLVM_NO_BITCODE
m_llvm_module = new llvm::Module("llvm_ops", *llvm_context());
#else
// Load the LLVM bitcode and parse it into a Module
m_llvm_module = llvm::ParseBitcodeFile (buf, *m_thread->llvm_context, &err);
if (err.length())
m_shadingsys.error ("ParseBitcodeFile returned '%s'\n", err.c_str());
delete buf;
#endif
// Create the ExecutionEngine
ASSERT (! m_llvm_exec);
err.clear ();
llvm::JITMemoryManager *mm = new OSL_Dummy_JITMemoryManager(m_thread->llvm_jitmm);
m_llvm_exec = llvm::ExecutionEngine::createJIT (m_llvm_module, &err, mm, llvm::CodeGenOpt::Default, /*AllocateGVsWithCode*/ false);
if (! m_llvm_exec) {
m_shadingsys.error ("Failed to create engine: %s\n", err.c_str());
ASSERT (0);
return;
}
// Force it to JIT as soon as we ask it for the code pointer,
// don't take any chances that it might JIT lazily, since we
// will be stealing the JIT code memory from under its nose and
// destroying the Module & ExecutionEngine.
m_llvm_exec->DisableLazyCompilation ();
m_stat_llvm_setup_time += timer.lap();
// Set up m_num_used_layers to be the number of layers that are
// actually used, and m_layer_remap[] to map original layer numbers
// to the shorter list of actually-called layers.
int nlayers = m_group.nlayers();
m_layer_remap.resize (nlayers);
m_num_used_layers = 0;
for (int layer = 0; layer < m_group.nlayers(); ++layer) {
bool lastlayer = (layer == (nlayers-1));
if (! m_group[layer]->unused() || lastlayer)
m_layer_remap[layer] = m_num_used_layers++;
else
m_layer_remap[layer] = -1;
}
m_shadingsys.m_stat_empty_instances += m_group.nlayers()-m_num_used_layers;
initialize_llvm_group ();
// Generate the LLVM IR for each layer. Skip unused layers.
m_llvm_local_mem = 0;
llvm::Function** funcs = (llvm::Function**)alloca(m_num_used_layers * sizeof(llvm::Function*));
for (int layer = 0; layer < nlayers; ++layer) {
set_inst (layer);
bool lastlayer = (layer == (nlayers-1));
int index = m_layer_remap[layer];
if (index != -1)
funcs[index] = build_llvm_instance (lastlayer);
}
llvm::Function* entry_func = funcs[m_num_used_layers-1];
m_stat_llvm_irgen_time += timer.lap();
if (m_shadingsys.m_max_local_mem_KB &&
m_llvm_local_mem/1024 > m_shadingsys.m_max_local_mem_KB) {
m_shadingsys.error ("Shader group \"%s\" needs too much local storage: %d KB",
m_group.name().c_str(), m_llvm_local_mem/1024);
}
// Optimize the LLVM IR unless it's just a ret void group (1 layer,
// 1 BB, 1 inst == retvoid)
bool skip_optimization = m_num_used_layers == 1 && entry_func->size() == 1 && entry_func->front().size() == 1;
// Label the group as being retvoid or not.
m_group.does_nothing(skip_optimization);
if (skip_optimization) {
m_shadingsys.m_stat_empty_groups += 1;
m_shadingsys.m_stat_empty_instances += 1; // the one layer is empty
} else {
m_llvm_passes->run (*llvm_module());
}
m_stat_llvm_opt_time += timer.lap();
if (shadingsys().llvm_debug()) {
llvm::outs() << "func after opt = " << *entry_func << "\n";
llvm::outs().flush();
}
// Debug code to dump the resulting bitcode to a file
if (shadingsys().llvm_debug() >= 2) {
std::string err_info;
std::string name = Strutil::format ("%s_%d.bc",
inst()->layername().c_str(),
inst()->id());
llvm::raw_fd_ostream out (name.c_str(), err_info);
llvm::WriteBitcodeToFile (llvm_module(), out);
}
// Force the JIT to happen now
RunLLVMGroupFunc f = (RunLLVMGroupFunc) m_llvm_exec->getPointerToFunction(entry_func);
m_group.llvm_compiled_version (f);
// Remove the IR for the group layer functions, we've already JITed it
// and will never need the IR again. This saves memory, and also saves
// a huge amount of time since we won't re-optimize it again and again
// if we keep adding new shader groups to the same Module.
for (int i = 0; i < m_num_used_layers; ++i) {
funcs[i]->deleteBody();
}
// Free the exec and module to reclaim all the memory. This definitely
// saves memory, and has almost no effect on runtime.
delete m_llvm_exec;
m_llvm_exec = NULL;
// N.B. Destroying the EE should have destroyed the module as well.
m_llvm_module = NULL;
m_stat_llvm_jit_time += timer.lap();
}