Because we optimistically skip compiling shaders if we have seen them
before we may need to compile them later at link time if they haven't
yet been use in a specific combination to create a program.
Rather than always recompiling we take advantage of the
gl_compile_status enum introduced in the previous patch to only
compile when we have previously skipped compilation.
This should help with regressions in app start-up times on cold cache
runs, compared with no cache.
---
src/compiler/glsl/glsl_parser_extras.cpp | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/src/compiler/glsl/glsl_parser_extras.cpp
b/src/compiler/glsl/glsl_parser_extras.cpp
index 59114a7..776636c 100644
--- a/src/compiler/glsl/glsl_parser_extras.cpp
+++ b/src/compiler/glsl/glsl_parser_extras.cpp
@@ -1945,20 +1945,27 @@ _mesa_glsl_compile_shader(struct gl_context *ctx,
struct gl_shader *shader,
if (ctx->_Shader->Flags & GLSL_CACHE_INFO) {
fprintf(stderr, "deferring compile of shader: %s\n",
_mesa_sha1_format(buf, shader->sha1));
}
shader->CompileStatus = compile_skipped;
free((void *)shader->FallbackSource);
shader->FallbackSource = NULL;
return;
}
+ } else {
+ /* We should only ever end up here if a re-compile has been forced by a
+ * shader cache miss. In which case we can skip the compile if its
+ * already be done by a previous fallback or the initial compile call.
+ */
+ if (shader->CompileStatus == compile_success)
+ return;
}
if (!state->error) {
_mesa_glsl_lexer_ctor(state, source);
_mesa_glsl_parse(state);
_mesa_glsl_lexer_dtor(state);
do_late_parsing_checks(state);
}
if (dump_ast) {
--
2.9.3
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