glsl2: Add a pass for removing unused functions.
For a shader involving many small functions, this avoids running
optimization across all of them after they've been inlined
post-linking.
Reduces the runtime of linking and running a fragment shader from Yo
Frankie from 1.6 seconds to 0.9 seconds (-44.9%, +/- 3.3%).
diff --git a/src/glsl/linker.cpp b/src/glsl/linker.cpp
index 94db57d..f9e24ca 100644
--- a/src/glsl/linker.cpp
+++ b/src/glsl/linker.cpp
@@ -1286,6 +1286,7 @@
progress = false;
progress = do_function_inlining(ir) || progress;
+ progress = do_dead_functions(ir) || progress;
progress = do_if_simplification(ir) || progress;
progress = do_copy_propagation(ir) || progress;
progress = do_dead_code_local(ir) || progress;