glsl: Reject shaders that contain static recursion
The GLSL 1.20 and later specs say: "Recursion is not allowed, not even statically. Static recursion is present if the static function call graph of the program contains cycles." Recursion is detected and rejected both a compile-time and at link-time. The complie-time check happens to detect some cases that may be removed by various optimization passes. The spec doesn't seem to allow this, but other vendors (e.g., NVIDIA) appear to only check at link-time after all optimizations. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=33885 Reviewed-by:Paul Berry <stereotype441@gmail.com> Reviewed-by:
Eric Anholt <eric@anholt.net> Reviewed-by:
Kenneth Graunke <kenneth@whitecape.org>
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- src/glsl/Makefile 1 addition, 0 deletionssrc/glsl/Makefile
- src/glsl/ast_to_hir.cpp 2 additions, 0 deletionssrc/glsl/ast_to_hir.cpp
- src/glsl/ir.h 26 additions, 0 deletionssrc/glsl/ir.h
- src/glsl/ir_function_detect_recursion.cpp 371 additions, 0 deletionssrc/glsl/ir_function_detect_recursion.cpp
- src/glsl/linker.cpp 4 additions, 0 deletionssrc/glsl/linker.cpp
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