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This fixes a performance regression introduced early in glsl-compiler-1 work.
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the ptr in the node for reuse.
This can save a tremendous amount of time when resolving types in complex
expressions. One particular shader was taking several minutes to compile
but now compiles almost instantaneoulsy.
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progs
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Also, fix an assertion.
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Note that the inst ptr returned by new_instruction() may become invalid
after calling emit_() since the emit functions may allocate new instructions
which is done vial realloc().
Also, add some new assertions to try to catch this kind of bug.
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This includes the sampler2DRect and sampler2DRectShadow types and
the texture2DRect(), texture2DRectProj(), etc. built-in functions.
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Also requires GL_EXT_framebuffer_object and OpenGL 2.0 (for GLSL).
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GL_MAX_DRAW_BUFFERS is currently 4.
Added gl_FragData[] output for fragment programs.
In _swrast_write_rgba_span() loop over the color outputs/renderbuffers.
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into glsl-compiler-1
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Patch submitted by Christoph Brill.
See http://www.gentoo.org/proj/en/hardened/pic-fix-guide.xml
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For the time being, we put the gl_FrontFacing value in the FOGC.Y input
register. Combining FOGC and FrontFacing in one register is a bit of a
hack and may need to be changed someday.
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