This consolidates the TOKEN_OR_IDENTIFIER and RESERVED_WORD macros into
a single KEYWORD macro.
The old TOKEN_OR_IDENTIFIER macros handled the case of a word going from
an identifier to a keyword; the RESERVED_WORD macro handled a word going
from a reserved word to a language keyword. However, neither could
properly handle samplerBuffer (for example), which is an identifier in
1.10 and 1.20, a reserved word in 1.30, and a keyword in 1.40 and on.
Furthermore, the existing macros didn't properly handle reserved words
in GLSL ES 1.00. The best they could do was return a token (rather than
an identifier), resulting in an obtuse parser error, rather than a
user-friendly "you used a reserved word" error message.
All pragmas are currently ignored. Also, the error messages when a
pragma is used incorrectly (i.e., '#pragma debug(on)' inside a
function) are crap, but I think this is sufficient for now.
Fixes piglit test cases pragma-0[1-8].(vert|frag).
MAT2 and MAT2X2, for example, are treated identically by the parser.
The language version based error checking (becuase mat2x2 is not
available in GLSL 1.10) is already done in the lexer.
Without this, the parser will generate obtuse, useless error
diagnostics when reservered word that are not used by the grammar are
encountered in a shader.
Fixes bugzilla #29519.
When faced with a constructor like 'ivec4(0, 2, 0, 0)', we would
manage to get a value of 2 instead of 0 for the first "0". Usually 2
characters past "0" would point at some junk and lex as 0 anyway.
Fixes glsl-octal and glsl-unused-varyings.
_mesa_glsl_parse_state should be the parent for all temporary allocation
done while compiling a shader. glsl_shader should only be used as the
parent for the shader's final IR---the _result_ of compilation.
Since many IR instructions may be added or discarded during optimization
passes, IR should not ever be allocated to glsl_shader directly.
Done via sed -i s/talloc_parent(state)/state/g and s/talloc_parent(st)/st/g.
This also removes a ton of talloc_parent calls, which may help performance.
