We were using ir_var_auto for the inlined function parameter variables,
which is wrong, as it suggests that those are real variables declared
by the program.
Normally this doesn't matter. However, if you called built-ins at
global scope, it would pollute the global variable namespace with
these new parameter temporaries. If the shader already had variables
with those names, the linker might see contradictory global variable
declarations and raise an error.
Making them temporaries indicates that these are just things generated
by the compiler internally. This avoids confusing the linker.
Fixes a new Piglit test: glsl-fs-multiple-builtins.
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=99154
Reported-by: Niels Ole Salscheider <niels_ole@salscheider-online.de>
Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>
Reviewed-by: Iago Toral Quiroga <itoral@igalia.com>
This is required when an out argument involves an array index that is either
a global variable modified by the function or another out argument in the
same function call.
Fixes the shaders/out-parameter-indexing/vs-inout-index-inout-* tests.
v2:
- modify the ir_dereference_array nodes in place
- use ir_hierarchical_visitor
v3: use base_ir (Ian Romanick)
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
