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glsl: fix variable ordering in the output_read_remover

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Use the hash of the variable name instead of the pointer value.

Signed-off-by: Vadim Girlin <vadimgirlin@gmail.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
This commit is contained in:
Vadim Girlin 2012-04-05 05:07:03 +04:00 • committed by Alex Deucher
parent a07cf3397e
commit 4b06280ea3
1 changed files with 17 additions and 1 deletions
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18
src/glsl/lower_output_reads.cpp
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@ -54,11 +54,27 @@ public:
virtual ir_visitor_status visit_leave(class ir_function_signature *);
};
/**
* Hash function for the output variables - computes the hash of the name.
* NOTE: We're using the name string to ensure that the hash doesn't depend
* on any random factors, otherwise the output_read_remover could produce
* the random order of the assignments.
*
* NOTE: If you want to reuse this function please take into account that
* generally the names of the variables are non-unique.
*/
static unsigned
hash_table_var_hash(const void *key)
{
const ir_variable * var = static_cast<const ir_variable *>(key);
return hash_table_string_hash(var->name);
}
output_read_remover::output_read_remover()
{
mem_ctx = ralloc_context(NULL);
replacements =
hash_table_ctor(0, hash_table_pointer_hash, hash_table_pointer_compare);
hash_table_ctor(0, hash_table_var_hash, hash_table_pointer_compare);
}
output_read_remover::~output_read_remover()