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glsl2: Add some easy-to-enable debug printfs to ir_dead_code.cpp.

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This commit is contained in:
Eric Anholt 2010-08-05 12:07:23 -07:00
parent e995f0e10c
commit 3bd7e70bf7
1 changed files with 19 additions and 0 deletions
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19
src/glsl/ir_dead_code.cpp
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@ -32,6 +32,8 @@
#include "ir_variable_refcount.h"
#include "glsl_types.h"
static bool debug = false;
/**
* Do a dead code pass over instructions and everything that instructions
* references.
@ -60,6 +62,13 @@ do_dead_code(exec_list *instructions)
*/
assert(entry->referenced_count >= entry->assigned_count);
if (debug) {
printf("%s@%p: %d refs, %d assigns, %sdeclared in our scope\n",
entry->var->name, entry->var,
entry->referenced_count, entry->assigned_count,
entry->declaration ? "" : "not ");
}
if ((entry->referenced_count > entry->assigned_count)
|| !entry->declaration)
continue;
@ -72,6 +81,11 @@ do_dead_code(exec_list *instructions)
entry->var->mode != ir_var_inout) {
entry->assign->remove();
progress = true;
if (debug) {
printf("Removed assignment to %s@%p\n",
entry->var->name, entry->var);
}
}
} else {
/* If there are no assignments or references to the variable left,
@ -79,6 +93,11 @@ do_dead_code(exec_list *instructions)
*/
entry->var->remove();
progress = true;
if (debug) {
printf("Removed declaration of %s@%p\n",
entry->var->name, entry->var);
}
}
}
talloc_free(v.mem_ctx);