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glsl_to_tgsi: fix handling of CONT and BRK in eliminate_dead_code_advanced()

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This commit is contained in:
Bryan Cain 2012-01-02 14:07:38 -06:00
parent 7cbcce383c
commit 09497e020a
1 changed files with 7 additions and 2 deletions
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9
src/mesa/state_tracker/st_glsl_to_tgsi.cpp
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@ -3505,10 +3505,15 @@ glsl_to_tgsi_visitor::eliminate_dead_code_advanced(void)
switch (inst->op) {
case TGSI_OPCODE_BGNLOOP:
case TGSI_OPCODE_ENDLOOP:
case TGSI_OPCODE_CONT:
case TGSI_OPCODE_BRK:
/* End of a basic block, clear the write array entirely.
* FIXME: This keeps us from killing dead code when the writes are
*
* This keeps us from killing dead code when the writes are
* on either side of a loop, even when the register isn't touched
* inside the loop.
* inside the loop. However, glsl_to_tgsi_visitor doesn't seem to emit
* dead code of this type, so it shouldn't make a difference as long as
* the dead code elimination pass in the GLSL compiler does its job.
*/
memset(writes, 0, sizeof(*writes) * this->next_temp * 4);
break;