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intel/fs/ra: Add a helper for discarding the interference graph

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Tested-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
This commit is contained in:
Jason Ekstrand 2019-05-14 23:02:42 -05:00
parent 46494c3dc1
commit 2c14e2b5bf
1 changed files with 9 additions and 2 deletions
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11
src/intel/compiler/brw_fs_reg_allocate.cpp
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@ -431,6 +431,7 @@ private:
void setup_inst_interference(fs_inst *inst);
void build_interference_graph(bool allow_spilling);
void discard_interference_graph();
void set_spill_costs();
int choose_spill_reg();
@ -800,6 +801,13 @@ fs_reg_alloc::build_interference_graph(bool allow_spilling)
set_spill_costs();
}
void
fs_reg_alloc::discard_interference_graph()
{
ralloc_free(g);
g = NULL;
}
static void
emit_unspill(const fs_builder &bld, fs_reg dst,
uint32_t spill_offset, unsigned count)
@ -1148,8 +1156,7 @@ fs_reg_alloc::assign_regs(bool allow_spilling, bool spill_all)
* re-build the interference graph with MRFs enabled to allow spilling.
*/
if (!fs->spilled_any_registers) {
ralloc_free(g);
g = NULL;
discard_interference_graph();
build_interference_graph(true);
}