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nir: Keep the range analysis HT around intra-pass until we make a change.

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This lets us memoize range analysis work across instructions.  Reduces
runtime of shader-db on Intel by -30.0288% +/- 2.1693% (n=3).

Fixes: 405de7ccb6 ("nir/range-analysis: Rudimentary value range analysis pass")
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Connor Abbott <cwabbott0@gmail.com>
This commit is contained in:
Eric Anholt
2019-09-23 15:40:46 -07:00
parent 7025dbe794
commit c23db0df18
7 changed files with 52 additions and 38 deletions
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13
src/compiler/nir/nir_range_analysis.c
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@@ -1028,14 +1028,9 @@ analyze_expression(const nir_alu_instr *instr, unsigned src,
#undef _______
struct ssa_result_range
nir_analyze_range(const nir_alu_instr *instr, unsigned src)
nir_analyze_range(struct hash_table *range_ht,
const nir_alu_instr *instr, unsigned src)
{
struct hash_table *ht = _mesa_pointer_hash_table_create(NULL);
const struct ssa_result_range r =
analyze_expression(instr, src, ht, nir_alu_src_type(instr, src));
_mesa_hash_table_destroy(ht, NULL);
return r;
return analyze_expression(instr, src, range_ht,
nir_alu_src_type(instr, src));
}