diff options
| author | Rob Clark <robclark@freedesktop.org> | 2015-09-09 18:28:55 -0400 |
|---|---|---|
| committer | Rob Clark <robclark@freedesktop.org> | 2015-09-13 11:08:27 -0400 |
| commit | 86358e949eaa13c075338901024d0e1009fa7e99 (patch) | |
| tree | f12fb61ec1411f039a1769ad58d41cba09ed465b | |
| parent | d6fbcf6ee28c273b37bf293aea5faf77253029a3 (diff) | |
tgsi/scan: add support to figure out max nesting depth
Sometimes a useful thing for compilers (or, for example, tgsi_to_nir) to
know. And pretty trivial for scan to figure this out for us.
Signed-off-by: Rob Clark <robclark@freedesktop.org>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Brian Paul <brianp@vmware.com>
| -rw-r--r-- | src/gallium/auxiliary/tgsi/tgsi_scan.c | 16 | ||||
| -rw-r--r-- | src/gallium/auxiliary/tgsi/tgsi_scan.h | 5 |
2 files changed, 21 insertions, 0 deletions
diff --git a/src/gallium/auxiliary/tgsi/tgsi_scan.c b/src/gallium/auxiliary/tgsi/tgsi_scan.c index 9810b5468d9..66306d7d5d2 100644 --- a/src/gallium/auxiliary/tgsi/tgsi_scan.c +++ b/src/gallium/auxiliary/tgsi/tgsi_scan.c @@ -56,6 +56,7 @@ tgsi_scan_shader(const struct tgsi_token *tokens, { uint procType, i; struct tgsi_parse_context parse; + unsigned current_depth = 0; memset(info, 0, sizeof(*info)); for (i = 0; i < TGSI_FILE_COUNT; i++) @@ -100,6 +101,21 @@ tgsi_scan_shader(const struct tgsi_token *tokens, assert(fullinst->Instruction.Opcode < TGSI_OPCODE_LAST); info->opcode_count[fullinst->Instruction.Opcode]++; + switch (fullinst->Instruction.Opcode) { + case TGSI_OPCODE_IF: + case TGSI_OPCODE_UIF: + case TGSI_OPCODE_BGNLOOP: + current_depth++; + info->max_depth = MAX2(info->max_depth, current_depth); + break; + case TGSI_OPCODE_ENDIF: + case TGSI_OPCODE_ENDLOOP: + current_depth--; + break; + default: + break; + } + if (fullinst->Instruction.Opcode >= TGSI_OPCODE_F2D && fullinst->Instruction.Opcode <= TGSI_OPCODE_DSSG) info->uses_doubles = true; diff --git a/src/gallium/auxiliary/tgsi/tgsi_scan.h b/src/gallium/auxiliary/tgsi/tgsi_scan.h index c5900bc05d4..42539ee9f45 100644 --- a/src/gallium/auxiliary/tgsi/tgsi_scan.h +++ b/src/gallium/auxiliary/tgsi/tgsi_scan.h @@ -113,6 +113,11 @@ struct tgsi_shader_info unsigned indirect_files_written; unsigned properties[TGSI_PROPERTY_COUNT]; /* index with TGSI_PROPERTY_ */ + + /** + * Max nesting limit of loops/if's + */ + unsigned max_depth; }; extern void |