diff options
Diffstat (limited to 'src/gallium/drivers')
| -rw-r--r-- | src/gallium/drivers/vc4/vc4_opt_peephole_sf.c | 22 |
1 files changed, 18 insertions, 4 deletions
diff --git a/src/gallium/drivers/vc4/vc4_opt_peephole_sf.c b/src/gallium/drivers/vc4/vc4_opt_peephole_sf.c index 414a9ef1eb3..f4856673ba2 100644 --- a/src/gallium/drivers/vc4/vc4_opt_peephole_sf.c +++ b/src/gallium/drivers/vc4/vc4_opt_peephole_sf.c @@ -106,18 +106,21 @@ inst_result_equals(struct qinst *a, struct qinst *b) return true; } -bool -qir_opt_peephole_sf(struct vc4_compile *c) +static bool +qir_opt_peephole_sf_block(struct vc4_compile *c, struct qblock *block) { bool progress = false; + /* We don't have liveness dataflow analysis for flags, but we also + * never generate a use of flags across control flow, so just treat + * them as unused at block exit. + */ bool sf_live = false; struct qinst *last_sf = NULL; /* Walk the block from bottom to top, tracking if the SF is used, and * removing unused or repeated ones. */ - list_for_each_entry_rev(struct qinst, inst, &c->cur_block->instructions, - link) { + qir_for_each_inst_rev(inst, block) { if (inst->sf) { if (!sf_live) { /* Our instruction's SF isn't read, so drop it. @@ -153,3 +156,14 @@ qir_opt_peephole_sf(struct vc4_compile *c) return progress; } + +bool +qir_opt_peephole_sf(struct vc4_compile *c) +{ + bool progress = false; + + qir_for_each_block(block, c) + progress = qir_opt_peephole_sf_block(c, block) || progress; + + return progress; +} |