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proc_clean: remove any empty cases at the end of the switch.

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Previously, only completely empty switches were removed.
This commit is contained in:
whitequark 2018-12-22 08:58:37 +00:00
parent ee8a7589e0
commit b784440857
1 changed files with 3 additions and 7 deletions
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10
passes/proc/proc_clean.cc
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@ -77,18 +77,14 @@ void proc_clean_switch(RTLIL::SwitchRule *sw, RTLIL::CaseRule *parent, bool &did
} }
else else
{ {
bool all_cases_are_empty = true;
for (auto cs : sw->cases) { for (auto cs : sw->cases) {
if (cs->actions.size() != 0 || cs->switches.size() != 0)
all_cases_are_empty = false;
if (max_depth != 0) if (max_depth != 0)
proc_clean_case(cs, did_something, count, max_depth-1); proc_clean_case(cs, did_something, count, max_depth-1);
} }
if (all_cases_are_empty) { while (!sw->cases.empty() && (sw->cases.back()->actions.empty() && sw->cases.back()->switches.empty())) {
did_something = true; did_something = true;
for (auto cs : sw->cases) delete sw->cases.back();
delete cs; sw->cases.pop_back();
sw->cases.clear();
} }
} }
} }