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proc_clean: only consider fully-defined switch operands too.

This commit is contained in:
Charlotte 2023-08-11 16:34:00 +10:00 committed by Marcelina Kościelnicka
parent bf84861fc2
commit 860e3e4056
2 changed files with 18 additions and 3 deletions
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2
passes/proc/proc_clean.cc
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@ -31,7 +31,7 @@ PRIVATE_NAMESPACE_BEGIN
void proc_clean_switch(RTLIL::SwitchRule *sw, RTLIL::CaseRule *parent, bool &did_something, int &count, int max_depth)
{
if (sw->signal.size() > 0 && sw->signal.is_fully_const())
if (sw->signal.size() > 0 && sw->signal.is_fully_def())
{
int found_matching_case_idx = -1;
for (int i = 0; i < int(sw->cases.size()) && found_matching_case_idx < 0; i++)

19
tests/proc/clean_undef_case.ys
View File

@ -1,6 +1,6 @@
read_rtlil <<EOT
module \m
module \a
wire width 1 \w
process $p
switch 3'001
@ -14,9 +14,24 @@ module \m
end
end
module \b
wire width 1 \w
process $p
switch 3'--1
case 3'001
assign \w 3'001
case 3'010
assign \w 3'010
case 3'100
assign \w 3'100
end
end
end
EOT
proc_clean # Bug: removes the cases.
proc_clean # Removes the now-empty switch and its containing process.
select -assert-count 1 */p:*
select -assert-count 1 a/p:*
select -assert-count 1 b/p:*