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Restrict unrolling to loops that are nested within less than 4 loops #1595

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merged 4 commits into from
Oct 11, 2024
Merged

Restrict unrolling to loops that are nested within less than 4 loops #1595

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e625b56
Do not compute nr of instructions and unroll empty loops
karoliineh Oct 3, 2024
761282b
Do not unroll loops with a nesting higher than 3
karoliineh Oct 4, 2024
3ed322d
Restore that empty loops are not unrolled but do it more efficiently
karoliineh Oct 10, 2024
eb1fded
Cram tests: do not unroll empty loops even if unrolling factor is man…
karoliineh Oct 10, 2024
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Cram tests: do not unroll empty loops even if unrolling factor is man… 
…ually set
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@karoliineh
karoliineh committed Oct 10, 2024
commit eb1fdedaff59992c966b8f5dfa2044891da1a220
16 changes: 0 additions & 16 deletions tests/regression/55-loop-unrolling/08-bad.t
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Original file line number Diff line number Diff line change
@@ -1,18 +1,11 @@
$ goblint --set lib.activated '[]' --set exp.unrolling-factor 1 --enable justcil --set dbg.justcil-printer clean 08-bad.c
[Info] unrolling loop at 08-bad.c:9:7-9:23 with factor 1
[Info] unrolling loop at 08-bad.c:15:8-15:24 with factor 1
int main(void)
{
int m ;

{
{
goto switch_default;
{
if (! 0) {
goto loop_end;
}
loop_continue_0: /* CIL Label */ ;
switch_default: /* CIL Label */
{
while (1) {
Expand All @@ -23,16 +16,9 @@
}
while_break: /* CIL Label */ ;
}
loop_end: /* CIL Label */ ;
}
switch_break: /* CIL Label */ ;
}
goto lab;
{
if (! 0) {
goto loop_end___0;
}
loop_continue_0___0: /* CIL Label */ ;
lab:
{
while (1) {
Expand All @@ -43,8 +29,6 @@
}
while_break___0: /* CIL Label */ ;
}
loop_end___0: /* CIL Label */ ;
}
return (0);
}
}
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