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Filter: Improve handling of stack frames in filter bytecode

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When f_line is done, we have to pop the stack frame. The old code just
removed nominal number of args/vars. Change it to use stored ventry value
modified by number of returned values. This allows to allocate variables
on a stack frame during execution of f_lines instead of just at start.

But we need to know the number of returned values for a f_line. It is 1
for term, 0 for cmd. Store that to f_line during linearization.
This commit is contained in:
Ondrej Zajicek (work)
2022-03-09 02:32:29 +01:00
committed by Ondrej Zajicek
parent f31f4e6eef
commit a2527ee53d
9 changed files with 26 additions and 24 deletions
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6
filter/decl.m4
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@@ -216,7 +216,7 @@ whati->f$1 = f$1;
FID_DUMP_BODY()m4_dnl
f_dump_line(item->fl$1, indent + 1);
FID_LINEARIZE_BODY()m4_dnl
item->fl$1 = f_linearize(whati->f$1);
item->fl$1 = f_linearize(whati->f$1, $2);
FID_SAME_BODY()m4_dnl
if (!f_same(f1->fl$1, f2->fl$1)) return 0;
FID_ITERATE_BODY()m4_dnl
@@ -568,7 +568,7 @@ FID_WR_PUT(8)
}
struct f_line *
f_linearize_concat(const struct f_inst * const inst[], uint count)
f_linearize_concat(const struct f_inst * const inst[], uint count, uint results)
{
uint len = 0;
for (uint i=0; i<count; i++)
@@ -580,6 +580,8 @@ f_linearize_concat(const struct f_inst * const inst[], uint count)
for (uint i=0; i<count; i++)
out->len = linearize(out, inst[i], out->len);
out->results = results;
#ifdef LOCAL_DEBUG
f_dump_line(out, 0);
#endif