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ignore contents of stack location in popNow if the value already resides elsewhere besides the stack

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This commit is contained in:
Joel Dice 2008-06-11 08:47:06 -06:00
parent 633ef83fa1
commit 94f7efc160
1 changed files with 5 additions and 4 deletions
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9
src/compiler.cpp
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@ -1969,22 +1969,23 @@ popNow(Context* c, Stack* stack, unsigned count, bool ignore)
s->pushSite = 0; s->pushSite = 0;
s->pushed = false; s->pushed = false;
if (s->value->reads and (not ignore)) { Value* v = s->value;
if (v->reads and v->sites == 0 and (not ignore)) {
::ignore(c, ignored); ::ignore(c, ignored);
Site* target = targetOrRegister(c, s->value); Site* target = targetOrRegister(c, v);
if (DebugStack) { if (DebugStack) {
fprintf(stderr, "pop %p value: %p target: %p\n", fprintf(stderr, "pop %p value: %p target: %p\n",
s, s->value, target); s, s->value, target);
} }
addSite(c, stack, s->size * BytesPerWord, s->value, target); addSite(c, stack, s->size * BytesPerWord, v, target);
apply(c, Pop, BytesPerWord * s->size, target); apply(c, Pop, BytesPerWord * s->size, target);
} else { } else {
if (DebugStack) { if (DebugStack) {
fprintf(stderr, "ignore %p value: %p\n", s, s->value); fprintf(stderr, "ignore %p value: %p\n", s, v);
} }
ignored += s->size; ignored += s->size;