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don't bother calling methods which are known do nothing

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This commit is contained in:
Joel Dice 2008-03-10 07:28:21 -06:00
parent 9a0143594a
commit 11dea0ad8e
1 changed files with 20 additions and 9 deletions
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29
src/compile.cpp
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@ -1436,6 +1436,13 @@ resultSize(MyThread* t, unsigned code)
}
}
bool
emptyMethod(MyThread* t, object method)
{
object code = methodCode(t, method);
return (codeLength(t, code) == 1 and codeBody(t, code, 0) == return_);
}
void
compileDirectInvoke(MyThread* t, Frame* frame, object target)
{
@ -1443,15 +1450,19 @@ compileDirectInvoke(MyThread* t, Frame* frame, object target)
unsigned rSize = resultSize(t, methodReturnCode(t, target));
Compiler::Operand* result = c->call
(c->constant
(reinterpret_cast<intptr_t>
(&singletonBody(t, methodCompiled(t, target), 0))),
0,
Compiler::Aligned,
frame->trace(target, false),
rSize,
0);
Compiler::Operand* result = 0;
if (not emptyMethod(t, target)) {
result = c->call
(c->constant
(reinterpret_cast<intptr_t>
(&singletonBody(t, methodCompiled(t, target), 0))),
0,
Compiler::Aligned,
frame->trace(target, false),
rSize,
0);
}
c->popped(methodParameterFootprint(t, target));