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7063629: use cbcond in C2 generated code on T4

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Use new short branch instruction in C2 generated code.

Reviewed-by: never
This commit is contained in:
Vladimir Kozlov 2011-08-11 12:08:11 -07:00
parent 52f678435a
commit ac99f413d7
20 changed files with 1298 additions and 500 deletions
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28
hotspot/src/share/vm/adlc/formssel.cpp
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@ -1181,6 +1181,34 @@ bool InstructForm::check_branch_variant(ArchDesc &AD, InstructForm *short_branch
strcmp(reduce_result(), short_branch->reduce_result()) == 0 &&
_matrule->equivalent(AD.globalNames(), short_branch->_matrule)) {
// The instructions are equivalent.
// Now verify that both instructions have the same parameters and
// the same effects. Both branch forms should have the same inputs
// and resulting projections to correctly replace a long branch node
// with corresponding short branch node during code generation.
bool different = false;
if (short_branch->_components.count() != _components.count()) {
different = true;
} else if (_components.count() > 0) {
short_branch->_components.reset();
_components.reset();
Component *comp;
while ((comp = _components.iter()) != NULL) {
Component *short_comp = short_branch->_components.iter();
if (short_comp == NULL ||
short_comp->_type != comp->_type ||
short_comp->_usedef != comp->_usedef) {
different = true;
break;
}
}
if (short_branch->_components.iter() != NULL)
different = true;
}
if (different) {
globalAD->syntax_err(short_branch->_linenum, "Instruction %s and its short form %s have different parameters\n", _ident, short_branch->_ident);
}
if (AD._short_branch_debug) {
fprintf(stderr, "Instruction %s has short form %s\n", _ident, short_branch->_ident);
}