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8016157: During CTW: C2: assert(!def_outside->member(r)) failed: Use of external LRG overlaps the same LRG defined in this block

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Disable rematerialization for negD node

Reviewed-by: kvn, roland
This commit is contained in:
Niclas Adlertz 2013-06-14 01:19:56 +02:00
parent d6402d4452
commit 9129e6dc2b
2 changed files with 10 additions and 0 deletions
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9
hotspot/src/share/vm/adlc/formssel.cpp
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@ -235,6 +235,9 @@ bool InstructForm::is_parm(FormDict &globals) {
return false;
}
bool InstructForm::is_ideal_negD() const {
return (_matrule && _matrule->_rChild && strcmp(_matrule->_rChild->_opType, "NegD") == 0);
}
// Return 'true' if this instruction matches an ideal 'Copy*' node
int InstructForm::is_ideal_copy() const {
@ -533,6 +536,12 @@ bool InstructForm::rematerialize(FormDict &globals, RegisterForm *registers ) {
if( data_type != Form::none )
rematerialize = true;
// Ugly: until a better fix is implemented, disable rematerialization for
// negD nodes because they are proved to be problematic.
if (is_ideal_negD()) {
return false;
}
// Constants
if( _components.count() == 1 && _components[0]->is(Component::USE_DEF) )
rematerialize = true;

1
hotspot/src/share/vm/adlc/formssel.hpp
View file

@ -147,6 +147,7 @@ public:
virtual int is_empty_encoding() const; // _size=0 and/or _insencode empty
virtual int is_tls_instruction() const; // tlsLoadP rule or ideal ThreadLocal
virtual int is_ideal_copy() const; // node matches ideal 'Copy*'
virtual bool is_ideal_negD() const; // node matches ideal 'NegD'
virtual bool is_ideal_if() const; // node matches ideal 'If'
virtual bool is_ideal_fastlock() const; // node matches 'FastLock'
virtual bool is_ideal_membar() const; // node matches ideal 'MemBarXXX'