Mercurial > hg > graal-compiler
diff src/share/vm/opto/postaloc.cpp @ 400:cc80376deb0c
6667595: Set probability FAIR for pre-, post- loops and ALWAYS for main loop
Summary: Fix loop's probability. Add optimizations to avoid spilling. Change InlineSmallCode to product flag.
Reviewed-by: never
| author | kvn |
|---|---|
| date | Thu, 02 Oct 2008 08:37:44 -0700 |
| parents | d1605aabd0a1 |
| children | 98cb887364d3 |
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--- a/src/share/vm/opto/postaloc.cpp Tue Sep 30 15:53:55 2008 -0700 +++ b/src/share/vm/opto/postaloc.cpp Thu Oct 02 08:37:44 2008 -0700 @@ -34,7 +34,7 @@ #endif } -//------------------------------may_be_copy_of_callee----------------------------- +//---------------------------may_be_copy_of_callee----------------------------- // Check to see if we can possibly be a copy of a callee-save value. bool PhaseChaitin::may_be_copy_of_callee( Node *def ) const { // Short circuit if there are no callee save registers @@ -225,6 +225,20 @@ // Scan all registers to see if this value is around already for( uint reg = 0; reg < (uint)_max_reg; reg++ ) { + if (reg == (uint)nk_reg) { + // Found ourselves so check if there is only one user of this + // copy and keep on searching for a better copy if so. + bool ignore_self = true; + x = n->in(k); + DUIterator_Fast imax, i = x->fast_outs(imax); + Node* first = x->fast_out(i); i++; + while (i < imax && ignore_self) { + Node* use = x->fast_out(i); i++; + if (use != first) ignore_self = false; + } + if (ignore_self) continue; + } + Node *vv = value[reg]; if( !single ) { // Doubles check for aligned-adjacent pair if( (reg&1)==0 ) continue; // Wrong half of a pair