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6667595: Set probability FAIR for pre-, post- loops and ALWAYS for main loop

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Fix loop's probability. Add optimizations to avoid spilling. Change InlineSmallCode to product flag.

Reviewed-by: never
This commit is contained in:
Vladimir Kozlov 2008-10-02 08:37:44 -07:00
parent 453d1a42b0
commit adce6fc49a
9 changed files with 156 additions and 49 deletions
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8
hotspot/src/share/vm/opto/subnode.cpp
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@ -206,6 +206,14 @@ Node *SubINode::Ideal(PhaseGVN *phase, bool can_reshape){
if( op1 == Op_AddI && op2 == Op_AddI && in1->in(2) == in2->in(2) )
return new (phase->C, 3) SubINode( in1->in(1), in2->in(1) );
// Convert "(A+X) - (X+B)" into "A - B"
if( op1 == Op_AddI && op2 == Op_AddI && in1->in(2) == in2->in(1) )
return new (phase->C, 3) SubINode( in1->in(1), in2->in(2) );
// Convert "(X+A) - (B+X)" into "A - B"
if( op1 == Op_AddI && op2 == Op_AddI && in1->in(1) == in2->in(2) )
return new (phase->C, 3) SubINode( in1->in(2), in2->in(1) );
// Convert "A-(B-C)" into (A+C)-B", since add is commutative and generally
// nicer to optimize than subtract.
if( op2 == Op_SubI && in2->outcnt() == 1) {