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8074981: Integer/FP scalar reduction optimization

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Add scalar reduction optimization to C2 to take advantage of vector instructions in modern x86 CPUs.

Reviewed-by: kvn, twisti
This commit is contained in:
Michael C Berg 2015-04-01 18:07:50 -07:00 • committed by Vladimir Kozlov
parent 7c5d30b0e3
commit 9e55e44c85
22 changed files with 1599 additions and 20 deletions
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11
hotspot/src/share/vm/adlc/formssel.cpp
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@ -4043,6 +4043,13 @@ int MatchRule::is_expensive() const {
strcmp(opType,"ReplicateL")==0 ||
strcmp(opType,"ReplicateF")==0 ||
strcmp(opType,"ReplicateD")==0 ||
strcmp(opType,"AddReductionVI")==0 ||
strcmp(opType,"AddReductionVL")==0 ||
strcmp(opType,"AddReductionVF")==0 ||
strcmp(opType,"AddReductionVD")==0 ||
strcmp(opType,"MulReductionVI")==0 ||
strcmp(opType,"MulReductionVF")==0 ||
strcmp(opType,"MulReductionVD")==0 ||
0 /* 0 to line up columns nicely */ )
return 1;
}
@ -4135,6 +4142,10 @@ bool MatchRule::is_vector() const {
"MulVS","MulVI","MulVF","MulVD",
"DivVF","DivVD",
"AndV" ,"XorV" ,"OrV",
"AddReductionVI", "AddReductionVL",
"AddReductionVF", "AddReductionVD",
"MulReductionVI",
"MulReductionVF", "MulReductionVD",
"LShiftCntV","RShiftCntV",
"LShiftVB","LShiftVS","LShiftVI","LShiftVL",
"RShiftVB","RShiftVS","RShiftVI","RShiftVL",