Mercurial > hg > graal-jvmci-8
diff src/share/vm/opto/memnode.cpp @ 7474:00af3a3a8df4
8005522: use fast-string instructions on x86 for zeroing
Summary: use 'rep stosb' instead of 'rep stosq' when fast-string operations are available.
Reviewed-by: twisti, roland
author | kvn |
---|---|
date | Thu, 03 Jan 2013 15:09:55 -0800 |
parents | d804e148cff8 |
children | b30b3c2a0cf2 |
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--- a/src/share/vm/opto/memnode.cpp Sun Dec 23 17:08:22 2012 +0100 +++ b/src/share/vm/opto/memnode.cpp Thu Jan 03 15:09:55 2013 -0800 @@ -2725,10 +2725,8 @@ zend = phase->transform( new(C) URShiftXNode(zend, shift) ); } + // Bulk clear double-words Node* zsize = phase->transform( new(C) SubXNode(zend, zbase) ); - Node* zinit = phase->zerocon((unit == BytesPerLong) ? T_LONG : T_INT); - - // Bulk clear double-words Node* adr = phase->transform( new(C) AddPNode(dest, dest, start_offset) ); mem = new (C) ClearArrayNode(ctl, mem, zsize, adr); return phase->transform(mem);