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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27000 91177308-0d34-0410-b5e6-96231b3b80d8
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Chris Lattner 2006-03-23 21:28:44 +00:00
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commit 716aefcd91
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10
lib/Target/PowerPC/README.txt
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@ -569,3 +569,13 @@ We could use a target dag combine to turn the lwz/extsw into an lwa when the
lwz has a single use. Since LWA is cracked anyway, this would be a codesize
win only.
===-------------------------------------------------------------------------===
Consider this:
v4f32 Vector;
v4f32 Vector2 = { Vector.X, Vector.X, Vector.X, Vector.X };
Since we know that "Vector" is 16-byte aligned and we know the element offset
of ".X", we should change the load into a lve*x instruction, instead of doing
a load/store/lve*x sequence.