DU-chains Vs UD-chains - ReadList.com

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DU-chains Vs UD-chains
\ Fran Baena (15 Apr 2008)
. \ Daniel Berlin (15 Apr 2008)

6 msg	Bootstrap failure on native mingw32
1 msg	bootstrap failure in gcc4.3.1 on hppa2.0w-hp-hp...
1 msg	template parameter does not hide class name
2 msg	A question regarding define_split pattern
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8 msg	[ARM] Lack of __aeabi_fsqrt / __aeabi_dsqrt (sq...

Subject:	DU-chains Vs UD-chains
Group:	Gcc
From:	Fran Baena
Date:	15 Apr 2008

Hi all,

i'm currently studing alias analysis, and i have some questions, for
instance, when are the du/ud-chains calculated? Before translating to
SSA form?
If i'm not wrong the def-use chain connects a definition of a variable
to all the uses it may flow to, and the use-def chain connects a use
to all the definitions that may flow to it. But, what chain is better
for data-flow analysis?
Maybe the answer is both?

Thanks in advance

Fran