gohman at apple.com
Mon Apr 19 07:39:30 PDT 2010
On Apr 17, 2010, at 8:42 PM, aparna kotha wrote:
> I had 2 questions for the group.
> 1. In llvm-2.6 I am able to identify sizeof(i8) as a
> SCEVTargetDataType but how can we recover that the size is actually 8.
You need to make TargetData available. The special "sizeof" and
are used to analyze code in a target-independent manner, when the
memory layouts for
types are not known. With TargetData information, ScalarEvolution
will just use integer
constants instead of these special expressions.
> 2. I dont see it in the present doxygen. Has it been discontinued in
> llvm 2.7 ?
Yes. They have been replaced with expressions which compute the same
using lower-level constructs. It's still the case that
ScalarEvolution will use integer
constants if TargetData information is available.
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