llvm-upgrade folds constant expressions

[llvmbot]

Bugzilla Link	1156
Resolution	WONTFIX
Resolved on	Mar 06, 2010 14:00
Version	trunk
OS	All
Reporter	LLVM Bugzilla Contributor

Extended Description

Because llvm-upgrade is now using VMCore for its representation, it gets all
constants that it creates folded automatically. This doesn't cause any semantic
problems but also doesn't lead to an apples-to-apples translation. For example:

%D = ashr int %X, ubyte trunc ( int shl (int 3, ubyte 1) to ubyte )

becomes

%D = ashr int %X, ubyte 6

It's unclear whether this should be fixed or not. Its also unclear how to fix
it unless we add a "-disable-constant-folding" switch to vmcore.

[lattner]

Sounds like not-a-problem to me.

-chris

[llvmbot]

Not worth fixing.