[Bug target/39139] [4.4 Regression] ICE with stringop and register var

[ian at airs dot com]

------- Comment #21 from ian at airs dot com  2009-02-09 22:37 -------
I agree with Jakub that the original test case, and the one in comment #7,
appear to conform to the documented gcc extension.  I think that gcc has to
treat this sort of code as valid, and not break it.  We can't casually or
accidentally break our documented extensions.

Unfortunately this means that in a function which contains both local register
variables and an asm, we must severely restrict any code motion which may
involve a function call or the use of hidden registers.  We should explicitly
express a dependency between any asm and any local register variable in scope
for the asm.  That won't solve the problem by itself, though.


-- 

ian at airs dot com changed:

           What    |Removed                     |Added
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                 CC|                            |ian at airs dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39139