[Bug tree-optimization/15813] [3.5 Regression] Throw_2 test case does not work anymore.

["law at redhat dot com" <gcc-bugzilla at gcc dot gnu dot org>]

------- Additional Comments From law at redhat dot com  2004-06-30 15:57 -------
Subject: Re:  [3.5 Regression] Throw_2 test
	case does not work anymore.

On Wed, 2004-06-30 at 02:50, geoffk at gcc dot gnu dot org wrote:
> ------- Additional Comments From geoffk at gcc dot gnu dot org  2004-06-30 08:50 -------
> This is just like a similar problem I'm fixing on Darwin.  The problem is that the unwind info for 
> parseDouble is not completely correct in the presence of asynchronous exceptions; there's one point at 
> which the link register is saved in a GPR (and no longer in the link register) but the unwind info doesn't 
> reflect this.  Patch to follow.
When you've got something to poke at, feel free to send it along.

I guess your explanation makes sense -- the patch which exposed this
bug can certainly change how values are coalesced in the out-of-ssa
pass.  Changing the order of coalescing in turn can change the set
of copies which appear at the RTL level, which could in turn cause
the LR->GPR, use LR to hold some other value behavior we're seeing.
Jeff



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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15813