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Re: [tree-ssa]: Overlap of variable with same variable?

From: Daniel Berlin <dberlin at dberlin dot org>
To: Daniel Berlin <dberlin at dberlin dot org>
Cc: Andrew MacLeod <amacleod at redhat dot com>,gcc at gcc dot gnu dot org
Date: Thu, 29 May 2003 22:29:40 -0400
Subject: Re: [tree-ssa]: Overlap of variable with same variable?

On Thursday, May 29, 2003, at 07:56 PM, Daniel Berlin wrote:

When I hit the abort, it says there is an overlap between t and var
Except that:

(gdb) p debug_generic_expr (t)
pretmp.389_37
$1 = void
(gdb) p debug_generic_expr (var)
pretmp.389

This is not a possible overlap, they are the same variable.

Strike that, i'm slow today.

It appears it thinks they are both live at the same time when they aren't, in the liveness stuff, so a conflict edge gets added, and the partitions don't get coalesced, and everything goes to hell.

--Dan

References:
- [tree-ssa]: Overlap of variable with same variable?
  - From: Daniel Berlin

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