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[trans-mem] Fix tm_region association of blocks with the "over" label.

From: Torvald Riegel <triegel at redhat dot com>
To: GCC Patches <gcc-patches at gcc dot gnu dot org>
Cc: Richard Henderson <rth at redhat dot com>, Aldy Hernandez <aldyh at redhat dot com>
Date: Fri, 28 Oct 2011 00:47:10 +0200
Subject: [trans-mem] Fix tm_region association of blocks with the "over" label.

This patch fixes the detection of transactions regions for transactions
that have __transaction_cancel statements. The block that has the "over"
label to which an aborted transaction jumps does not belong to this
transaction, but to the enclosing region. The included testcase would
fail with prior code because the call to unsafe() was incorrectly
considered to be in a transaction.

Bootstrapped and tested on x86_64. OK for branch?

Attachment: patch1
Description: Text document

Follow-Ups:
- Re: [trans-mem] Fix tm_region association of blocks with the "over" label.
  - From: Richard Henderson

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