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[PATCH PR67909 PR67947]

From: Yuri Rumyantsev <ysrumyan at gmail dot com>
To: gcc-patches <gcc-patches at gcc dot gnu dot org>, Richard Biener <richard dot guenther at gmail dot com>, Igor Zamyatin <izamyatin at gmail dot com>
Date: Tue, 13 Oct 2015 14:57:34 +0300
Subject: [PATCH PR67909 PR67947]
Authentication-results: sourceware.org; auth=none

Hi All,

Here is a simple patch for unswitching outer loop through guard-edge
hoisting. The check that guard-edge is around the inner loop was
missed.

Bootstrapping and regression testing did not show new failures.

Is it OK for trunk?

ChangeLog:
2014-10-13  Yuri Rumyantsev  <ysrumyan@gmail.com>

PR tree-optimization/67909, 67947
* tree-ssa-loop-unswitch.c (find_loop_guard): Add check that GUARD_EDGE
really skip the inner loop.

gcc/testsuite/ChangeLog
* gcc.dg/torture/pr67947.c: New test.

Attachment: patch
Description: Binary data

Follow-Ups:
- Re: [PATCH PR67909 PR67947]
  - From: H.J. Lu

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