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[PATCH] Enhance phiopt to handle BIT_AND_EXPR

From: "Zhenqiang Chen" <zhenqiang dot chen at arm dot com>
To: <gcc-patches at gcc dot gnu dot org>
Date: Mon, 30 Sep 2013 17:29:59 +0800
Subject: [PATCH] Enhance phiopt to handle BIT_AND_EXPR
Authentication-results: sourceware.org; auth=none

Hi,

The patch enhances phiopt to handle cases like:

  if (a == 0 && (...))
    return 0;
  return a;

Boot strap and no make check regression on X86-64 and ARM.

Is it OK for trunk?

Thanks!
-Zhenqiang

ChangeLog:
2013-09-30  Zhenqiang Chen  <zhenqiang.chen@linaro.org>

	* tree-ssa-phiopt.c (operand_equal_for_phi_arg_p_1): New.
	(value_replacement): Move a check to operand_equal_for_phi_arg_p_1.

testsuite/ChangeLog:
2013-09-30  Zhenqiang Chen  <zhenqiang.chen@linaro.org>

	* gcc.dg/tree-ssa/phi-opt-11.c: New test case.

Attachment: phiopt.patch
Description: Binary data

Follow-Ups:
- Re: [PATCH] Enhance phiopt to handle BIT_AND_EXPR
  - From: Andrew Pinski

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