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[Patch, ARM] Fix ICE when high register is used as pic base register for thumb1 target

From: "Terry Guo" <terry dot guo at arm dot com>
To: "Richard Earnshaw" <Richard dot Earnshaw at arm dot com>, "Ramana Radhakrishnan" <ramana dot radhakrishnan at arm dot com>
Cc: <gcc-patches at gcc dot gnu dot org>
Date: Tue, 26 Nov 2013 12:18:02 +0800
Subject: [Patch, ARM] Fix ICE when high register is used as pic base register for thumb1 target
Authentication-results: sourceware.org; auth=none

Hi,

This patch intends to fix ICE when high register is used for pic base
register for thumb1 target. Tested with gcc regression test, no new
regressions. Is it OK to trunk?

BR,
Terry

gcc/ChangeLog:

2013-11-26  Terry Guo  <terry.guo@arm.com>

        * config/arm/arm.c (require_pic_register): Handle high pic base
register for
        thumb-1.
        (arm_load_pic_register): Also initialize high pic base register.
        * doc/invoke.texi: Update documentation for option -mpic-register.

gcc/testsuite/ChangeLog:

2013-11-26  Terry Guo  <terry.guo@arm.com>

        * gcc.target/arm/thumb1-pic-high.c: New case.
        * gcc.target/arm/thumb1-pic-single-base.c: New case.

Attachment: thumb1-high-pic-base-reg-v1.txt
Description: Text document

Follow-Ups:
- Re: [Patch, ARM] Fix ICE when high register is used as pic base register for thumb1 target
  - From: Richard Earnshaw

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