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[Patch ARM] Fix PR81863.

From: Ramana Radhakrishnan <ramana dot radhakrishnan at foss dot arm dot com>
To: GCC Patches <gcc-patches at gcc dot gnu dot org>
Date: Tue, 27 Mar 2018 14:40:41 +0100
Subject: [Patch ARM] Fix PR81863.

This has been in my patch stack for quite some time. The problem here
was that we weren't handling arm_word_relocations in
arm_valid_symbolic_address and is the surest fix for this
for GCC8 and GCC7.

Regression tested on arm-none-linux-gnueabihf . Applying to
trunk and backporting to GCC-7 in a day or so.

regards
Ramana

    * config/arm/arm.c (arm_valid_symbolic_address): Handle
arm_word_relocations

    gcc/testsuite

    * gcc.target/arm/pr81863.c: New test.

Attachment: p1(2).txt
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