[Bug 1349570] Re: ICE in change_address_1, at emit-rtl.c:2019

[Maxim Kuvyrkov]

Thanks for the testcase.  This is reproducible with 4.8 2014.04 (our
latest 4.8), but not with 4.9 2014.06 (didn't test other 4.9 versions).

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Title:
  ICE in change_address_1, at emit-rtl.c:2019

Status in Linaro GCC:
  New
Status in “gcc-4.8-armhf-cross” package in Ubuntu:
  New

Bug description:
  Found when trying to build the v8 javascript engine.
  Reproduced with gcc-linaro 4.8-2014.01 and gcc-linaro 4.8-2014.04.
  Cannot be reproduced with FSF gcc 4.8.2 or gcc 4.9.0.

  $ arm-linux-gnueabihf-g++ -fvisibility=hidden -mtune=cortex-a15 -mfpu=neon -marm -O2 testcase.ii
  testcase.ii: In member function ‘int G::SizeFromMap()’:
  testcase.ii:63:1: internal compiler error: in change_address_1, at emit-rtl.c:2019
   }
   ^

  Removing any of these flags eliminates the error.  Reproducible with -O2 and -O3 but not -O1 or -Os.
  Cannot be reproduced without -mtune=cortex-a15, even if one of -march=armv7ve or -march=armv7-a are provided.
  The problem is not seen with -mthumb (default) instead of -marm.

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