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

[Gregory Fong]

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 -c 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.

[Maxim Kuvyrkov (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).

[Maxim Kuvyrkov (maxim-kuvyrkov)]

We track Linaro toolchain bugs on bugs.linaro.org. Please report future bugs there directly.

This is now https://bugs.linaro.org/show_bug.cgi?id=307

[Gregory Fong (gvfong)]

Thanks for adding that Maxim, I didn't know that Linaro had a new bug tracker.

[Maxim Kuvyrkov (maxim-kuvyrkov)]

Also confirmed on linaro-4.8-branch as of yesterday

[Kumar Venkataramanan (venkataramanan-kumar)]

Reproduced the bug with cbuild2 on linaro-4.8-branch with options -mtune=cortex-a15 -mfpu=neon -marm -O2

[Kumar Venkataramanan (venkataramanan-kumar)]

Please see https://bugs.linaro.org/show_bug.cgi?id=307 for the bug triage details

[Kumar Venkataramanan (venkataramanan-kumar)]

Fixed by backporting trunk r205807.

Reference: https://bugs.linaro.org/show_bug.cgi?id=307