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[PATCH] PR78255: Make postreload aware of NO_FUNCTION_CSE

Hi,

This patch fixes the issue reported in PR78255 by making postreload
aware it should not be performing CSE on functions if NO_FUNCTION_CSE is
defined to true.

Bootstrap and full regression on arm-none-linux-gnueabihf and
aarch64-unknown-linux-gnu.

Also checked this fixed the reported issue on arm-none-eabi.

Is this OK for trunk?

Cheers,
Andre

gcc/ChangeLog
2016-12-09  Andre Vieira <andre.simoesdiasvieira@arm.com>

        PR rtl-optimization/78255
        * gcc/postreload.c (reload_cse_simplify): Do not CSE a function if
        NO_FUNCTION_CSE is true.

gcc/testsuite/ChangeLog:
2016-12-09  Andre Vieira <andre.simoesdiasvieira@arm.com>

        PR rtl-optimization/78255
        * gcc.target/arm/pr78255-1.c: New.
        * gcc.target/arm/pr78255-2.c: New.


gcc/testsuite/ChangeLog:
2016-12-09  Andre Vieira <andre.simoesdiasvieira@arm.com>

        PR rtl-optimization/78255
        * gcc.target/aarch64/pr78255.c: New.

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