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from 64f8143dcc8 * toplev.c (output_stack_usage): Turn test on flag_stack_u [...] new 9bb905e734d [ARC] Add peephole rules to combine store/loads into double [...] new 985612d72f9 [ARC] Refurbish and improve prologue/epilogue functions.

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Summary of changes: gcc/ChangeLog | 47 + gcc/common/config/arc/arc-common.c | 1 + gcc/config/arc/arc-protos.h | 2 + gcc/config/arc/arc.c | 1456 +++++++++++++++++++--------- gcc/config/arc/arc.md | 245 +++++ gcc/config/arc/arc.opt | 10 +- gcc/config/arc/predicates.md | 12 + gcc/doc/invoke.texi | 18 +- gcc/testsuite/ChangeLog | 7 + gcc/testsuite/gcc.target/arc/firq-1.c | 8 +- gcc/testsuite/gcc.target/arc/firq-3.c | 14 +- gcc/testsuite/gcc.target/arc/firq-4.c | 12 +- gcc/testsuite/gcc.target/arc/interrupt-6.c | 2 +- 13 files changed, 1370 insertions(+), 464 deletions(-)