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from 97258480438 middle-end/108500 - replace recursive domtree DFS traversal new ef5f7b89bbc New reg note REG_CFA_NORESTORE new 36ffb2e0293 IBM zSystems: Make stack_tie to work with hard frame pointer new 8091199cdf4 IBM zSystems: Save argument registers to the stack -mpreserve-args

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Summary of changes: gcc/config/s390/s390.cc | 271 ++++++++++++++++-------- gcc/config/s390/s390.md | 5 +- gcc/config/s390/s390.opt | 4 + gcc/dwarf2cfi.cc | 15 +- gcc/reg-notes.def | 5 + gcc/testsuite/gcc.target/s390/preserve-args-1.c | 17 ++ gcc/testsuite/gcc.target/s390/preserve-args-2.c | 19 ++ gcc/testsuite/gcc.target/s390/preserve-args-3.c | 19 ++ 8 files changed, 265 insertions(+), 90 deletions(-) create mode 100644 gcc/testsuite/gcc.target/s390/preserve-args-1.c create mode 100644 gcc/testsuite/gcc.target/s390/preserve-args-2.c create mode 100644 gcc/testsuite/gcc.target/s390/preserve-args-3.c