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from 7cbe41d35e6 middle-end: Don't apply copysign optimization if target doe [...] new 52e809d5cf3 RISC-V: T-HEAD: Add support for the XTheadInt ISA extension

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Summary of changes: gcc/config/riscv/riscv-protos.h | 3 + gcc/config/riscv/riscv.cc | 61 +++++++++++++++-- gcc/config/riscv/riscv.h | 3 + gcc/config/riscv/riscv.md | 4 ++ gcc/config/riscv/thead.cc | 77 ++++++++++++++++++++++ gcc/config/riscv/thead.md | 67 +++++++++++++++++++ .../gcc.target/riscv/xtheadint-push-pop.c | 36 ++++++++++ 7 files changed, 247 insertions(+), 4 deletions(-) create mode 100644 gcc/testsuite/gcc.target/riscv/xtheadint-push-pop.c