XCOREVBITMANIP builtins added

Created by: MaryBennett

Files Changed: gcc/common/config/riscv:

• riscv-common.cc: Added the XCOREVBITMANIP extension.

gcc/config/riscv:

• constraints.md: Added builtins for the XCOREVBITMANIP extension.
• corev.def: Likewise.
• corev.md: Likewise.
• predicates.md: Likewise.
• riscv-builtins.cc: Likewise.
• riscv-ftypes.def: Likewise.
• riscv-opts.h: Likewise.
• riscv.md: Likewise.

gcc/doc:

• extend.texi: Added documentation for the XCOREVBITMANIP extension builtins.

gcc/testsuite/gcc.target/riscv:

• cv-march-xcorevbitmanip-compile-bclr.c: Added new tests.
• cv-march-xcorevbitmanip-compile-bclrr.c: Likewise.
• cv-march-xcorevbitmanip-compile-bitrev.c: Likewise.
• cv-march-xcorevbitmanip-compile-bset.c: Likewise.
• cv-march-xcorevbitmanip-compile-bsetr.c: Likewise.
• cv-march-xcorevbitmanip-compile-clb.c: Likewise.
• cv-march-xcorevbitmanip-compile-cnt.c: Likewise.
• cv-march-xcorevbitmanip-compile-extract.c: Likewise.
• cv-march-xcorevbitmanip-compile-extractr.c: Likewise.
• cv-march-xcorevbitmanip-compile-extractu.c: Likewise.
• cv-march-xcorevbitmanip-compile-extractur.c: Likewise.
• cv-march-xcorevbitmanip-compile-ff1.c: Likewise.
• cv-march-xcorevbitmanip-compile-fl1.c: Likewise.
• cv-march-xcorevbitmanip-compile-insert.c: Likewise.
• cv-march-xcorevbitmanip-compile-insertr.c: Likewise.
• cv-march-xcorevbitmanip-compile-ror.c: Likewise.
• cv-march-xcorevbitmanip-fail-compile-bclr.c: Likewise.
• cv-march-xcorevbitmanip-fail-compile-bitrev.c: Likewise.
• cv-march-xcorevbitmanip-fail-compile-bset.c: Likewise.
• cv-march-xcorevbitmanip-fail-compile-extract.c: Likewise.
• cv-march-xcorevbitmanip-fail-compile-extractu.c: Likewise.
• cv-march-xcorevbitmanip-fail-compile-insert.c: Likewise.

gcc/testsuite/lib:

• target-supports.exp: Added proc for the XCOREVBITMANIP extension.

==Results==

Category	Previous	With commit	Delta
Expected passes	3681	4299	+618
Unexpected failures	53	53	-
Unexpected successes	-	-	-
Expected failures	6	6	-
Unresolved testcases	6	6	-
Unsupported tests	233	245	+12

Similar to the tests for the hardware loop extension, failure tests using the lto optimisation are marked as unsupported.