Create PQR instruction class (#81) #216

Job	Run time
abi-dump-setup	49s
Test lld / Lit Tests (ubuntu-latest)	11m 25s
Build lldb / Lit Tests (ubuntu-latest)	26m 11s
Test llvm,clang,libclc / Lit Tests (ubuntu-latest)	48m 25s
Test lld / Lit Tests (windows-2019)	2m 20s
Build lldb / Lit Tests (windows-2019)	1m 33s
Test llvm,clang,libclc / Lit Tests (windows-2019)	1m 20s
Test lld / Lit Tests (macOS-latest)	1h 7m 20s
Build lldb / Lit Tests (macOS-latest)	1h 52m 23s
Test llvm,clang,libclc / Lit Tests (macOS-latest)	4h 7m 10s
abi-dump (build-baseline)	29m 23s
abi-dump (build-latest)	30m 40s
abi-compare	33s
	9h 39m 32s

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