JIT

GH-138245: Perform boolean guards by testing a single bit, rather than a full pointer comparison. #5066

Job	Run time
Interpreter (Debug)	11m 2s
JIT without optimizations (Debug) (21)	13m 22s
JIT with tail calling interpreter (21)	4m 27s
Free-Threaded (Debug) (21)	17m 45s
aarch64-pc-windows-msvc/msvc (Debug)	23m 34s
x86_64-pc-windows-msvc/msvc (Release)	14m 24s
i686-pc-windows-msvc/msvc (Debug)	25m 48s
x86_64-pc-windows-msvc/msvc (Debug)	25m 31s
x86_64-apple-darwin/clang (Debug)	25m 51s
i686-pc-windows-msvc/msvc (Release)	14m 17s
x86_64-unknown-linux-gnu/gcc (Release)	8m 29s
aarch64-apple-darwin/clang (Debug)	16m 49s
x86_64-unknown-linux-gnu/gcc (Debug)	13m 58s
aarch64-unknown-linux-gnu/gcc (Release)	6m 46s
aarch64-apple-darwin/clang (Release)	12m 57s
x86_64-apple-darwin/clang (Release)	25m 43s
aarch64-unknown-linux-gnu/gcc (Debug)	8m 39s
aarch64-pc-windows-msvc/msvc (Release)	19m 52s
	4h 49m 14s

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