feat: add float/double comparison tracking to instrumentor

[kyakdan]

Add support for tracing double and float compare instructions

[Copilot]

Pull request overview

Adds float/double comparison tracing to Jazzer’s data-flow instrumentation so value profiling can learn from floating-point compares (including NaN and signed-zero edge cases).

Changes:

• Extend the bytecode instrumentor to wrap DCMP* / FCMP* instructions and report raw float/double bits via existing cmp tracing.
• Add runtime callback wrappers for float/double compare semantics (NaN handling, signed zero) and extend generic comparison tracing to include Float/Double.
• Add/update tests (instrumentation golden expectations, runtime semantics tests, and a new fuzz target) plus update docs to reflect new cmp coverage.

Reviewed changes

Copilot reviewed 10 out of 10 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
tests/src/test/java/com/example/FloatDoubleCmpFuzzer.java	New fuzz target validating float/double compare tracking under value profiling.
tests/BUILD.bazel	Registers the new fuzz target test with value profile enabled.
src/test/java/com/code_intelligence/jazzer/runtime/TraceCmpHooksTest.java	Adds unit tests asserting wrapper semantics for float/double compares.
src/test/java/com/code_intelligence/jazzer/instrumentor/TraceDataFlowInstrumentationTest.kt	Updates expected callback traces to include float/double comparisons (incl. NaN/signed zero).
src/test/java/com/code_intelligence/jazzer/instrumentor/TraceDataFlowInstrumentationTarget.java	Adds float/double comparison cases to exercise new instrumentation paths.
src/test/java/com/code_intelligence/jazzer/instrumentor/MockTraceDataFlowCallbacks.java	Adds mock wrappers for float/double compare instrumentation used by tests.
src/main/java/com/code_intelligence/jazzer/runtime/TraceDataFlowNativeCallbacks.java	Implements float/double wrapper callbacks and extends generic comparison tracing.
src/main/java/com/code_intelligence/jazzer/runtime/TraceCmpHooks.java	Adds hooks for Float/Double compare/compareTo to trace operand bits.
src/main/java/com/code_intelligence/jazzer/instrumentor/TraceDataFlowInstrumentor.kt	Instruments DCMP*/FCMP* and refines IF* skip logic for wrapped compares.
docs/advanced.md	Documents cmp tracing support for float/double.

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[oetr]

LGTM!