C++: Fix missing global variable flow#20126

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MathiasVP wants to merge 3 commits intogithub:mainfrom

MathiasVP:fix-missing-global-flow

Commits on Jul 25, 2025

C++: Add tests with missing flow through globals.
MathiasVP
committed
C++: Fix missing flow by also generating final global uses for functions that have a post-update node for the global variable.
MathiasVP
committed
C++: Accept test changes.
MathiasVP
committed