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Remove CHK_FLOW_UPDATE stress mode #122970

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Remove CHK_FLOW_UPDATE stress mode #122970

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918c534
Initial plan
Copilot Jan 7, 2026
fd6c1cf
Remove CHK_FLOW_UPDATE stress mode and associated code
Copilot Jan 7, 2026
54e6058
Keep fgDebugCheckUpdate function, remove only the stress mode check
Copilot Jan 7, 2026
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1 change: 0 additions & 1 deletion src/coreclr/jit/compiler.h
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Expand Up @@ -10441,7 +10441,6 @@ class Compiler
/* don't care about performance at all */ \
\
STRESS_MODE(FORCE_INLINE) /* Treat every method as AggressiveInlining */ \
STRESS_MODE(CHK_FLOW_UPDATE) \
STRESS_MODE(EMITTER) \
STRESS_MODE(CHK_REIMPORT) \
STRESS_MODE(GENERIC_CHECK) \
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5 changes: 0 additions & 5 deletions src/coreclr/jit/fgdiagnostic.cpp
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Expand Up @@ -58,11 +58,6 @@ void Compiler::fgPrintEdgeWeights()

void Compiler::fgDebugCheckUpdate()
{
if (!compStressCompile(STRESS_CHK_FLOW_UPDATE, 30))
{
return;
}

/* We check for these conditions:
* no unreachable blocks -> no blocks have countOfInEdges() = 0
* no empty blocks -> !block->isEmpty(), unless non-removable or multiple in-edges
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