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JIT: Remove fallthrough constraint for BBJ_SWITCH -> BBJ_COND conversion #105651

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Jul 30, 2024
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JIT: Remove fallthrough constraint for BBJ_SWITCH -> BBJ_COND conversion #105651

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6 changes: 2 additions & 4 deletions src/coreclr/jit/fgopt.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -1775,12 +1775,10 @@ bool Compiler::fgOptimizeSwitchBranches(BasicBlock* block)

return true;
}
else if ((block->GetSwitchTargets()->bbsCount == 2) &&
block->NextIs(block->GetSwitchTargets()->bbsDstTab[1]->getDestinationBlock()))
else if (block->GetSwitchTargets()->bbsCount == 2)
{
/* Use a BBJ_COND(switchVal==0) for a switch with only one
significant clause besides the default clause, if the
default clause is bbNext */
significant clause besides the default clause */
GenTree* switchVal = switchTree->AsOp()->gtOp1;
noway_assert(genActualTypeIsIntOrI(switchVal->TypeGet()));

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