Maybe, maybe not. The bug may still be anywhere in the compiler, either
before that optimization (bad initial code generation) or after that
optimization (a pass not properly handling the output of that optimization),
or in fact the bug may be right there.
So you have done very little to narrow down anything.
What is needed, however, from everyone concerned, are test cases. That is,
self-contained, preprocessed test cases. Along with the exact version of
the compiler in use.
I tried to reproduce the __switch_to bug myself this weekend and failed.
r~
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