[PATCH] D76848: [CodeGen] Error when writing to reserved registers in inline asm

[Victor Campos via Phabricator via llvm-commits]

vhscampos added a comment.

It is diagnosing the same cases as the similar check present in CodeGen/AsmPrinter/AsmPrinterInlineAsm.cpp, lines 549-585. The latter, however, only covers clobber operands, leaving input and output operands unchecked.

I created these diagnostics in SelectionDAGBuilder.cpp, rather than in AsmPrinterInlineAsm.cpp, because, in the latter, it's too late to catch the case where input operands are reserved registers (i.e. inline asm's "local register variables").

It may diagnose more cases than GCC, but that is simply incidental as I just tried to mimick what is done with clobber registers.


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