abhina-sree wrote:
> There seems to be no Sema test for any error cases.
>
> For example, the diagnostic for the following (which _should not_ refer to
> the "literal encoding"):
>
> ```c++
> long inline_asm(long a, long b) {
> asm("\tLGR %0, %[\N{LATIN CAPITAL LETTER I WITH DOT ABOVE}]\n"
> : "=r"(a)
> : [\N{LATIN CAPITAL LETTER I WITH DOT ABOVE}] "r"(b)
> );
> }
> ```
I've now added this testcase and made the diagnostic message generic so it can
be used for both asm and literal encodings.
I
> > So if getfoo() is called anywhere else it will be in the literal encoding
> > and match the asm string as well.
>
> The case that is not tested is the one where a string that is "physically
> present" in the inline asm is passed to a constexpr function to produce the
> asm string. It may be mildly surprising that numeric escape sequences don't
> work the same inside the parentheses for the constant expression.
I've expanded systemz-charset.cpp testcase to include this as well
https://github.com/llvm/llvm-project/pull/169803
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