[PATCH] D109751: [Clang] Support conversion between PPC double-double and IEEE float128

[Hubert Tong via Phabricator via cfe-commits]

hubert.reinterpretcast added a comment.

It doesn't seem like the cases of implicit conversion that are expected to be allowed have been tested with C++?

  $ ./bin/clang -fsyntax-only -mcpu=pwr9 -mfloat128 -xc -<<<$'__ibm128 x; __float128 y; void f(void) { y = x; }'
  Return:  0x00:0   Tue Nov  9 11:53:23 2021 EST
  $ ./bin/clang -fsyntax-only -mcpu=pwr9 -mfloat128 -xc++ -<<<$'__ibm128 x; __float128 y; void f(void) { y = x; }'
  <stdin>:1:46: error: assigning to '__float128' from incompatible type '__ibm128'
  __ibm128 x; __float128 y; void f(void) { y = x; }
                                               ^
  1 error generated.
  Return:  0x01:1   Tue Nov  9 11:53:43 2021 EST


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  https://reviews.llvm.org/D109751/new/

https://reviews.llvm.org/D109751