[SelectionDAG][X86] Support inline assembly returning an mmx register into a type with fewer than 64 bits.
It's possible to use the 'y' mmx constraint with a type narrower than 64-bits.
This patch supports this by bitcasting the mmx type to 64-bits and then
truncating to the desired type.
There are probably other missing type combinations we need to support, but this
is the case we have a bug report for.
Fixes PR41748.
Differential Revision: https://reviews.llvm.org/D61582
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@360069
91177308-0d34-0410-b5e6-
96231b3b80d8
projects / llvm / commit