================
@@ -784,6 +791,20 @@ bool SystemZTargetLowering::useSoftFloat() const {
return Subtarget.hasSoftFloat();
}
+MVT SystemZTargetLowering::getRegisterTypeForCallingConv(
+ LLVMContext &Context, CallingConv::ID CC,
+ EVT VT) const {
+ // 128-bit single-element vector types are passed like other vectors,
+ // not like their element type.
+ if (VT.isVector() && VT.getSizeInBits() == 128 &&
+ VT.getVectorNumElements() == 1)
+ return MVT::v16i8;
+ // Keep f16 so that they can be recognized and handled.
+ if (VT == MVT::f16)
----------------
arsenm wrote:
I assume this is because it's an illegal type. It would be much nicer if
calling convention code just always worked on the original types to begin with
https://github.com/llvm/llvm-project/pull/109164
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