[GlobalISel][CallLowering] Add support for splitting types according to calling conventions.
On AArch64, s128 types have to be split into s64 GPRs when passed as arguments.
This change adds the generic support in call lowering for dealing with multiple
registers, for incoming and outgoing args.
Support for splitting for return types not yet implemented.
Differential Revision: https://reviews.llvm.org/D66180
llvm-svn: 370822
diff --git a/llvm/lib/CodeGen/GlobalISel/Utils.cpp b/llvm/lib/CodeGen/GlobalISel/Utils.cpp
index be09db1..a93e515 100644
--- a/llvm/lib/CodeGen/GlobalISel/Utils.cpp
+++ b/llvm/lib/CodeGen/GlobalISel/Utils.cpp
@@ -412,3 +412,20 @@
void llvm::getSelectionDAGFallbackAnalysisUsage(AnalysisUsage &AU) {
AU.addPreserved<StackProtector>();
}
+
+MVT llvm::getMVTForLLT(LLT Ty) {
+ if (!Ty.isVector())
+ return MVT::getIntegerVT(Ty.getSizeInBits());
+
+ return MVT::getVectorVT(
+ MVT::getIntegerVT(Ty.getElementType().getSizeInBits()),
+ Ty.getNumElements());
+}
+
+LLT llvm::getLLTForMVT(MVT Ty) {
+ if (!Ty.isVector())
+ return LLT::scalar(Ty.getSizeInBits());
+
+ return LLT::vector(Ty.getVectorNumElements(),
+ Ty.getVectorElementType().getSizeInBits());
+}