GlobalISel: legalize va_arg on AArch64.

Uses a Custom implementation because the slot sizes being a multiple of the
pointer size isn't really universal, even for the architectures that do have a
simple "void *" va_list.

llvm-svn: 295255

1 files changed, 3 insertions, 0 deletions

diff --git a/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp b/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
index 1f78243e115..6bb64e068ec 100644
--- a/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
+++ b/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
@@ -50,6 +50,9 @@ LegalizerHelper::legalizeInstrStep(MachineInstr &MI,
     return lower(MI, std::get<1>(Action), std::get<2>(Action));
   case LegalizerInfo::FewerElements:
     return fewerElementsVector(MI, std::get<1>(Action), std::get<2>(Action));
+  case LegalizerInfo::Custom:
+    return LegalizerInfo.legalizeCustom(MI, MRI, MIRBuilder) ? Legalized
+                                                             : UnableToLegalize;
   default:
     return UnableToLegalize;
   }