1 files changed, 13 insertions, 0 deletions
diff --git a/llvm/lib/Target/WebAssembly/WebAssemblyISelLowering.cpp b/llvm/lib/Target/WebAssembly/WebAssemblyISelLowering.cpp
index 49fb8404b80..0bd2ebdc4bb 100644
--- a/llvm/lib/Target/WebAssembly/WebAssemblyISelLowering.cpp
+++ b/llvm/lib/Target/WebAssembly/WebAssemblyISelLowering.cpp
@@ -174,11 +174,24 @@ WebAssemblyTargetLowering::WebAssemblyTargetLowering(
   //  - Floating-point extending loads.
   //  - Floating-point truncating stores.
   //  - i1 extending loads.
+  //  - extending/truncating SIMD loads/stores
   setLoadExtAction(ISD::EXTLOAD, MVT::f64, MVT::f32, Expand);
   setTruncStoreAction(MVT::f64, MVT::f32, Expand);
   for (auto T : MVT::integer_valuetypes())
     for (auto Ext : {ISD::EXTLOAD, ISD::ZEXTLOAD, ISD::SEXTLOAD})
       setLoadExtAction(Ext, T, MVT::i1, Promote);
+  if (Subtarget->hasSIMD128()) {
+    for (auto T : {MVT::v16i8, MVT::v8i16, MVT::v4i32, MVT::v2i64, MVT::v4f32,
+                   MVT::v2f64}) {
+      for (auto MemT : MVT::vector_valuetypes()) {
+        if (MVT(T) != MemT) {
+          setTruncStoreAction(T, MemT, Expand);
+          for (auto Ext : {ISD::EXTLOAD, ISD::ZEXTLOAD, ISD::SEXTLOAD})
+            setLoadExtAction(Ext, T, MemT, Expand);
+        }
+      }
+    }
+  }
 
   // Trap lowers to wasm unreachable
   setOperationAction(ISD::TRAP, MVT::Other, Legal);