AMDGPU: Do not assert on v6x16 buffer load intrinsics (#94966)

Just use the original type and let it hit a standard legalization error.

Author: arsenm

llvm/lib/Target/AMDGPU/AMDGPUISelLowering.cpp

@@ -42,8 +42,10 @@ EVT AMDGPUTargetLowering::getEquivalentMemType(LLVMContext &Ctx, EVT VT) {
   if (StoreSize <= 32)
     return EVT::getIntegerVT(Ctx, StoreSize);
 
-  assert(StoreSize % 32 == 0 && "Store size not a multiple of 32");
-  return EVT::getVectorVT(Ctx, MVT::i32, StoreSize / 32);
+  if (StoreSize % 32 == 0)
+    return EVT::getVectorVT(Ctx, MVT::i32, StoreSize / 32);
+
+  return VT;
 }
 
 unsigned AMDGPUTargetLowering::numBitsUnsigned(SDValue Op, SelectionDAG &DAG) {

llvm/test/CodeGen/AMDGPU/llvm.amdgcn.raw.ptr.buffer.load.bf16.xfail.ll

@@ -0,0 +1,8 @@
+; RUN: not --crash llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx900 -filetype=null %s 2>&1 | FileCheck %s
+
+; CHECK: LLVM ERROR: Do not know how to widen the result of this operator!
+
+define <6 x bfloat> @raw_ptr_buffer_load_v6bf16(ptr addrspace(8) inreg %rsrc) {
+  %val = call <6 x bfloat> @llvm.amdgcn.raw.ptr.buffer.load.v6bf16(ptr addrspace(8) %rsrc, i32 0, i32 0, i32 0)
+  ret <6 x bfloat> %val
+}

llvm/test/CodeGen/AMDGPU/llvm.amdgcn.raw.ptr.buffer.store.bf16.xfail.ll

@@ -0,0 +1,11 @@
+; RUN: not --crash llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx900 -filetype=null %s 2>&1 | FileCheck %s
+
+; FIXME: This should be handled
+
+; CHECK: LLVM ERROR: Do not know how to widen this operator's operand!
+
+
+define void @buffer_store_v6bf16(ptr addrspace(8) inreg %rsrc, <6 x bfloat> %data, i32 %offset) {
+  call void @llvm.amdgcn.raw.ptr.buffer.store.v6bf16(<6 x bfloat> %data, ptr addrspace(8) %rsrc, i32 %offset, i32 0, i32 0)
+  ret void
+}