Test for unsupported dgvpr on w64

Author: rovka

llvm/lib/Target/AMDGPU/SIISelLowering.cpp

@@ -3732,6 +3732,11 @@ SDValue SITargetLowering::LowerCall(CallLoweringInfo &CLI,
         return lowerUnhandledCall(CLI, InVals, "Expected 3 additional args");
       }
 
+      if (!Subtarget->isWave32()) {
+        return lowerUnhandledCall(
+            CLI, InVals, "Dynamic VGPR mode is only supported for wave32");
+      }
+
       UsesDynamicVGPRs = true;
       std::for_each(CLI.Args.begin() + ChainCallArgIdx::NumVGPRs,
                     CLI.Args.end(), PushNodeOrTargetConstant);

llvm/test/CodeGen/AMDGPU/unsupported-cs-chain.ll

@@ -0,0 +1,11 @@
+; RUN: not --crash llc -mtriple=amdgcn--amdpal -mcpu=gfx1200 -global-isel=1 -mattr=+wavefrontsize64 -verify-machineinstrs=0 < %s 2>&1 | FileCheck %s
+; RUN: not llc -mtriple=amdgcn--amdpal -mcpu=gfx1200 -global-isel=0 -mattr=+wavefrontsize64 -verify-machineinstrs=0 < %s 2>&1 | FileCheck %s
+
+declare amdgpu_cs_chain void @callee() nounwind
+
+; CHECK: in function test_dvgpr void (): Dynamic VGPR mode is only supported for wave32
+define amdgpu_cs_chain void @test_dvgpr() {
+  call void(ptr, i64, i32, i32, i32, ...) @llvm.amdgcn.cs.chain(ptr @callee, i64 -1, i32 inreg 1, i32 2, i32 1, i32 inreg 32, i32 inreg -1, ptr @callee)
+  unreachable
+}
+