add a reproducer

Author: VyacheslavLevytskyy

llvm/test/CodeGen/SPIRV/pointers/ptr-eq-types.ll

@@ -0,0 +1,33 @@
+; This test case ensures that several references to "null" in the same function
+; don't break validity of the output code from the perspective of type inference.
+
+; RUN: llc -verify-machineinstrs -O0 -mtriple=spirv64-unknown-unknown %s -o - | FileCheck %s
+; RUN: %if spirv-tools %{ llc -O0 -mtriple=spirv64-unknown-unknown %s -o - -filetype=obj | spirv-val %}
+
+; RUN: llc -verify-machineinstrs -O0 -mtriple=spirv32-unknown-unknown %s -o - | FileCheck %s
+; RUN: %if spirv-tools %{ llc -O0 -mtriple=spirv32-unknown-unknown %s -o - -filetype=obj | spirv-val %}
+
+; CHECK: OpInBoundsPtrAccessChain
+; CHECK: OpPtrCastToGeneric
+; CHECK: OpGenericCastToPtr
+; CHECK: OpPtrEqual
+; CHECK: OpInBoundsPtrAccessChain
+; CHECK: OpGenericCastToPtr
+; CHECK: OpPtrEqual
+
+define spir_kernel void @foo(ptr addrspace(3) align 4 %_arg_local, ptr addrspace(1) align 4 %_arg_global) {
+entry:
+  %p1 = getelementptr inbounds i32, ptr addrspace(1) %_arg_global, i64 0
+  %p2 = getelementptr inbounds i32, ptr addrspace(3) %_arg_local, i64 0
+  store i32 0, ptr addrspace(3) %p2, align 4
+  %p3 = getelementptr inbounds i32, ptr addrspace(1) %p1, i64 0
+  %p4 = addrspacecast ptr addrspace(1) %p3 to ptr addrspace(4)
+  %p5 = tail call spir_func ptr addrspace(3) @_Z40__spirv_GenericCastToPtrExplicit_ToLocalPvi(ptr addrspace(4) %p4, i32 4)
+  %b1 = icmp eq ptr addrspace(3) %p5, null
+  %p6 = getelementptr inbounds i32, ptr addrspace(3) %p5, i64 0
+  %p7 = tail call spir_func ptr addrspace(3) @_Z40__spirv_GenericCastToPtrExplicit_ToLocalPvi(ptr addrspace(4) %p4, i32 4)
+  %b2 = icmp eq ptr addrspace(3) %p7, null
+  ret void
+}
+
+declare dso_local spir_func ptr addrspace(3) @_Z40__spirv_GenericCastToPtrExplicit_ToLocalPvi(ptr addrspace(4), i32)