add infer as test

Author: abhilash1910

llvm/test/CodeGen/NVPTX/prefetch-inferas-test.ll

@@ -0,0 +1,78 @@
+; RUN: opt < %s -S -passes=infer-address-spaces | FileCheck %s --check-prefix=INFER
+; RUN: llc < %s -mtriple=nvptx64 -mcpu=sm_90 -mattr=+ptx80 | FileCheck %s --check-prefix=PTX
+; RUN: %if ptxas %{ llc < %s -mtriple=nvptx64 -mcpu=sm_90 -mattr=+ptx80 | %ptxas-verify %}
+
+target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v16:16:16-v32:32:32-v64:64:64-v128:128:128-n16:32:64"
+target triple = "nvptx64-unknown-unknown"
+
+@constant_tensormap = addrspace(4) global [64 x i8] zeroinitializer, align 64
+
+; Inference from const address space
+define void @test_infer_const_from_cast() {
+; INFER-LABEL: @test_infer_const_from_cast
+; INFER: call void @llvm.nvvm.prefetch.tensormap.p4(ptr addrspace(4) @constant_tensormap)
+; BOTH: call void @llvm.nvvm.prefetch.tensormap.p4(ptr addrspace(4) @constant_tensormap)
+; PTX-LABEL: .visible .func test_infer_const_from_cast(
+; PTX: mov.b64 %rd{{[0-9]+}}, constant_tensormap;
+; PTX: cvta.const.u64 %rd{{[0-9]+}}, %rd{{[0-9]+}};
+; PTX: prefetch.tensormap [%rd{{[0-9]+}}];
+entry:
+  %casted = addrspacecast ptr addrspace(4) @constant_tensormap to ptr
+  call void @llvm.nvvm.prefetch.tensormap.p0(ptr %casted)
+  ret void
+}
+
+; Cast from Const space to Generic
+define void @test_const_to_generic_cast(ptr addrspace(4) %const_ptr) {
+; INFER-LABEL: @test_const_to_generic_cast
+; INFER: call void @llvm.nvvm.prefetch.tensormap.p4(ptr addrspace(4) %const_ptr)
+; PTX-LABEL: .visible .func test_const_to_generic_cast(
+; PTX: prefetch.const.tensormap [%rd{{[0-9]+}}];
+entry:
+  %cast = addrspacecast ptr addrspace(4) %const_ptr to ptr
+  call void @llvm.nvvm.prefetch.tensormap.p0(ptr %cast)
+  ret void
+}
+
+; No inference possible 
+define void @test_no_inference_possible(ptr %generic_ptr) {
+; INFER-LABEL: @test_no_inference_possible
+; INFER: call void @llvm.nvvm.prefetch.tensormap.p0(ptr %generic_ptr)
+; PTX-LABEL: .visible .func test_no_inference_possible(
+; PTX: prefetch.tensormap [%rd{{[0-9]+}}]; 
+entry:
+  call void @llvm.nvvm.prefetch.tensormap.p0(ptr %generic_ptr)
+  ret void
+}
+
+; Cast from Parameter space to Generic
+define void @test_param_to_generic_cast(ptr addrspace(101) %param_ptr) {
+; INFER-LABEL: @test_param_to_generic_cast
+; INFER: call void @llvm.nvvm.prefetch.tensormap.p101(ptr addrspace(101) %param_ptr)
+; PTX-LABEL: .visible .func test_param_to_generic_cast(
+; PTX: prefetch.param.tensormap [%rd{{[0-9]+}}];
+entry:
+  %cast = addrspacecast ptr addrspace(101) %param_ptr to ptr
+  call void @llvm.nvvm.prefetch.tensormap.p0(ptr %cast)
+  ret void
+}
+
+; Multiple casts in sequence
+define void @test_infer_through_multiple_casts() {
+; INFER-LABEL: @test_infer_through_multiple_casts
+; INFER: call void @llvm.nvvm.prefetch.tensormap.p4(ptr addrspace(4) @constant_tensormap)
+; PTX-LABEL: .visible .func test_infer_through_multiple_casts(
+; PTX: mov.b64 %rd{{[0-9]+}}, constant_tensormap;
+; PTX: cvta.const.u64 %rd{{[0-9]+}}, %rd{{[0-9]+}};
+; PTX: prefetch.tensormap [%rd{{[0-9]+}}];
+entry:
+  %cast1 = addrspacecast ptr addrspace(4) @constant_tensormap to ptr
+  %cast2 = addrspacecast ptr %cast1 to ptr addrspace(4)
+  %cast3 = addrspacecast ptr addrspace(4) %cast2 to ptr
+  call void @llvm.nvvm.prefetch.tensormap(ptr %cast3)
+  ret void
+}
+
+declare void @llvm.nvvm.prefetch.tensormap.p0(ptr)
+declare void @llvm.nvvm.prefetch.tensormap.p4(ptr addrspace(4))
+declare void @llvm.nvvm.prefetch.tensormap.p101(ptr addrspace(101))