[SPIRV] Test file for memcpy intrinsic (#151657)

Test lowering of llvm.memcpy intrinsics to OpCopyMemorySized with
alignment.

Author: EbinJose2002

llvm/test/CodeGen/SPIRV/llvm-intrinsics/memcpy.align.ll

@@ -0,0 +1,54 @@
+; 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 %}
+
+%struct.B = type { [2 x i32] }
+%struct.A = type { i64, %struct.B }
+
+@__const.foo.b = private unnamed_addr addrspace(2) constant %struct.B { [2 x i32] [i32 1, i32 2] }, align 4
+@__const.bar.a = private unnamed_addr addrspace(2) constant %struct.A { i64 0, %struct.B { [2 x i32] [i32 1, i32 2] } }, align 8
+
+define spir_func void @foo(%struct.A* noalias sret(%struct.A) %agg.result) {
+entry:
+  %b = alloca %struct.B, align 4
+  %0 = bitcast %struct.B* %b to i8*
+  call void @llvm.lifetime.start.p0i8(i64 8, i8* %0)
+  %1 = bitcast %struct.B* %b to i8*
+  call void @llvm.memcpy.p0i8.p2i8.i32(i8* align 4 %1, i8 addrspace(2)* align 4 bitcast (%struct.B addrspace(2)* @__const.foo.b to i8 addrspace(2)*), i32 8, i1 false)
+; CHECK: OpCopyMemorySized %[[#]] %[[#]] %[[#]] Aligned 4
+  %b1 = getelementptr inbounds %struct.A, %struct.A* %agg.result, i32 0, i32 1
+  %2 = bitcast %struct.B* %b1 to i8*
+  %3 = bitcast %struct.B* %b to i8*
+  call void @llvm.memcpy.p0i8.p0i8.i32(i8* align 8 %2, i8* align 4 %3, i32 8, i1 false)
+; CHECK: %[[#PTR1:]] = OpInBoundsPtrAccessChain %[[#]] %[[#]] %[[#]] %[[#]]
+; CHECK: OpCopyMemorySized %[[#PTR1]] %[[#]] %[[#]] Aligned 8
+  %4 = bitcast %struct.B* %b to i8*
+  call void @llvm.lifetime.end.p0i8(i64 8, i8* %4)
+  ret void
+}
+
+declare void @llvm.lifetime.start.p0i8(i64, i8* captures(none))
+
+declare void @llvm.memcpy.p0i8.p2i8.i32(i8* captures(none) writeonly, i8 addrspace(2)* captures(none) readonly, i32, i1)
+
+declare void @llvm.memcpy.p0i8.p0i8.i32(i8* captures(none) writeonly, i8* captures(none) readonly, i32, i1)
+
+declare void @llvm.lifetime.end.p0i8(i64, i8* captures(none))
+
+define spir_func void @bar(%struct.B* noalias sret(%struct.B) %agg.result) {
+entry:
+  %a = alloca %struct.A, align 8
+  %0 = bitcast %struct.A* %a to i8*
+  call void @llvm.lifetime.start.p0i8(i64 16, i8* %0)
+  %1 = bitcast %struct.A* %a to i8*
+  call void @llvm.memcpy.p0i8.p2i8.i32(i8* align 8 %1, i8 addrspace(2)* align 8 bitcast (%struct.A addrspace(2)* @__const.bar.a to i8 addrspace(2)*), i32 16, i1 false)
+; CHECK: OpCopyMemorySized %[[#]] %[[#]] %[[#]] Aligned 8
+  %b = getelementptr inbounds %struct.A, %struct.A* %a, i32 0, i32 1
+  %2 = bitcast %struct.B* %agg.result to i8*
+  %3 = bitcast %struct.B* %b to i8*
+  call void @llvm.memcpy.p0i8.p0i8.i32(i8* align 4 %2, i8* align 8 %3, i32 8, i1 false)
+; CHECK: %[[#PTR2:]] = OpInBoundsPtrAccessChain %[[#]] %[[#]] %[[#]] %[[#]]
+; CHECK: OpCopyMemorySized %[[#]] %[[#PTR2]] %[[#]] Aligned 4
+  %4 = bitcast %struct.A* %a to i8*
+  call void @llvm.lifetime.end.p0i8(i64 16, i8* %4)
+  ret void
+}