[Mlir-commits] [mlir] [MLIR][LLVM] Implement LLVM dialect support for global aliases (PR #125295)

[Christian Ulmann]

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@@ -0,0 +1,45 @@
+; RUN: mlir-translate --import-llvm %s | FileCheck %s
+
+ at foo_alias = alias ptr, ptr @callee
+
+; CHECK: llvm.mlir.alias external @foo_alias {addr_space = 0 : i32} : !llvm.ptr {
+; CHECK:   %0 = llvm.mlir.addressof @callee : !llvm.ptr
+; CHECK:   llvm.return %0 : !llvm.ptr
+; CHECK: }
+
+define internal ptr @callee() {
+entry:
+  ret ptr null
+}
+
+ at zed = global i32 42
+ at foo = alias i32, ptr @zed
+ at foo2 = alias i16, ptr @zed
+
+; CHECK: llvm.mlir.alias external @foo {addr_space = 0 : i32} : i32 {
+; CHECK:   %0 = llvm.mlir.addressof @zed : !llvm.ptr
+; CHECK:   llvm.return %0 : !llvm.ptr
+; CHECK: }
+; CHECK: llvm.mlir.alias external @foo2 {addr_space = 0 : i32} : i16 {
+; CHECK:   %0 = llvm.mlir.addressof @zed : !llvm.ptr
+; CHECK:   llvm.return %0 : !llvm.ptr
+; CHECK: }
+
+ at some_name = constant { [3 x ptr] } { [3 x ptr] [ptr null, ptr null, ptr null] }
+ at _ZTV1D = alias { [3 x ptr] }, ptr @some_name
+
+; CHECK: llvm.mlir.alias external @_ZTV1D {addr_space = 0 : i32} : !llvm.struct<(array<3 x ptr>)> {
+; CHECK:   %0 = llvm.mlir.addressof @some_name : !llvm.ptr
+; CHECK:   llvm.return %0 : !llvm.ptr
+; CHECK: }
+
+ at glob.private = private constant [32 x i32] zeroinitializer
+ at glob = linkonce_odr hidden alias [32 x i32], inttoptr (i64 add (i64 ptrtoint (ptr @glob.private to i64), i64 1234) to ptr)
+
+; CHECK: llvm.mlir.alias linkonce_odr hidden @glob {addr_space = 0 : i32, dso_local} : !llvm.array<32 x i32> {
+; CHECK: %0 = llvm.mlir.constant(1234 : i64) : i64
+; CHECK: %1 = llvm.mlir.addressof @glob.private : !llvm.ptr
+; CHECK: %2 = llvm.ptrtoint %1 : !llvm.ptr to i64
+; CHECK: %3 = llvm.add %2, %0 : i64
+; CHECK: %4 = llvm.inttoptr %3 : i64 to !llvm.ptr
+; CHECK: llvm.return %4 : !llvm.ptr
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Dinistro wrote:

Nit: Missing newline

https://github.com/llvm/llvm-project/pull/125295