Allow all addrspace casts for @llvm.used

.

Author: KorovinVlad

IGC/VectorCompiler/lib/GenXCodeGen/ConstantEncoder.cpp

@@ -1,6 +1,6 @@
 /*========================== begin_copyright_notice ============================
 
-Copyright (C) 2021-2023 Intel Corporation
+Copyright (C) 2021-2024 Intel Corporation
 
 SPDX-License-Identifier: MIT
 
@@ -93,6 +93,23 @@ encodeConstExprImpl(const IGCLLVM::AddrSpaceCastOperator &ASC,
     return {Data, Relocs};
   }
 
+  // The invalid addrspace conversions may appear in @llvm.used or
+  // @llvm.compiler.used arrays until LLVM17: https://reviews.llvm.org/D144518.
+  // Just skip them.
+  bool IsOnlyInLLVMUsed = llvm::all_of(ASC.uses(), [](const Use &U) {
+    const auto *C = dyn_cast<Constant>(U.getUser());
+    if (!C)
+      return false;
+    return llvm::all_of(C->uses(), [](const Use &UU) {
+      if (const auto *GV = dyn_cast<GlobalVariable>(UU.getUser()))
+        return GV->getName() == "llvm.used" ||
+               GV->getName() == "llvm.compiler.used";
+      return false;
+    });
+  });
+  if (IsOnlyInLLVMUsed)
+    return {Data, Relocs};
+
   vc::diagnose(
       ASC.getContext(), "ConstantEncoder",
       "such addrspacecast constant expression is not supported or illegal",

IGC/VectorCompiler/test/OCLRuntimeInfo/gv_used.ll

@@ -0,0 +1,57 @@
+;=========================== begin_copyright_notice ============================
+;
+; Copyright (C) 2024 Intel Corporation
+;
+; SPDX-License-Identifier: MIT
+;
+;============================ end_copyright_notice =============================
+
+; RUN: llc %s -march=genx64 -mcpu=Gen9 -mattr=+ocl_runtime -vc-analyze=GenXOCLRuntimeInfo \
+; RUN: -vc-choose-pass-manager-override=false -o /dev/null 2>&1 | FileCheck %s
+
+target datalayout = "e-p:64:64-i64:64-n8:16:32"
+target triple = "spir64-unknown-unknown"
+
+%user.type = type { [1 x i32] }
+
+; CHECK: ModuleInfo:
+; CHECK: Constant
+; CHECK: Data:
+; CHECK: Buffer: [
+@GV = internal addrspace(1) constant [2 x %user.type] [%user.type zeroinitializer, %user.type { [1 x i32] [i32 2139095040] }], align 4
+; CHECK-SAME: 0, 0, 0, 0, 0, 0, 128, 127,
+; CHECK: ]
+; CHECK: Symbols:
+; CHECK-NEXT: - s_type:   S_GLOBAL_VAR_CONST
+; CHECK-NEXT:   s_offset: 0
+; CHECK-NEXT:   s_size:   8
+; CHECK-NEXT:   s_name:   GV
+
+@reloc = internal addrspace(1) constant i8 addrspace(4)* addrspacecast (i8 addrspace(1)* bitcast ([2 x %user.type] addrspace(1)* @GV to i8 addrspace(1)*) to i8 addrspace(4)*), align 8
+@llvm.compiler.used = appending global [1 x i8*] [i8* addrspacecast (i8 addrspace(1)* bitcast (i8 addrspace(4)* addrspace(1)* @reloc to i8 addrspace(1)*) to i8*)]
+
+; Function Attrs: noinline nounwind
+define dllexport spir_kernel void @test_kernel(i64 %privBase) local_unnamed_addr #0 {
+  ret void
+}
+
+attributes #0 = { noinline nounwind "CMGenxMain" "VCFunction" "VCNamedBarrierCount"="0" "VCSLMSize"="0" }
+
+!llvm.module.flags = !{!0, !1}
+!llvm.dbg.cu = !{!2}
+!opencl.enable.FP_CONTRACT = !{}
+!genx.kernels = !{!6}
+!genx.kernel.internal = !{!10}
+
+!0 = !{i32 2, !"Dwarf Version", i32 4}
+!1 = !{i32 2, !"Debug Info Version", i32 3}
+!2 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !3, producer: "spirv", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !4)
+!3 = !DIFile(filename: "kernel_genx.cpp", directory: "/the_directory/")
+!4 = !{}
+!5 = !{}
+!6 = !{void (i64)* @test_kernel, !"test_kernel", !7, i32 0, !8, !5, !9, i32 0}
+!7 = !{i32 96}
+!8 = !{i32 0}
+!9 = !{}
+!10 = !{void (i64)* @test_kernel, !11, !11, null, !11}
+!11 = !{i32 0}