https://github.com/maarquitos14 created https://github.com/llvm/llvm-project/pull/222367
The `GlobalVariable` constructor used by `createGlobal` receives a `std::optional<unsigned> AddressSpace` that, when unspecified, falls back to `M.getDataLayout().getDefaultGlobalsAddressSpace()`. However, `createGlobal`'s `AddressSpace` arg was a bare `unsigned` defaulting to 0. By doing that, it was effectively overriding the `GlobalVariable`'s constructor fallback with 0. On targets whose default globals address space is not 0 (AMDGPU, SPIR/SPIR-V), this emitted `@llvm.global_ctors/dtors` in address space 0 causing some issues (see https://github.com/ROCm/SPIRV-LLVM-Translator/issues/293). >From 15459abef2eb53d88fdf8ab6d1682cd69e02a9b0 Mon Sep 17 00:00:00 2001 From: Marcos Maronas <[email protected]> Date: Wed, 9 Sep 2026 10:35:44 -0500 Subject: [PATCH] [clang][CodeGen] Stop overriding GlobalVariable's default address space --- clang/include/clang/CodeGen/ConstantInitBuilder.h | 4 +++- clang/lib/CodeGen/ConstantInitBuilder.cpp | 2 +- .../test/CodeGenCXX/cxx0x-initializer-stdinitializerlist.cpp | 3 ++- clang/test/OpenMP/amdgcn_target_global_constructor.cpp | 4 ++-- 4 files changed, 8 insertions(+), 5 deletions(-) diff --git a/clang/include/clang/CodeGen/ConstantInitBuilder.h b/clang/include/clang/CodeGen/ConstantInitBuilder.h index 28d4764b6d60b..3575c0181ecf4 100644 --- a/clang/include/clang/CodeGen/ConstantInitBuilder.h +++ b/clang/include/clang/CodeGen/ConstantInitBuilder.h @@ -22,6 +22,7 @@ #include "clang/AST/CharUnits.h" #include "clang/CodeGen/ConstantInitFuture.h" +#include <optional> #include <vector> namespace clang { @@ -83,7 +84,8 @@ class ConstantInitBuilderBase { bool constant = false, llvm::GlobalValue::LinkageTypes linkage = llvm::GlobalValue::InternalLinkage, - unsigned addressSpace = 0); + std::optional<unsigned> addressSpace + = std::nullopt); ConstantInitFuture createFuture(llvm::Constant *initializer); diff --git a/clang/lib/CodeGen/ConstantInitBuilder.cpp b/clang/lib/CodeGen/ConstantInitBuilder.cpp index 7b3e7aea0f647..81675492a2f65 100644 --- a/clang/lib/CodeGen/ConstantInitBuilder.cpp +++ b/clang/lib/CodeGen/ConstantInitBuilder.cpp @@ -69,7 +69,7 @@ ConstantInitBuilderBase::createGlobal(llvm::Constant *initializer, CharUnits alignment, bool constant, llvm::GlobalValue::LinkageTypes linkage, - unsigned addressSpace) { + std::optional<unsigned> addressSpace) { auto GV = new llvm::GlobalVariable(CGM.getModule(), initializer->getType(), constant, diff --git a/clang/test/CodeGenCXX/cxx0x-initializer-stdinitializerlist.cpp b/clang/test/CodeGenCXX/cxx0x-initializer-stdinitializerlist.cpp index 393c53a6d2538..17e96e53514d5 100644 --- a/clang/test/CodeGenCXX/cxx0x-initializer-stdinitializerlist.cpp +++ b/clang/test/CodeGenCXX/cxx0x-initializer-stdinitializerlist.cpp @@ -90,7 +90,8 @@ std::initializer_list<int> thread_local x = {1, 2, 3, 4}; // AMDGCN: @[[REFTMP1:.*]] = private addrspace(4) constant [2 x i32] [i32 42, i32 43], align 4 // AMDGCN: @[[REFTMP2:.*]] = private addrspace(4) constant [3 x %{{.*}}] [%{{.*}} { i32 1 }, %{{.*}} { i32 2 }, %{{.*}} { i32 3 }], align 4 -// CHECK: appending global +// X86: appending global +// AMDGCN: appending addrspace(1) global // thread_local initializer: // X86-LABEL: define internal void @__cxx_global_var_init diff --git a/clang/test/OpenMP/amdgcn_target_global_constructor.cpp b/clang/test/OpenMP/amdgcn_target_global_constructor.cpp index 7f3dc4c6e63fd..ad41344fc45fb 100644 --- a/clang/test/OpenMP/amdgcn_target_global_constructor.cpp +++ b/clang/test/OpenMP/amdgcn_target_global_constructor.cpp @@ -27,8 +27,8 @@ S A; // CHECK: @__omp_rtl_assume_no_thread_state = weak_odr hidden addrspace(1) constant i32 0 // CHECK: @__omp_rtl_assume_no_nested_parallelism = weak_odr hidden addrspace(1) constant i32 0 // CHECK: @A = addrspace(1) global %struct.S zeroinitializer, align 4 -// CHECK: @llvm.global_ctors = appending global [1 x { i32, ptr, ptr }] [{ i32, ptr, ptr } { i32 65535, ptr @_GLOBAL__sub_I_amdgcn_target_global_constructor.cpp, ptr null }] -// CHECK: @llvm.global_dtors = appending global [1 x { i32, ptr, ptr }] [{ i32, ptr, ptr } { i32 65535, ptr @__dtor_A, ptr null }] +// CHECK: @llvm.global_ctors = appending addrspace(1) global [1 x { i32, ptr, ptr }] [{ i32, ptr, ptr } { i32 65535, ptr @_GLOBAL__sub_I_amdgcn_target_global_constructor.cpp, ptr null }] +// CHECK: @llvm.global_dtors = appending addrspace(1) global [1 x { i32, ptr, ptr }] [{ i32, ptr, ptr } { i32 65535, ptr @__dtor_A, ptr null }] //. // CHECK-LABEL: define {{[^@]+}}@__cxx_global_var_init // CHECK-SAME: () #[[ATTR0:[0-9]+]] { _______________________________________________ cfe-commits mailing list [email protected] https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
