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[Clang] Disable RTTI for offloading at the frontend level #127082

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[Clang] Disable RTTI for offloading at the frontend level #127082

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b17f355
[Clang] Disable RTTI for offloading at the frontend level
jhuber6 Feb 13, 2025
6572946
Merge branch 'main' into RTTI
jhuber6 Apr 25, 2025
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3 changes: 1 addition & 2 deletions clang/lib/CodeGen/CodeGenModule.h
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Original file line number Diff line number Diff line change
Expand Up @@ -1073,8 +1073,7 @@ class CodeGenModule : public CodeGenTypeCache {

// Return whether RTTI information should be emitted for this target.
bool shouldEmitRTTI(bool ForEH = false) {
return (ForEH || getLangOpts().RTTI) &&
(!getLangOpts().isTargetDevice() || !getTriple().isGPU());
return (ForEH || getLangOpts().RTTI);
}

/// Get the address of the RTTI descriptor for the given type.
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7 changes: 7 additions & 0 deletions clang/lib/Driver/ToolChains/Clang.cpp
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Expand Up @@ -7119,6 +7119,13 @@ void Clang::ConstructJob(Compilation &C, const JobAction &JA,
}
}

// The offloading devices do not support RTTI.
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@asudarsa asudarsa Mar 31, 2025

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I see that IsHIPDevice has been added to the check here (compared to what was deleted inside CodeGenModule.h). is that expected?

Thanks

if (IsCudaDevice || IsHIPDevice ||
(IsOpenMPDevice &&
(Triple.isNVPTX() || Triple.isAMDGCN() || Triple.isSPIRV()))) {
CmdArgs.push_back("-fno-rtti");
}

// Forward --no-offloadlib to -cc1.
if (!Args.hasFlag(options::OPT_offloadlib, options::OPT_no_offloadlib, true))
CmdArgs.push_back("--no-offloadlib");
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2 changes: 1 addition & 1 deletion clang/test/CodeGenCUDA/device-vtable.cu
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Expand Up @@ -8,7 +8,7 @@

// RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -emit-llvm -o - %s \
// RUN: | FileCheck %s -check-prefix=CHECK-HOST -check-prefix=CHECK-BOTH
// RUN: %clang_cc1 -triple nvptx64-nvidia-cuda -fcuda-is-device -emit-llvm -o - %s \
// RUN: %clang_cc1 -triple nvptx64-nvidia-cuda -fcuda-is-device -fno-rtti -emit-llvm -o - %s \
// RUN: | FileCheck %s -check-prefix=CHECK-DEVICE -check-prefix=CHECK-BOTH

#include "Inputs/cuda.h"
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2 changes: 1 addition & 1 deletion clang/test/CodeGenCUDA/record-layout.cu
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Expand Up @@ -3,7 +3,7 @@
// RUN: cat %t | FileCheck --check-prefixes=CHECK,HOST %s
// RUN: %clang_cc1 -fcuda-is-device -triple amdgcn-amd-amdhsa -target-cpu gfx1100 \
// RUN: -emit-llvm -fdump-record-layouts -aux-triple x86_64-pc-windows-msvc \
// RUN: -o %t -xhip %s | FileCheck %s --check-prefix=AST
// RUN: -fno-rtti -o %t -xhip %s | FileCheck %s --check-prefix=AST
// RUN: cat %t | FileCheck --check-prefixes=CHECK,DEV %s

#include "Inputs/cuda.h"
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2 changes: 1 addition & 1 deletion clang/test/Driver/openmp-offload-gpu.c
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Expand Up @@ -226,7 +226,7 @@

// verify the tools invocations
// CHECK: "-cc1" "-triple" "x86_64-unknown-linux-gnu"{{.*}}"-emit-llvm-bc"{{.*}}"-x" "c"
// CHECK: "-cc1" "-triple" "nvptx64-nvidia-cuda" "-aux-triple" "x86_64-unknown-linux-gnu"{{.*}}"-target-cpu" "sm_52"
// CHECK: "-cc1" "-triple" "nvptx64-nvidia-cuda" "-aux-triple" "x86_64-unknown-linux-gnu"{{.*}}"-target-cpu" "sm_52"{{.*}}"-fno-rtti"
// CHECK: "-cc1" "-triple" "x86_64-unknown-linux-gnu"{{.*}}"-emit-obj"
// CHECK: clang-linker-wrapper{{.*}} "-o" "a.out"

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14 changes: 7 additions & 7 deletions clang/test/Headers/hip-header.hip
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Expand Up @@ -3,47 +3,47 @@
// RUN: -internal-isystem %S/../../lib/Headers/cuda_wrappers \
// RUN: -internal-isystem %S/Inputs/include \
// RUN: -triple amdgcn-amd-amdhsa -aux-triple x86_64-unknown-unknown \
// RUN: -target-cpu gfx906 -emit-llvm %s -fcuda-is-device -o - \
// RUN: -target-cpu gfx906 -emit-llvm %s -fno-rtti -fcuda-is-device -o - \
// RUN: -D__HIPCC_RTC__ | FileCheck -check-prefixes=CHECK,NOMALLOC %s
// RUN: %clang_cc1 -include __clang_hip_runtime_wrapper.h \
// RUN: -internal-isystem %S/../../lib/Headers/cuda_wrappers \
// RUN: -internal-isystem %S/Inputs/include \
// RUN: -include cmath \
// RUN: -triple amdgcn-amd-amdhsa -aux-triple x86_64-unknown-unknown \
// RUN: -target-cpu gfx906 -emit-llvm %s -fcuda-is-device -o - \
// RUN: -target-cpu gfx906 -emit-llvm %s -fno-rtti -fcuda-is-device -o - \
// RUN: -D__HIPCC_RTC__ | FileCheck %s -check-prefixes=AMD_BOOL_RETURN
// RUN: %clang_cc1 -include __clang_hip_runtime_wrapper.h \
// RUN: -internal-isystem %S/../../lib/Headers/cuda_wrappers \
// RUN: -internal-isystem %S/Inputs/include \
// RUN: -include cmath \
// RUN: -triple amdgcn-amd-amdhsa -aux-triple x86_64-unknown-unknown \
// RUN: -target-cpu gfx906 -emit-llvm %s -fcuda-is-device -o - \
// RUN: -target-cpu gfx906 -emit-llvm %s -fno-rtti -fcuda-is-device -o - \
// RUN: -D__HIPCC_RTC__ -DUSE_ISNAN_WITH_INT_RETURN | FileCheck %s -check-prefixes=AMD_INT_RETURN
// RUN: %clang_cc1 -include __clang_hip_runtime_wrapper.h \
// RUN: -internal-isystem %S/../../lib/Headers/cuda_wrappers \
// RUN: -internal-isystem %S/Inputs/include \
// RUN: -triple amdgcn-amd-amdhsa -aux-triple x86_64-unknown-unknown \
// RUN: -target-cpu gfx906 -emit-llvm %s -fcuda-is-device -o - \
// RUN: -target-cpu gfx906 -emit-llvm %s -fno-rtti -fcuda-is-device -o - \
// RUN: -D__HIPCC_RTC__ -std=c++14 | FileCheck -check-prefixes=CHECK,CXX14 %s
// RUN: %clang_cc1 -include __clang_hip_runtime_wrapper.h \
// RUN: -internal-isystem %S/../../lib/Headers/cuda_wrappers \
// RUN: -internal-isystem %S/Inputs/include \
// RUN: -triple amdgcn-amd-amdhsa -aux-triple x86_64-unknown-unknown \
// RUN: -target-cpu gfx906 -emit-llvm %s -fcuda-is-device -o - \
// RUN: -target-cpu gfx906 -emit-llvm %s -fno-rtti -fcuda-is-device -o - \
// RUN: -DHIP_VERSION_MAJOR=4 -DHIP_VERSION_MINOR=5 \
// RUN: -D__HIPCC_RTC__ -disable-llvm-passes | FileCheck -check-prefixes=MALLOC %s
// RUN: %clang_cc1 -include __clang_hip_runtime_wrapper.h \
// RUN: -internal-isystem %S/../../lib/Headers/cuda_wrappers \
// RUN: -internal-isystem %S/Inputs/include \
// RUN: -triple amdgcn-amd-amdhsa -aux-triple x86_64-unknown-unknown \
// RUN: -target-cpu gfx906 -emit-llvm %s -fcuda-is-device -o - \
// RUN: -target-cpu gfx906 -emit-llvm %s -fno-rtti -fcuda-is-device -o - \
// RUN: -DHIP_VERSION_MAJOR=4 -DHIP_VERSION_MINOR=5 \
// RUN: -disable-llvm-passes | FileCheck -check-prefixes=MALLOC %s
// RUN: %clang_cc1 -include __clang_hip_runtime_wrapper.h \
// RUN: -internal-isystem %S/../../lib/Headers/cuda_wrappers \
// RUN: -internal-isystem %S/Inputs/include \
// RUN: -triple amdgcn-amd-amdhsa -aux-triple x86_64-unknown-unknown \
// RUN: -target-cpu gfx906 -emit-llvm %s -fcuda-is-device -o - \
// RUN: -target-cpu gfx906 -emit-llvm %s -fno-rtti -fcuda-is-device -o - \
// RUN: -DHIP_VERSION_MAJOR=4 -DHIP_VERSION_MINOR=5 \
// RUN: -fsanitize=address -disable-llvm-passes -D__HIPCC_RTC__ \
// RUN: | FileCheck -check-prefixes=MALLOC-ASAN %s
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6 changes: 3 additions & 3 deletions clang/test/OpenMP/nvptx_target_pure_deleted_codegen.cpp
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@@ -1,9 +1,9 @@
// Test target codegen - host bc file has to be created first.
// RUN: %clang_cc1 -verify -fopenmp -x c++ -triple powerpc64le-unknown-unknown -fopenmp-targets=nvptx64-nvidia-cuda -emit-llvm-bc %s -o %t-ppc-host.bc
// RUN: %clang_cc1 -verify -fopenmp -x c++ -triple nvptx64-unknown-unknown -fopenmp-targets=nvptx64-nvidia-cuda -emit-llvm %s -fopenmp-is-target-device -fvisibility=protected -fopenmp-host-ir-file-path %t-ppc-host.bc -o - | FileCheck %s
// RUN: %clang_cc1 -verify -fopenmp -x c++ -triple nvptx64-unknown-unknown -fopenmp-targets=nvptx64-nvidia-cuda -emit-llvm %s -fno-rtti -fopenmp-is-target-device -fvisibility=protected -fopenmp-host-ir-file-path %t-ppc-host.bc -o - | FileCheck %s
// RUN: %clang_cc1 -verify -fopenmp -x c++ -triple i386-unknown-unknown -fopenmp-targets=nvptx-nvidia-cuda -emit-llvm-bc %s -o %t-x86-host.bc
// RUN: %clang_cc1 -verify -fopenmp -x c++ -triple nvptx-unknown-unknown -fopenmp-targets=nvptx-nvidia-cuda -emit-llvm %s -fopenmp-is-target-device -fvisibility=protected -fopenmp-host-ir-file-path %t-x86-host.bc -o - -fno-rtti | FileCheck %s
// RUN: %clang_cc1 -verify -fopenmp -fexceptions -fcxx-exceptions -x c++ -triple nvptx-unknown-unknown -fopenmp-targets=nvptx-nvidia-cuda -emit-llvm %s -fopenmp-is-target-device -fvisibility=protected -fopenmp-host-ir-file-path %t-x86-host.bc -o - -fno-rtti | FileCheck %s
// RUN: %clang_cc1 -verify -fopenmp -x c++ -triple nvptx-unknown-unknown -fopenmp-targets=nvptx-nvidia-cuda -emit-llvm %s -fno-rtti -fopenmp-is-target-device -fvisibility=protected -fopenmp-host-ir-file-path %t-x86-host.bc -o - -fno-rtti | FileCheck %s
// RUN: %clang_cc1 -verify -fopenmp -fexceptions -fcxx-exceptions -x c++ -triple nvptx-unknown-unknown -fopenmp-targets=nvptx-nvidia-cuda -emit-llvm %s -fno-rtti -fopenmp-is-target-device -fvisibility=protected -fopenmp-host-ir-file-path %t-x86-host.bc -o - -fno-rtti | FileCheck %s
// expected-no-diagnostics

#ifndef HEADER
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