CodeGenCXX: no default dllimport storage for mingw

GNU frontends don't have options like /MT, /MD
This fixes a few link error regressions with libc++ and libc++abi

Reviewers: rnk, mstorsjo, compnerd

Differential Revision: https://reviews.llvm.org/D33620

llvm-svn: 317398

diff --git a/clang/lib/CodeGen/CodeGenModule.cpp b/clang/lib/CodeGen/CodeGenModule.cpp
index b155017..61a1ed2 100644 (file)
--- a/clang/lib/CodeGen/CodeGenModule.cpp
+++ b/clang/lib/CodeGen/CodeGenModule.cpp
@@ -2284,7 +2284,8 @@ CodeGenModule::CreateRuntimeFunction(llvm::FunctionType *FTy, StringRef Name,
       F->setCallingConv(getRuntimeCC());
 
       if (!Local && getTriple().isOSBinFormatCOFF() &&
-          !getCodeGenOpts().LTOVisibilityPublicStd) {
+          !getCodeGenOpts().LTOVisibilityPublicStd &&
+          !getTriple().isWindowsGNUEnvironment()) {
         const FunctionDecl *FD = GetRuntimeFunctionDecl(Context, Name);
         if (!FD || FD->hasAttr<DLLImportAttr>()) {
           F->setDLLStorageClass(llvm::GlobalValue::DLLImportStorageClass);

diff --git a/clang/test/CodeGenCXX/runtime-dllstorage.cpp b/clang/test/CodeGenCXX/runtime-dllstorage.cpp
index 76c002c..8ccf029 100644 (file)
--- a/clang/test/CodeGenCXX/runtime-dllstorage.cpp
+++ b/clang/test/CodeGenCXX/runtime-dllstorage.cpp
@@ -12,7 +12,7 @@
 // %clang_cc1 -triple i686-windows-itanium -std=c++11 -fdeclspec -fms-compatibility -fexceptions -fcxx-exceptions -fno-use-cxa-atexit -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK-IA -check-prefix CHECK-DYNAMIC-IA -check-prefix CHECK-DYNAMIC-IA-ATEXIT
 // %clang_cc1 -triple i686-windows-itanium -std=c++11 -fdeclspec -fms-compatibility -fexceptions -fcxx-exceptions -fno-use-cxa-atexit -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK-IA -check-prefix CHECK-STATIC-IA -check-prefix CHECK-STATIC-IA-ATEXIT
 
-// RUN: %clang_cc1 -triple i686-windows-gnu -std=c++11 -fdeclspec -fms-compatibility -fexceptions -fcxx-exceptions -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK-IA -check-prefix CHECK-DYNAMIC-IA
+// RUN: %clang_cc1 -triple i686-windows-gnu -std=c++11 -fdeclspec -fms-compatibility -fexceptions -fcxx-exceptions -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK-IA -check-prefix CHECK-STATIC-IA
 // RUN: %clang_cc1 -triple i686-windows-gnu -std=c++11 -fdeclspec -fms-compatibility -fexceptions -fcxx-exceptions -flto-visibility-public-std -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK-IA -check-prefix CHECK-STATIC-IA
 // RUN: %clang_cc1 -triple i686-windows-cygnus -std=c++11 -fdeclspec -fms-compatibility -fexceptions -fcxx-exceptions -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK-IA -check-prefix CHECK-DYNAMIC-IA
 // RUN: %clang_cc1 -triple i686-windows-cygnus -std=c++11 -fdeclspec -fms-compatibility -fexceptions -fcxx-exceptions -flto-visibility-public-std -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK-IA -check-prefix CHECK-STATIC-IA