[COFF] Statically link certain runtime library functions

Statically link certain runtime library functions for MSVC/GNU Windows
environments. This is consistent with MSVC behavior.

Fixes LNK4286 and LNK4217 warnings from link.exe when linking the static
CRT:
  LINK : warning LNK4286: symbol '__std_terminate' defined in 'libvcruntime.lib(ehhelpers.obj)' is imported by 'ASAN_NOINST_TEST_OBJECTS.asan_noinst_test.cc.x86_64-calls.o'
  LINK : warning LNK4286: symbol '__std_terminate' defined in 'libvcruntime.lib(ehhelpers.obj)' is imported by 'ASAN_NOINST_TEST_OBJECTS.asan_test_main.cc.x86_64-calls.o'
  LINK : warning LNK4217: symbol '_CxxThrowException' defined in 'libvcruntime.lib(throw.obj)' is imported by 'ASAN_NOINST_TEST_OBJECTS.gtest-all.cc.x86_64-calls.o' in function '"int `public: static class UnitTest::GetInstance * __cdecl testing::UnitTest::GetInstance(void)'::`1'::dtor$5" (?dtor$5@?0??GetInstance@UnitTest@testing@@SAPEAV12@XZ@4HA)'

Reviewers: mstorsjo, efriedma, TomTan, compnerd, smeenai, mgrang

Subscribers: abdulras, theraven, smeenai, pcc, mehdi_amini, javed.absar, inglorion, kristof.beyls, dexonsmith, cfe-commits

Differential Revision: https://reviews.llvm.org/D55229

llvm-svn: 359250

1 files changed, 20 insertions, 0 deletions

diff --git a/clang/test/CodeGen/ms-symbol-linkage.cpp b/clang/test/CodeGen/ms-symbol-linkage.cpp
new file mode 100644
index 00000000000..3674ad0debf
--- /dev/null
+++ b/clang/test/CodeGen/ms-symbol-linkage.cpp
@@ -0,0 +1,20 @@
+// RUN: %clangxx -target aarch64-windows \
+// RUN: -fcxx-exceptions -c -o - %s \
+// RUN: | llvm-objdump -syms - 2>&1 | FileCheck %s
+
+void foo1() { throw 1; }
+// CHECK-LABEL: foo1
+// CHECK-NOT: __imp__CxxThrowException
+
+void bar();
+void foo2() noexcept(true) { bar(); }
+// CHECK-LABEL: foo2
+// CHECK-NOT: __imp___std_terminate
+
+struct A {};
+struct B { virtual void f(); };
+struct C : A, virtual B {};
+struct T {};
+T *foo3() { return dynamic_cast<T *>((C *)0); }
+// CHECK-LABEL: foo3
+// CHECK-NOT: __imp___RTDynamicCast