[MS] Always use base dtors in place of complete/vbase dtors when possible

Summary:
Previously we tried too hard to uphold the fiction that destructor
variants work like they do on Itanium throughout the ABI-neutral parts
of clang. This lead to MS C++ ABI incompatiblities and other bugs. Now,
-mconstructor-aliases will no longer control this ABI detail, and clang
-cc1's LLVM IR output will be this much closer to the clang driver's.

Based on a patch by Zahira Ammarguellat:
  https://reviews.llvm.org/D39063

I've tried to move the logic that Zahira added into MicrosoftCXXABI.cpp.
There is only one ABI-specific detail sticking out, and that is in
CodeGenModule::getAddrOfCXXStructor, where we collapse complete dtors to
base dtors in the MS ABI.

This fixes PR32990.

Reviewers: erichkeane, zahiraam, majnemer, rjmccall

Subscribers: cfe-commits

Differential Revision: https://reviews.llvm.org/D44505

llvm-svn: 327732

1 files changed, 1 insertions, 1 deletions

diff --git a/clang/test/CodeGenCoroutines/coro-unhandled-exception.cpp b/clang/test/CodeGenCoroutines/coro-unhandled-exception.cpp
index e26a51861d9..e0fef07545a 100644
--- a/clang/test/CodeGenCoroutines/coro-unhandled-exception.cpp
+++ b/clang/test/CodeGenCoroutines/coro-unhandled-exception.cpp
@@ -37,7 +37,7 @@ coro_t f() {
 // CHECK:       to label %{{.+}} unwind label %[[EHCLEANUP:.+]]
 // CHECK: [[EHCLEANUP]]:
 // CHECK:   %[[INNERPAD:.+]] = cleanuppad within none []
-// CHECK:   call void @"\01??_DCleanup@@QEAAXXZ"(
+// CHECK:   call void @"\01??1Cleanup@@QEAA@XZ"(
 // CHECK:   cleanupret from %[[INNERPAD]] unwind label %[[CATCHSW:.+]]
 // CHECK: [[CATCHSW]]:
 // CHECK:   %[[CATCHSWTOK:.+]] = catchswitch within none [label %[[CATCH:.+]]] unwind label