vendor/llvm/llvm-trunk-r242221

1 files changed, 35 insertions, 0 deletions

diff --git a/test/CodeGen/X86/cppeh-nounwind.ll b/test/CodeGen/X86/cppeh-nounwind.ll
new file mode 100644
index 000000000000..d9bc001a92df
--- /dev/null
+++ b/test/CodeGen/X86/cppeh-nounwind.ll
@@ -0,0 +1,35 @@
+; RUN: llc -mtriple=i686-pc-windows-msvc < %s | FileCheck %s
+
+; Sometimes invokes of nounwind functions make it through to CodeGen, especially
+; at -O0, where Clang sometimes optimistically annotates functions as nounwind.
+; WinEHPrepare ends up outlining functions, and emitting references to LSDA
+; labels. Make sure we emit the LSDA in that case.
+
+declare i32 @__CxxFrameHandler3(...)
+declare void @nounwind_func() nounwind
+declare void @cleanup()
+
+define void @should_emit_tables() personality i32 (...)* @__CxxFrameHandler3 {
+entry:
+  invoke void @nounwind_func()
+      to label %done unwind label %lpad
+
+done:
+  ret void
+
+lpad:
+  %vals = landingpad { i8*, i32 }
+      cleanup
+  call void @cleanup()
+  resume { i8*, i32 } %vals
+}
+
+; CHECK: _should_emit_tables:
+; CHECK: calll _nounwind_func
+; CHECK: retl
+
+; CHECK: L__ehtable$should_emit_tables:
+
+; CHECK: ___ehhandler$should_emit_tables:
+; CHECK: movl $L__ehtable$should_emit_tables, %eax
+; CHECK: jmp ___CxxFrameHandler3 # TAILCALL