[AArch64] Use dwarf exception handling on MinGW

Ideally we should probably produce WinEH here as well, but until
then, we can use dwarf exceptions, without any further changes
required in clang, libunwind or libcxxabi.

Differential Revision: https://reviews.llvm.org/D39535

llvm-svn: 317304

1 files changed, 36 insertions, 0 deletions

diff --git a/llvm/test/CodeGen/AArch64/dwarf-cfi.ll b/llvm/test/CodeGen/AArch64/dwarf-cfi.ll
new file mode 100644
index 00000000000..a75bcd19c69
--- /dev/null
+++ b/llvm/test/CodeGen/AArch64/dwarf-cfi.ll
@@ -0,0 +1,36 @@
+; RUN: llc -mtriple aarch64-windows-gnu -filetype=asm -o - %s | FileCheck %s
+
+define void @_Z1gv() personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) {
+entry:
+  invoke void @_Z1fv()
+          to label %try.cont unwind label %lpad
+
+lpad:
+  %0 = landingpad { i8*, i32 }
+          catch i8* null
+  %1 = extractvalue { i8*, i32 } %0, 0
+  %2 = tail call i8* @__cxa_begin_catch(i8* %1) #2
+  tail call void @__cxa_end_catch()
+  br label %try.cont
+
+try.cont:
+  ret void
+}
+
+declare void @_Z1fv()
+
+declare i32 @__gxx_personality_v0(...)
+
+declare i8* @__cxa_begin_catch(i8*)
+
+declare void @__cxa_end_catch()
+
+; CHECK-LABEL: _Z1gv:
+; CHECK:    .cfi_startproc
+; CHECK:    .cfi_personality 0, __gxx_personality_v0
+; CHECK:    .cfi_lsda 0, .Lexception0
+; CHECK:    str x30, [sp, #-16]!
+; CHECK:    .cfi_def_cfa_offset 16
+; CHECK:    .cfi_offset w30, -16
+; CHECK:    ldr x30, [sp], #16
+; CHECK:    .cfi_endproc