On Darwin ARM, set the UNWIND_RESUME libcall to _Unwind_SjLj_Resume.

This is important for the correct lowering of unwind instructions
(which doesn't matter at all) and llvm.eh.resume calls (which does).

Take 2, now with more basic competence.

llvm-svn: 132295

2 files changed, 30 insertions, 0 deletions

diff --git a/llvm/lib/Target/ARM/ARMISelLowering.cpp b/llvm/lib/Target/ARM/ARMISelLowering.cpp
index a78c3ed2a4a..1e90d422bd3 100644
--- a/llvm/lib/Target/ARM/ARMISelLowering.cpp
+++ b/llvm/lib/Target/ARM/ARMISelLowering.cpp
@@ -656,6 +656,7 @@ ARMTargetLowering::ARMTargetLowering(TargetMachine &TM)
     setOperationAction(ISD::EH_SJLJ_SETJMP, MVT::i32, Custom);
     setOperationAction(ISD::EH_SJLJ_LONGJMP, MVT::Other, Custom);
     setOperationAction(ISD::EH_SJLJ_DISPATCHSETUP, MVT::Other, Custom);
+    setLibcallName(RTLIB::UNWIND_RESUME, "_Unwind_SjLj_Resume");
   }
 
   setOperationAction(ISD::SETCC,     MVT::i32, Expand);
diff --git a/llvm/test/CodeGen/ARM/eh-resume-darwin.ll b/llvm/test/CodeGen/ARM/eh-resume-darwin.ll
new file mode 100644
index 00000000000..e4755085de7
--- /dev/null
+++ b/llvm/test/CodeGen/ARM/eh-resume-darwin.ll
@@ -0,0 +1,29 @@
+; RUN: llc < %s -march=arm | FileCheck %s
+target triple = "armv6-apple-macosx10.6"
+
+declare void @func()
+
+declare i8* @llvm.eh.exception() nounwind readonly
+
+declare i32 @llvm.eh.selector(i8*, i8*, ...) nounwind
+
+declare void @llvm.eh.resume(i8*, i32)
+
+declare i32 @__gxx_personality_sj0(...)
+
+define void @test0() {
+entry:
+  invoke void @func()
+    to label %cont unwind label %lpad
+
+cont:
+  ret void
+
+lpad:
+  %exn = call i8* @llvm.eh.exception()
+  %sel = call i32 (i8*, i8*, ...)* @llvm.eh.selector(i8* %exn, i8* bitcast (i32 (...)* @__gxx_personality_sj0 to i8*), i32 0)
+  call void @llvm.eh.resume(i8* %exn, i32 %sel) noreturn
+  unreachable
+}
+
+; CHECK: __Unwind_SjLj_Resume