New EH representation for MSVC compatibility

This introduces new instructions neccessary to implement MSVC-compatible
exception handling support.  Most of the middle-end and none of the
back-end haven't been audited or updated to take them into account.

Differential Revision: http://reviews.llvm.org/D11097

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@243766 91177308-0d34-0410-b5e6-96231b3b80d8

test/Feature/exception.ll

@@ -25,3 +25,74 @@ lpad:                                             ; preds = %entry
 declare void @_Z3quxv() optsize
 
 declare i32 @__gxx_personality_v0(...)
+
+define void @cleanupret0() personality i32 (...)* @__gxx_personality_v0 {
+entry:
+  br label %bb
+bb:
+  cleanuppad void [i7 4]
+  cleanupret i8 0 unwind label %bb
+}
+
+define void @cleanupret1() personality i32 (...)* @__gxx_personality_v0 {
+entry:
+  br label %bb
+bb:
+  cleanuppad void [i7 4]
+  cleanupret void unwind label %bb
+}
+
+define void @cleanupret2() personality i32 (...)* @__gxx_personality_v0 {
+entry:
+  cleanupret i8 0 unwind to caller
+}
+
+define void @cleanupret3() personality i32 (...)* @__gxx_personality_v0 {
+  cleanupret void unwind to caller
+}
+
+define void @catchret() personality i32 (...)* @__gxx_personality_v0 {
+entry:
+  br label %bb
+bb:
+  catchret label %bb
+}
+
+define i8 @catchpad() personality i32 (...)* @__gxx_personality_v0 {
+entry:
+  br label %bb2
+bb:
+  ret i8 %cbv
+bb2:
+  %cbv = catchpad i8 [i7 4] to label %bb unwind label %bb2
+}
+
+define void @terminatepad0() personality i32 (...)* @__gxx_personality_v0 {
+entry:
+  br label %bb
+bb:
+  terminatepad [i7 4] unwind label %bb
+}
+
+define void @terminatepad1() personality i32 (...)* @__gxx_personality_v0 {
+entry:
+  terminatepad [i7 4] unwind to caller
+}
+
+define void @cleanuppad() personality i32 (...)* @__gxx_personality_v0 {
+entry:
+  cleanuppad void [i7 4]
+  ret void
+}
+
+define void @catchendpad0() personality i32 (...)* @__gxx_personality_v0 {
+entry:
+  br label %bb
+bb:
+  catchendpad unwind label %bb
+}
+
+define void @catchendpad1() personality i32 (...)* @__gxx_personality_v0 {
+entry:
+  catchendpad unwind to caller
+}

test/Verifier/invoke.ll

@@ -2,7 +2,7 @@
 
 ; PR1042
 define i32 @foo() {
-; CHECK: The unwind destination does not have a landingpad instruction
+; CHECK: The unwind destination does not have an exception handling instruction
 	%A = invoke i32 @foo( )
 			to label %L unwind label %L		; <i32> [#uses=1]
 L:		; preds = %0, %0
@@ -18,7 +18,7 @@ L1:		; preds = %0
 L2:		; preds = %0
 	br label %L
 L:		; preds = %L2, %L1, %L1
-; CHECK: The unwind destination does not have a landingpad instruction
+; CHECK: The unwind destination does not have an exception handling instruction
 	ret i32 %A
 }