Move the personality function from LandingPadInst to Function

The personality routine currently lives in the LandingPadInst.

This isn't desirable because:
- All LandingPadInsts in the same function must have the same
  personality routine.  This means that each LandingPadInst beyond the
  first has an operand which produces no additional information.

- There is ongoing work to introduce EH IR constructs other than
  LandingPadInst.  Moving the personality routine off of any one
  particular Instruction and onto the parent function seems a lot better
  than have N different places a personality function can sneak onto an
  exceptional function.

Differential Revision: http://reviews.llvm.org/D10429

llvm-svn: 239940
diff --git a/llvm/test/Transforms/SimplifyCFG/invoke_unwind.ll b/llvm/test/Transforms/SimplifyCFG/invoke_unwind.ll
index 435bed0..3b4c09d 100644
--- a/llvm/test/Transforms/SimplifyCFG/invoke_unwind.ll
+++ b/llvm/test/Transforms/SimplifyCFG/invoke_unwind.ll
@@ -4,7 +4,7 @@
 
 ; This testcase checks to see if the simplifycfg pass is converting invoke
 ; instructions to call instructions if the handler just rethrows the exception.
-define i32 @test1() {
+define i32 @test1() personality i32 (...)* @__gxx_personality_v0 {
 ; CHECK-LABEL: @test1(
 ; CHECK-NEXT: call void @bar()
 ; CHECK-NEXT: ret i32 0
@@ -12,7 +12,7 @@
                         to label %1 unwind label %Rethrow
         ret i32 0
 Rethrow:
-        %exn = landingpad {i8*, i32} personality i32 (...)* @__gxx_personality_v0
+        %exn = landingpad {i8*, i32}
                  catch i8* null
         resume { i8*, i32 } %exn
 }