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

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@239940 91177308-0d34-0410-b5e6-96231b3b80d8

test/CodeGen/WinEH/cppeh-catch-scalar.ll

@@ -29,7 +29,7 @@ target triple = "x86_64-pc-windows-msvc"
 ; CHECK:           to label %invoke.cont unwind label %[[LPAD_LABEL:lpad[0-9]*]]
 
 ; Function Attrs: uwtable
-define void @_Z4testv() #0 {
+define void @_Z4testv() #0 personality i8* bitcast (i32 (...)* @__CxxFrameHandler3 to i8*) {
 entry:
   %exn.slot = alloca i8*
   %ehselector.slot = alloca i32
@@ -41,13 +41,13 @@ invoke.cont:                                      ; preds = %entry
   br label %try.cont
 
 ; CHECK: [[LPAD_LABEL]]:{{[ ]+}}; preds = %entry
-; CHECK:   landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__CxxFrameHandler3 to i8*)
+; CHECK:   landingpad { i8*, i32 }
 ; CHECK-NEXT:           catch i8* bitcast (i8** @_ZTIi to i8*)
 ; CHECK-NEXT:   [[RECOVER:\%.+]] = call i8* (...) @llvm.eh.actions(i32 1, i8* bitcast (i8** @_ZTIi to i8*), i32 0, i8* (i8*, i8*)* @_Z4testv.catch)
 ; CHECK-NEXT:   indirectbr i8* [[RECOVER]], [label %try.cont]
 
 lpad:                                             ; preds = %entry
-  %tmp = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__CxxFrameHandler3 to i8*)
+  %tmp = landingpad { i8*, i32 }
           catch i8* bitcast (i8** @_ZTIi to i8*)
   %tmp1 = extractvalue { i8*, i32 } %tmp, 0
   store i8* %tmp1, i8** %exn.slot