Merging r128577

  //

  //        |--earlier--|

  //    |-----  later  ------|

  //

  // We have to be careful here as *Off is signed while *.Size is unsigned.

  if (EarlierOff >= LaterOff &&

      EarlierOff + Earlier.Size <= LaterOff + Later.Size)

      uint64_t(EarlierOff - LaterOff) + Earlier.Size <= Later.Size)

    return true;

  // Otherwise, they don't completely overlap.

; RUN: opt < %s -basicaa -dse -S | FileCheck %s

; PR9561

target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128-n8:16:32"

target triple = "i386-apple-darwin9.8"

@A = external global [0 x i32]

declare cc10 void @Func2(i32*, i32*, i32*, i32)

define cc10 void @Func1(i32* noalias %Arg1, i32* noalias %Arg2, i32* %Arg3, i32 %Arg4) {

entry:

  store i32 add (i32 ptrtoint ([0 x i32]* @A to i32), i32 1), i32* %Arg2

; CHECK: store i32 add (i32 ptrtoint ([0 x i32]* @A to i32), i32 1), i32* %Arg2

  %ln2gz = getelementptr i32* %Arg1, i32 14

  %ln2gA = bitcast i32* %ln2gz to double*

  %ln2gB = load double* %ln2gA

  %ln2gD = getelementptr i32* %Arg2, i32 -3

  %ln2gE = bitcast i32* %ln2gD to double*

  store double %ln2gB, double* %ln2gE

; CHECK: store double %ln2gB, double* %ln2gE

  tail call cc10 void @Func2(i32* %Arg1, i32* %Arg2, i32* %Arg3, i32 %Arg4) nounwind

  ret void

}