commit 99e0d7905d1576ac85bb6f969a2d969c4d2e7f82
author Chris Lattner <sabre@nondot.org> Mon Jul 16 05:43:05 2007 +0000
committer Chris Lattner <sabre@nondot.org> Mon Jul 16 05:43:05 2007 +0000
tree ae2e410c174b02e47bed22f43d26492d714de229
parent 1467e03df1dce515ed3013c7dcb6f5c541ab0d5f

Add a hack (mirroring llvm-gcc) to pointer difference 
codegen to compile:

int test(int *A, int *B) {
  return A-B;
}

into:

_test:
        movl 4(%esp), %eax
        subl 8(%esp), %eax
        sarl $2, %eax
        ret

instead of:

_test:
        movl 4(%esp), %eax
        subl 8(%esp), %eax
        movl %eax, %ecx
        sarl $31, %ecx
        shrl $30, %ecx
        addl %ecx, %eax
        sarl $2, %eax
        ret



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@39902 91177308-0d34-0410-b5e6-96231b3b80d8