[LLVMbugs] [Bug 9120] not taking advantage of known pointer alignment

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=9120

Chris Lattner <clattner at apple.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED

--- Comment #6 from Chris Lattner <clattner at apple.com> 2011-02-13 02:25:42 CST ---
Comment #2 is now simplified into:

define i1 @test(i32 %x, i32 %y) {
  %C = icmp eq i32 %x, %y
  ret i1 %C
}

We now compile the original testcase down to this:


define void @_Z3fooRKSt6vectorIiSaIiEE(%"class.std::vector"* nocapture %v) ssp
{
entry:
  %tmp2.i = getelementptr inbounds %"class.std::vector"* %v, i64 0, i32 0, i64
8
  %0 = bitcast i8* %tmp2.i to i32**
  %tmp3.i = load i32** %0, align 8, !tbaa !0
  %tmp5.i = bitcast %"class.std::vector"* %v to i32**
  %tmp6.i = load i32** %tmp5.i, align 8, !tbaa !0
  %cmp = icmp eq i32* %tmp3.i, %tmp6.i
  br i1 %cmp, label %if.then, label %if.else

so this looks fixed!

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