Prep for merging 3.4: Undo changes from 3.3 branch

test/Transforms/LoopVectorize/value-ptr-bug.ll

-; RUN: opt -S -loop-vectorize -force-vector-width=4 -force-vector-unroll=1 -dce -instcombine < %s | FileCheck %s
-
-target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
-
-; PR16073
-
-; Because we were caching value pointers accross a function call that could RAUW
-; we would generate an undefined value store below:
-; SCEVExpander::expandCodeFor would change a value (the start value of an
-; induction) that we cached in the induction variable list.
-
-; CHECK: test_vh
-; CHECK-NOT: store <4 x i8> undef
-
-define void @test_vh(i32* %ptr265, i32* %ptr266, i32 %sub267) {
-entry:
-  br label %loop
-
-loop:
-  %inc = phi i32 [ %sub267, %entry ], [ %add, %loop]
-  %ext.inc = sext i32 %inc to i64
-  %add.ptr265 = getelementptr inbounds i32* %ptr265, i64 %ext.inc
-  %add.ptr266 = getelementptr inbounds i32* %ptr266, i64 %ext.inc
-  %add = add i32 %inc, 9
-  %cmp = icmp slt i32 %add, 140
-  br i1 %cmp, label %block1, label %loop
-
-block1:
-  %sub267.lcssa = phi i32 [ %add, %loop ]
-  %add.ptr266.lcssa = phi i32* [ %add.ptr266, %loop ]
-  %add.ptr265.lcssa = phi i32* [ %add.ptr265, %loop ]
-  %tmp29 = bitcast i32* %add.ptr265.lcssa to i8*
-  %tmp30 = bitcast i32* %add.ptr266.lcssa to i8*
-  br label %do.body272
-
-do.body272:
-  %row_width.5 = phi i32 [ %sub267.lcssa, %block1 ], [ %dec, %do.body272 ]
-  %sp.4 = phi i8* [ %tmp30, %block1 ], [ %incdec.ptr273, %do.body272 ]
-  %dp.addr.4 = phi i8* [ %tmp29, %block1 ], [ %incdec.ptr274, %do.body272 ]
-  %incdec.ptr273 = getelementptr inbounds i8* %sp.4, i64 1
-  %tmp31 = load i8* %sp.4, align 1
-  %incdec.ptr274 = getelementptr inbounds i8* %dp.addr.4, i64 1
-  store i8 %tmp31, i8* %dp.addr.4, align 1
-  %dec = add i32 %row_width.5, -1
-  %cmp276 = icmp eq i32 %dec, 0
-  br i1 %cmp276, label %loop.exit, label %do.body272
-
-loop.exit:
-  ret void
-}