Revert r312154 "Re-enable "[MachineCopyPropagation] Extend pass to do COPY source forwarding""

It caused PR34387: Assertion failed: (RegNo < NumRegs && "Attempting to access record for invalid register number!")

> Issues identified by buildbots addressed since original review:
> - Fixed ARMLoadStoreOptimizer bug exposed by this change in r311907.
> - The pass no longer forwards COPYs to physical register uses, since
>   doing so can break code that implicitly relies on the physical
>   register number of the use.
> - The pass no longer forwards COPYs to undef uses, since doing so
>   can break the machine verifier by creating LiveRanges that don't
>   end on a use (since the undef operand is not considered a use).
>
>   [MachineCopyPropagation] Extend pass to do COPY source forwarding
>
>   This change extends MachineCopyPropagation to do COPY source forwarding.
>
>   This change also extends the MachineCopyPropagation pass to be able to
>   be run during register allocation, after physical registers have been
>   assigned, but before the virtual registers have been re-written, which
>   allows it to remove virtual register COPY LiveIntervals that become dead
>   through the forwarding of all of their uses.

llvm-svn: 312178

1 files changed, 1 insertions, 1 deletions

diff --git a/llvm/test/CodeGen/X86/buildvec-insertvec.ll b/llvm/test/CodeGen/X86/buildvec-insertvec.ll
index 076df3a9003..cd5abc1373b 100644
--- a/llvm/test/CodeGen/X86/buildvec-insertvec.ll
+++ b/llvm/test/CodeGen/X86/buildvec-insertvec.ll
@@ -38,7 +38,7 @@ define <4 x float> @test_negative_zero_1(<4 x float> %A) {
 ; SSE2-LABEL: test_negative_zero_1:
 ; SSE2:       # BB#0: # %entry
 ; SSE2-NEXT:    movaps %xmm0, %xmm1
-; SSE2-NEXT:    movhlps {{.*#+}} xmm1 = xmm0[1],xmm1[1]
+; SSE2-NEXT:    movhlps {{.*#+}} xmm1 = xmm1[1,1]
 ; SSE2-NEXT:    movss {{.*#+}} xmm2 = mem[0],zero,zero,zero
 ; SSE2-NEXT:    unpcklps {{.*#+}} xmm0 = xmm0[0],xmm2[0],xmm0[1],xmm2[1]
 ; SSE2-NEXT:    xorps %xmm2, %xmm2