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, 2 insertions, 1 deletions

diff --git a/llvm/test/CodeGen/AArch64/merge-store-dependency.ll b/llvm/test/CodeGen/AArch64/merge-store-dependency.ll
index c33248f56f4..4f2af9ed7e6 100644
--- a/llvm/test/CodeGen/AArch64/merge-store-dependency.ll
+++ b/llvm/test/CodeGen/AArch64/merge-store-dependency.ll
@@ -8,9 +8,10 @@
 define void @test(%struct1* %fde, i32 %fd, void (i32, i32, i8*)* %func, i8* %arg)  {
 ;CHECK-LABEL: test
 entry:
+; A53: mov [[DATA:w[0-9]+]], w1
 ; A53: str q{{[0-9]+}}, {{.*}}
 ; A53: str q{{[0-9]+}}, {{.*}}
-; A53: str w1, {{.*}}
+; A53: str [[DATA]], {{.*}}
 
   %0 = bitcast %struct1* %fde to i8*
   tail call void @llvm.memset.p0i8.i64(i8* %0, i8 0, i64 40, i32 8, i1 false)