AMDGPU: Remove unnecessary and on conditional branch

The comment explaining why this was necessary is incorrect
in its description of v_cmp's behavior for inactive workitems.

llvm-svn: 286134
diff --git a/llvm/test/CodeGen/AMDGPU/i1-copy-implicit-def.ll b/llvm/test/CodeGen/AMDGPU/i1-copy-implicit-def.ll
index d6309a2..5a21300 100644
--- a/llvm/test/CodeGen/AMDGPU/i1-copy-implicit-def.ll
+++ b/llvm/test/CodeGen/AMDGPU/i1-copy-implicit-def.ll
@@ -1,10 +1,9 @@
-; RUN: llc -march=amdgcn -mcpu=SI -verify-machineinstrs < %s | FileCheck -check-prefix=SI %s
+; RUN: llc -march=amdgcn -verify-machineinstrs < %s | FileCheck -check-prefix=SI %s
 ; RUN: llc -march=amdgcn -mcpu=tonga -verify-machineinstrs < %s | FileCheck -check-prefix=SI %s
 
 ; SILowerI1Copies was not handling IMPLICIT_DEF
 ; SI-LABEL: {{^}}br_implicit_def:
 ; SI: BB#0:
-; SI-NEXT: s_and_b64 vcc, exec
 ; SI-NEXT: s_cbranch_vccnz
 define void @br_implicit_def(i32 addrspace(1)* %out, i32 %arg) #0 {
 bb: