R600/SI: Enable a lot of existing tests for VI (squashed commits)

This is a union of these commits:

* R600/SI: Enable more tests for VI which need no changes

* R600/SI: Enable V_BCNT tests for VI
    Differences:
    - v_bcnt_..._e32 -> _e64
    - s_load_dword* inline offset is in bytes instead of dwords

* R600/SI: Enable all tests for VI which use S_LOAD_DWORD
    The inline offset is changed from dwords to bytes.

* R600/SI: Enable LDS tests for VI
    Differences:
    - the s_load_dword inline offset changed from dwords to bytes
    - the tests checked very little on CI, so they have been fixed to check all
      instructions that "SI" checked

* R600/SI: Enable lshr tests for VI

* R600/SI: Fix divrem64 tests
    - "v_lshl_64" was missing "b" before "64"
    - added VI-NOT checks

* R600/SI: Enable the SI.tid test for VI

* R600/SI: Enable the frem test for VI
    Also, the frem_f64 checking is added for CI-VI.

* R600/SI: Add VI tests for rsq.clamped

llvm-svn: 228830
diff --git a/llvm/test/CodeGen/R600/scratch-buffer.ll b/llvm/test/CodeGen/R600/scratch-buffer.ll
index 740328a..8c5a990 100644
--- a/llvm/test/CodeGen/R600/scratch-buffer.ll
+++ b/llvm/test/CodeGen/R600/scratch-buffer.ll
@@ -1,4 +1,5 @@
 ; RUN: llc -verify-machineinstrs -march=amdgcn -mcpu=SI < %s | FileCheck %s
+; RUN: llc -verify-machineinstrs -march=amdgcn -mcpu=tonga < %s | FileCheck %s
 
 ; When a frame index offset is more than 12-bits, make sure we don't store
 ; it in mubuf's offset field.