[llvm] [AMDGPU] Add MachineVerifier check to detect illegal copies from vector register to SGPR (PR #105494)

[Aditi Medhane via llvm-commits]

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@@ -32,38 +32,6 @@ body:             |
     S_BRANCH %bb.2
 ...
 
----
-# GCN-LABEL: name: phi_moveimm_subreg_input
-# GCN: %{{[0-9]+}}:sreg_64 = PHI %{{[0-9]+}}, %bb.3, %{{[0-9]+}}, %bb.1
-name:            phi_moveimm_subreg_input
-tracksRegLiveness: true
-body:             |
-  bb.0:
-    successors: %bb.1
-    liveins: $sgpr0, $sgpr1
-
-    %0:vgpr_32 = V_MOV_B32_e32 0, implicit $exec
-
-    %4:sreg_32 = COPY $sgpr0
-    %5:sreg_32 = COPY $sgpr1
-
-  bb.1:
-    successors: %bb.2
-    undef %2.sub0:sreg_64 = S_ADD_U32 %4, %5, implicit-def $scc
-    S_BRANCH %bb.2
-
-  bb.2:
-    successors: %bb.3
-    %3:sreg_64 = PHI %1, %bb.3, %2, %bb.1
-    S_BRANCH %bb.3
-
-  bb.3:
-    successors: %bb.2
-    undef %1.sub0:sreg_64 = COPY %0
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AditiRM wrote:

Updated the testcase. Please check @arsenm.

https://github.com/llvm/llvm-project/pull/105494