added negative FP4 src tests

Author: Pravin Jagtap

llvm/test/CodeGen/AMDGPU/hazards-gfx950.mir

@@ -1009,6 +1009,43 @@ body:             |
     S_SETPC_B64_return undef $sgpr30_sgpr31, implicit killed $vgpr0
 ...
 
+---
+name:            test_cvt_scalef32_pk_f16_fp4_opsel0_neg_hazard
+body:             |
+  bb.0:
+    liveins: $vgpr0, $vgpr1, $vgpr2
+    ; GCN-LABEL: name: test_cvt_scalef32_pk_f16_fp4_opsel0_neg_hazard
+    ; GCN: liveins: $vgpr0, $vgpr1, $vgpr2
+    ; GCN-NEXT: {{  $}}
+    ; GCN-NEXT: S_WAITCNT 0
+    ; GCN-NEXT: renamable $vgpr0 = V_CVT_SCALEF32_PK_F16_FP4_e64 0, killed $vgpr2, 0, killed $vgpr1, 0, implicit $mode, implicit $exec
+    ; GCN-NEXT: renamable $vgpr0 = V_ADD_U32_e32 killed $vgpr0, $vgpr0, implicit $exec
+    ; GCN-NEXT: S_SETPC_B64_return undef $sgpr30_sgpr31, implicit killed $vgpr0
+    S_WAITCNT 0
+    renamable $vgpr0 = V_CVT_SCALEF32_PK_F16_FP4_e64 0, killed $vgpr2, 0, killed $vgpr1, 0, implicit $mode, implicit $exec
+    renamable $vgpr0 = V_ADD_U32_e32 killed $vgpr0, $vgpr0, implicit $exec
+    S_SETPC_B64_return undef $sgpr30_sgpr31, implicit killed $vgpr0
+...
+
+
+---
+name:            test_cvt_scalef32_pk_f16_fp4_opsel3_neg_hazard
+body:             |
+  bb.0:
+    liveins: $vgpr0, $vgpr1, $vgpr2
+    ; GCN-LABEL: name: test_cvt_scalef32_pk_f16_fp4_opsel3_neg_hazard
+    ; GCN: liveins: $vgpr0, $vgpr1, $vgpr2
+    ; GCN-NEXT: {{  $}}
+    ; GCN-NEXT: S_WAITCNT 0
+    ; GCN-NEXT: renamable $vgpr0 = V_CVT_SCALEF32_PK_F16_FP4_e64 4, killed $vgpr2, 4, killed $vgpr1, 0, implicit $mode, implicit $exec
+    ; GCN-NEXT: renamable $vgpr0 = V_ADD_U32_e32 killed $vgpr0, $vgpr0, implicit $exec
+    ; GCN-NEXT: S_SETPC_B64_return undef $sgpr30_sgpr31, implicit killed $vgpr0
+    S_WAITCNT 0
+    renamable $vgpr0 = V_CVT_SCALEF32_PK_F16_FP4_e64 4, killed $vgpr2, 4, killed $vgpr1, 0, implicit $mode, implicit $exec
+    renamable $vgpr0 = V_ADD_U32_e32 killed $vgpr0, $vgpr0, implicit $exec
+    S_SETPC_B64_return undef $sgpr30_sgpr31, implicit killed $vgpr0
+...
+
 ---
 name:            test_cvt_scalef32_hazard_pseudo
 body:             |