[llvm] AMDGPU: Add pseudoinstruction for 64-bit agpr or vgpr constants (PR #154499)

[Janek van Oirschot via llvm-commits]

================
@@ -93,3 +101,107 @@ body:             |
     %1:agpr_32 = V_ACCVGPR_WRITE_B32_e64 2, implicit $exec
 
 ...
+
+---
+name: func64
+tracksRegLiveness: true
+stack:
+  - { id: 0, size: 4 }
+body:             |
+  ; HAS-AGPR-LABEL: name: func64
+  ; HAS-AGPR: bb.0:
+  ; HAS-AGPR-NEXT:   successors: %bb.1(0x80000000)
+  ; HAS-AGPR-NEXT:   liveins: $vgpr0_vgpr1
+  ; HAS-AGPR-NEXT: {{  $}}
+  ; HAS-AGPR-NEXT:   [[V_MOV_B64_e64_:%[0-9]+]]:vreg_64_align2 = V_MOV_B64_e64 $vgpr0_vgpr1, implicit $exec
+  ; HAS-AGPR-NEXT:   [[V_MOV_B:%[0-9]+]]:vreg_64_align2 = V_MOV_B64_PSEUDO 54, implicit $exec
+  ; HAS-AGPR-NEXT:   [[V_MOV_B64_e64_1:%[0-9]+]]:vreg_64_align2 = V_MOV_B64_e64 1, implicit $exec
+  ; HAS-AGPR-NEXT:   [[V_MOV_B64_e64_2:%[0-9]+]]:vreg_64_align2 = V_MOV_B64_e64 64, implicit $exec
+  ; HAS-AGPR-NEXT:   [[V_MOV_B64_e64_3:%[0-9]+]]:vreg_64_align2 = V_MOV_B64_e64 %stack.0, implicit $exec
+  ; HAS-AGPR-NEXT:   [[V_MOV_B1:%[0-9]+]]:vreg_64_align2 = V_MOV_B64_PSEUDO 65, implicit $exec
+  ; HAS-AGPR-NEXT:   [[V_MOV_B2:%[0-9]+]]:vreg_64_align2 = V_MOV_B64_PSEUDO 279172874240, implicit $exec
+  ; HAS-AGPR-NEXT:   [[V_MOV_B3:%[0-9]+]]:vreg_64_align2 = V_MOV_B64_PSEUDO 279172874305, implicit $exec
+  ; HAS-AGPR-NEXT:   [[V_MOV_B4:%[0-9]+]]:vreg_64_align2 = V_MOV_B64_PSEUDO 4290672329938, implicit $exec
+  ; HAS-AGPR-NEXT:   [[V_MOV_B5:%[0-9]+]]:vreg_64_align2 = V_MOV_B64_PSEUDO -9223372036854775808, implicit $exec
+  ; HAS-AGPR-NEXT:   [[V_MOV_B6:%[0-9]+]]:vreg_64_align2 = V_MOV_B64_PSEUDO 1042479491, implicit $exec
+  ; HAS-AGPR-NEXT:   [[V_MOV_B7:%[0-9]+]]:vreg_64_align2 = V_MOV_B64_PSEUDO 4477415320595726336, implicit $exec
+  ; HAS-AGPR-NEXT:   [[V_MOV_B8:%[0-9]+]]:vreg_64_align2 = V_MOV_B64_PSEUDO $vgpr0_vgpr1, implicit $exec
+  ; HAS-AGPR-NEXT:   [[V_MOV_B9:%[0-9]+]]:vreg_64_align2 = V_MOV_B64_PSEUDO %stack.0, implicit $exec
+  ; HAS-AGPR-NEXT: {{  $}}
+  ; HAS-AGPR-NEXT: bb.1:
+  ; HAS-AGPR-NEXT:   [[V_MOV_B64_e64_4:%[0-9]+]]:vreg_64_align2 = V_MOV_B64_e64 3, implicit $exec
+  ;
+  ; NO-AGPR-LABEL: name: func64
+  ; NO-AGPR: bb.0:
+  ; NO-AGPR-NEXT:   successors: %bb.1(0x80000000)
+  ; NO-AGPR-NEXT:   liveins: $vgpr0_vgpr1
+  ; NO-AGPR-NEXT: {{  $}}
+  ; NO-AGPR-NEXT:   [[V_MOV_B64_e64_:%[0-9]+]]:vreg_64_align2 = V_MOV_B64_e64 $vgpr0_vgpr1, implicit $exec
+  ; NO-AGPR-NEXT:   [[V_MOV_B:%[0-9]+]]:vreg_64_align2 = V_MOV_B64_PSEUDO 54, implicit $exec
+  ; NO-AGPR-NEXT:   [[V_MOV_B64_e64_1:%[0-9]+]]:vreg_64_align2 = V_MOV_B64_e64 1, implicit $exec
+  ; NO-AGPR-NEXT:   [[V_MOV_B64_e64_2:%[0-9]+]]:vreg_64_align2 = V_MOV_B64_e64 64, implicit $exec
+  ; NO-AGPR-NEXT:   [[V_MOV_B64_e64_3:%[0-9]+]]:vreg_64_align2 = V_MOV_B64_e64 %stack.0, implicit $exec
+  ; NO-AGPR-NEXT:   [[V_MOV_B1:%[0-9]+]]:vreg_64_align2 = V_MOV_B64_PSEUDO 65, implicit $exec
+  ; NO-AGPR-NEXT:   [[V_MOV_B2:%[0-9]+]]:vreg_64_align2 = V_MOV_B64_PSEUDO 279172874240, implicit $exec
+  ; NO-AGPR-NEXT:   [[V_MOV_B3:%[0-9]+]]:vreg_64_align2 = V_MOV_B64_PSEUDO 279172874305, implicit $exec
+  ; NO-AGPR-NEXT:   [[V_MOV_B4:%[0-9]+]]:vreg_64_align2 = V_MOV_B64_PSEUDO 4290672329938, implicit $exec
+  ; NO-AGPR-NEXT:   [[V_MOV_B5:%[0-9]+]]:vreg_64_align2 = V_MOV_B64_PSEUDO -9223372036854775808, implicit $exec
+  ; NO-AGPR-NEXT:   [[V_MOV_B6:%[0-9]+]]:vreg_64_align2 = V_MOV_B64_PSEUDO 1042479491, implicit $exec
+  ; NO-AGPR-NEXT:   [[V_MOV_B7:%[0-9]+]]:vreg_64_align2 = V_MOV_B64_PSEUDO 4477415320595726336, implicit $exec
+  ; NO-AGPR-NEXT:   [[V_MOV_B8:%[0-9]+]]:vreg_64_align2 = V_MOV_B64_PSEUDO $vgpr0_vgpr1, implicit $exec
+  ; NO-AGPR-NEXT:   [[V_MOV_B9:%[0-9]+]]:vreg_64_align2 = V_MOV_B64_PSEUDO %stack.0, implicit $exec
+  ; NO-AGPR-NEXT: {{  $}}
+  ; NO-AGPR-NEXT: bb.1:
+  ; NO-AGPR-NEXT:   [[V_MOV_B64_e64_4:%[0-9]+]]:vreg_64_align2 = V_MOV_B64_e64 3, implicit $exec
+  bb.0:
----------------
JanekvO wrote:

Not sure I understand why these `v_mov_b64` tests are added; are you trying to pad more `v_mov_b64` tests or are these meant to turn into the `AV_MOV_B64`  pseudo at some point?

https://github.com/llvm/llvm-project/pull/154499