Additional testing and rebase

Author: davemgreen

llvm/test/tools/UpdateTestChecks/update_givaluetracking_test_checks/Inputs/const.mir

@@ -15,6 +15,14 @@ body:             |
   ; Note: This comment should not be removed, the check lines below should be updated
   ; CHECK-LABEL: name: @CstWithClass
   ; CHECK-NEXT: %1:_ KnownBits:???????????????????????????????? SignBits:1
-    %0:gpr32 = MOVi32imm 1
+  ; CHECK-NEXT: %named:_ KnownBits:00000000000000000000000000000000???????????????????????????????? SignBits:32
+  ; CHECK-NEXT: %3:_ KnownBits:???????????????????????????????? SignBits:1
+  ; CHECK-NEXT: %4:_ KnownBits:00000000000000000000000000000000 SignBits:32
+    %0:gpr32 = COPY $w0
     %1:_(s32) = COPY %0
+    %named:_(s64) = G_ZEXT %1
+    %2:_(s32), %3:_(s32) = G_UNMERGE_VALUES %named(s64)
+    $w0 = COPY %2(s32)
+    $w1 = COPY %3(s32)
+    RET_ReallyLR
 ...

llvm/test/tools/UpdateTestChecks/update_givaluetracking_test_checks/Inputs/const.mir.expected

@@ -18,6 +18,14 @@ body:             |
   ; Note: This comment should not be removed, the check lines below should be updated
   ; CHECK-LABEL: name: @CstWithClass
   ; CHECK-NEXT: %1:_ KnownBits:???????????????????????????????? SignBits:1
-    %0:gpr32 = MOVi32imm 1
+  ; CHECK-NEXT: %named:_ KnownBits:00000000000000000000000000000000???????????????????????????????? SignBits:32
+  ; CHECK-NEXT: %3:_ KnownBits:???????????????????????????????? SignBits:1
+  ; CHECK-NEXT: %4:_ KnownBits:00000000000000000000000000000000 SignBits:32
+    %0:gpr32 = COPY $w0
     %1:_(s32) = COPY %0
-...
+    %named:_(s64) = G_ZEXT %1
+    %2:_(s32), %3:_(s32) = G_UNMERGE_VALUES %named(s64)
+    $w0 = COPY %2(s32)
+    $w1 = COPY %3(s32)
+    RET_ReallyLR
+...