[LV] Modernize as_cast.ll test. (NFC) (#195481)

Update as_cast.ll to cover both loop-invariant and varying address space
casts, as well as auto-generating the checks.

Author: fhahn

llvm/test/Transforms/LoopVectorize/as_cast.ll

@@ -1,40 +1,106 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --check-globals none --version 6
 ; RUN: opt -passes=loop-vectorize %s -force-vector-width=1 -force-vector-interleave=2 -S -o - | FileCheck %s
 
-define void @foo(ptr addrspace(1) %in) {
+define void @loop_invariant_as_cast(ptr addrspace(1) %in) {
+; CHECK-LABEL: define void @loop_invariant_as_cast(
+; CHECK-SAME: ptr addrspace(1) [[IN:%.*]]) {
+; CHECK-NEXT:  [[ENTRY:.*:]]
+; CHECK-NEXT:    br label %[[VECTOR_PH:.*]]
+; CHECK:       [[VECTOR_PH]]:
+; CHECK-NEXT:    br label %[[VECTOR_BODY:.*]]
+; CHECK:       [[VECTOR_BODY]]:
+; CHECK-NEXT:    [[INDEX:%.*]] = phi i64 [ 0, %[[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], %[[PRED_STORE_CONTINUE2:.*]] ]
+; CHECK-NEXT:    [[TMP0:%.*]] = add i64 [[INDEX]], 1
+; CHECK-NEXT:    [[TMP1:%.*]] = icmp ule i64 [[INDEX]], 6
+; CHECK-NEXT:    [[TMP2:%.*]] = icmp ule i64 [[TMP0]], 6
+; CHECK-NEXT:    br i1 [[TMP1]], label %[[PRED_STORE_IF:.*]], label %[[PRED_STORE_CONTINUE:.*]]
+; CHECK:       [[PRED_STORE_IF]]:
+; CHECK-NEXT:    [[TMP3:%.*]] = add i64 [[INDEX]], 1
+; CHECK-NEXT:    [[TMP4:%.*]] = addrspacecast ptr addrspace(1) [[IN]] to ptr
+; CHECK-NEXT:    [[TMP5:%.*]] = getelementptr inbounds i64, ptr [[TMP4]], i64 [[TMP3]]
+; CHECK-NEXT:    store i64 [[TMP3]], ptr [[TMP5]], align 4
+; CHECK-NEXT:    br label %[[PRED_STORE_CONTINUE]]
+; CHECK:       [[PRED_STORE_CONTINUE]]:
+; CHECK-NEXT:    br i1 [[TMP2]], label %[[PRED_STORE_IF1:.*]], label %[[PRED_STORE_CONTINUE2]]
+; CHECK:       [[PRED_STORE_IF1]]:
+; CHECK-NEXT:    [[TMP6:%.*]] = add i64 [[TMP0]], 1
+; CHECK-NEXT:    [[TMP7:%.*]] = addrspacecast ptr addrspace(1) [[IN]] to ptr
+; CHECK-NEXT:    [[TMP8:%.*]] = getelementptr inbounds i64, ptr [[TMP7]], i64 [[TMP6]]
+; CHECK-NEXT:    store i64 [[TMP6]], ptr [[TMP8]], align 4
+; CHECK-NEXT:    br label %[[PRED_STORE_CONTINUE2]]
+; CHECK:       [[PRED_STORE_CONTINUE2]]:
+; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 2
+; CHECK-NEXT:    [[TMP9:%.*]] = icmp eq i64 [[INDEX_NEXT]], 8
+; CHECK-NEXT:    br i1 [[TMP9]], label %[[MIDDLE_BLOCK:.*]], label %[[VECTOR_BODY]], !llvm.loop [[LOOP0:![0-9]+]]
+; CHECK:       [[MIDDLE_BLOCK]]:
+; CHECK-NEXT:    br label %[[EXIT:.*]]
+; CHECK:       [[EXIT]]:
+; CHECK-NEXT:    ret void
+;
 entry:
   br label %loop
 
 loop:
-  %iter = phi i64 [ %next, %loop ], [ 0, %entry ]
+  %iv = phi i64 [ %iv.next, %loop ], [ 0, %entry ]
   %ascast = addrspacecast ptr addrspace(1) %in to ptr
-  %next = add i64 %iter, 1
-  %arrayidx = getelementptr inbounds i64, ptr %ascast, i64 %next
-  store i64 %next, ptr %arrayidx, align 4
+  %iv.next = add i64 %iv, 1
+  %gep = getelementptr inbounds i64, ptr %ascast, i64 %iv.next
+  store i64 %iv.next, ptr %gep, align 4
+  %cmp = icmp eq i64 %iv.next, 7
+  br i1 %cmp, label %exit, label %loop
 
-; check that we find the two interleaved blocks with ascast, gep and store:
-; CHECK: pred.store.if:
-; CHECK: [[ID1:%.*]] = add i64 %{{.*}}, 1
-; CHECK: [[AS1:%.*]] = addrspacecast ptr addrspace(1) %{{.*}} to ptr
-; CHECK: [[GEP1:%.*]] = getelementptr inbounds i64, ptr [[AS1]], i64 [[ID1]]
-; CHECK: store i64 [[ID1]], ptr [[GEP1]]
+exit:
+  ret void
+}
 
-; CHECK: pred.store.if1:
-; CHECK: [[ID2:%.*]] = add i64 %{{.*}}, 1
-; CHECK: [[AS2:%.*]] = addrspacecast ptr addrspace(1) %in to ptr
-; CHECK: [[GEP2:%.*]] = getelementptr inbounds i64, ptr [[AS2]], i64 [[ID2]]
-; CHECK: store i64 [[ID2]], ptr [[GEP2]], align 4
+define void @loop_varying_as_cast(ptr addrspace(1) %in) {
+; CHECK-LABEL: define void @loop_varying_as_cast(
+; CHECK-SAME: ptr addrspace(1) [[IN:%.*]]) {
+; CHECK-NEXT:  [[ENTRY:.*:]]
+; CHECK-NEXT:    br label %[[VECTOR_PH:.*]]
+; CHECK:       [[VECTOR_PH]]:
+; CHECK-NEXT:    br label %[[VECTOR_BODY:.*]]
+; CHECK:       [[VECTOR_BODY]]:
+; CHECK-NEXT:    [[INDEX:%.*]] = phi i64 [ 0, %[[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], %[[PRED_STORE_CONTINUE2:.*]] ]
+; CHECK-NEXT:    [[TMP0:%.*]] = add i64 [[INDEX]], 1
+; CHECK-NEXT:    [[TMP1:%.*]] = icmp ule i64 [[INDEX]], 6
+; CHECK-NEXT:    [[TMP2:%.*]] = icmp ule i64 [[TMP0]], 6
+; CHECK-NEXT:    br i1 [[TMP1]], label %[[PRED_STORE_IF:.*]], label %[[PRED_STORE_CONTINUE:.*]]
+; CHECK:       [[PRED_STORE_IF]]:
+; CHECK-NEXT:    [[TMP3:%.*]] = add i64 [[INDEX]], 1
+; CHECK-NEXT:    [[TMP4:%.*]] = getelementptr inbounds i64, ptr addrspace(1) [[IN]], i64 [[TMP3]]
+; CHECK-NEXT:    [[TMP5:%.*]] = addrspacecast ptr addrspace(1) [[TMP4]] to ptr
+; CHECK-NEXT:    store i64 [[TMP3]], ptr [[TMP5]], align 4
+; CHECK-NEXT:    br label %[[PRED_STORE_CONTINUE]]
+; CHECK:       [[PRED_STORE_CONTINUE]]:
+; CHECK-NEXT:    br i1 [[TMP2]], label %[[PRED_STORE_IF1:.*]], label %[[PRED_STORE_CONTINUE2]]
+; CHECK:       [[PRED_STORE_IF1]]:
+; CHECK-NEXT:    [[TMP6:%.*]] = add i64 [[TMP0]], 1
+; CHECK-NEXT:    [[TMP7:%.*]] = getelementptr inbounds i64, ptr addrspace(1) [[IN]], i64 [[TMP6]]
+; CHECK-NEXT:    [[TMP8:%.*]] = addrspacecast ptr addrspace(1) [[TMP7]] to ptr
+; CHECK-NEXT:    store i64 [[TMP6]], ptr [[TMP8]], align 4
+; CHECK-NEXT:    br label %[[PRED_STORE_CONTINUE2]]
+; CHECK:       [[PRED_STORE_CONTINUE2]]:
+; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 2
+; CHECK-NEXT:    [[TMP9:%.*]] = icmp eq i64 [[INDEX_NEXT]], 8
+; CHECK-NEXT:    br i1 [[TMP9]], label %[[MIDDLE_BLOCK:.*]], label %[[VECTOR_BODY]], !llvm.loop [[LOOP3:![0-9]+]]
+; CHECK:       [[MIDDLE_BLOCK]]:
+; CHECK-NEXT:    br label %[[EXIT:.*]]
+; CHECK:       [[EXIT]]:
+; CHECK-NEXT:    ret void
+;
+entry:
+  br label %loop
 
-  %cmp = icmp eq i64 %next, 7
+loop:
+  %iv = phi i64 [ %iv.next, %loop ], [ 0, %entry ]
+  %iv.next = add i64 %iv, 1
+  %gep = getelementptr inbounds i64, ptr addrspace(1) %in, i64 %iv.next
+  %ascast = addrspacecast ptr addrspace(1) %gep to ptr
+  store i64 %iv.next, ptr %ascast, align 4
+  %cmp = icmp eq i64 %iv.next, 7
   br i1 %cmp, label %exit, label %loop
 
-; check that we branch to the exit block
-; CHECK: middle.block:
-; CHECK: br label %exit
-
 exit:
   ret void
-; CHECK: exit:
-; CHECK:   ret void
 }
-
-; CHECK: !{{[0-9]*}} = !{!"llvm.loop.isvectorized", i32 1}