if (!TII->isStridedAccess(MI))
continue;
- LoadInfo LdI = *getLoadInfo(MI);
- unsigned OldTag = *getTag(TRI, MI, LdI);
- auto &OldCollisions = TagMap[OldTag];
+ Optional<LoadInfo> OptLdI = getLoadInfo(MI);
+ if (!OptLdI)
+ continue;
+ LoadInfo LdI = *OptLdI;
+ Optional<unsigned> OptOldTag = getTag(TRI, MI, LdI);
+ if (!OptOldTag)
+ continue;
+ auto &OldCollisions = TagMap[*OptOldTag];
if (OldCollisions.size() <= 1)
continue;
bb.1:
RET_ReallyLR
...
+---
+# Check that we handle case of strided load with no HW prefetcher tag correctly.
+
+# CHECK-LABEL: name: hwpf_notagbug
+# CHECK-NOT: ORRXrs %xzr
+# CHECK: LDARW %x1
+# CHECK-NOT: ORRXrs %xzr
+# CHECK: LDRWui %x1
+name: hwpf_notagbug
+tracksRegLiveness: true
+body: |
+ bb.0:
+ liveins: %w0, %x1, %x17
+
+ %w1 = LDARW %x1 :: ("aarch64-strided-access" load 4)
+ %w1 = LDRWui %x1, 0 :: ("aarch64-strided-access" load 4)
+ %w17 = LDRWui %x17, 0 :: ("aarch64-strided-access" load 4)
+
+ %w0 = SUBWri %w0, 1, 0
+ %wzr = SUBSWri %w0, 0, 0, implicit-def %nzcv
+ Bcc 9, %bb.0, implicit %nzcv
+
+ bb.1:
+ RET_ReallyLR
+...