[PATCH] D15515: [AArch64] Add missing extract extend patterns

[silviu.baranga@arm.com via llvm-commits]

sbaranga added inline comments.

================
Comment at: lib/Target/AArch64/AArch64InstrInfo.td:3809
@@ -3808,1 +3808,3 @@
 
+def : Pat<(sext_inreg (i64 (anyext (vector_extract (v16i8 V128:$Rn),
+            VectorIndexB:$idx))), i8),
----------------
Any idea why we don't have (anyext (vector_extract (...) ) -> vector_extract ( )?

I see that vector_extract is EXTRACT_VECTOR_ELT, which according to ISDOpcodes.h should be able to perform the anyext operation. If that would happen, wouldn't one of the patterns above match this?


http://reviews.llvm.org/D15515