[llvm] [Xtensa] Implement sextload i8 (PR #106053)

[Sergei Barannikov via llvm-commits]

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@@ -70,11 +70,12 @@ XtensaTargetLowering::XtensaTargetLowering(const TargetMachine &TM,
   setOperationAction(ISD::FP_TO_UINT, MVT::i32, Expand);
   setOperationAction(ISD::FP_TO_SINT, MVT::i32, Expand);
 
-  // No sign extend instructions for i1
+  // No sign extend instructions for i1 and sign extend load i8
   for (MVT VT : MVT::integer_valuetypes()) {
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s-barannikov wrote:

FWIW you only need to set actions for legal VTs, that is only for `VT == MVT::i32`.


https://github.com/llvm/llvm-project/pull/106053