[llvm] [CodeGen][RISCV][AArch64] Added signed extension support to TypePromotion (PR #226304)

[Craig Topper via llvm-commits]

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@@ -269,6 +275,8 @@ bool TypePromotionImpl::isSink(Value *V) {
     return LessOrEqualTypeSize(Return->getReturnValue());
   if (auto *ZExt = dyn_cast<ZExtInst>(V))
     return GreaterThanTypeSize(ZExt);
+  if (auto *SExt = dyn_cast<SExtInst>(V))
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topperc wrote:

Does this change the behavior of the existing Zero extend version?

https://github.com/llvm/llvm-project/pull/226304