[llvm] [DAGCombine] Propagate truncate to operands (PR #98666)

[Craig Topper via llvm-commits]

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@@ -5798,10 +5801,12 @@ SDValue DAGCombiner::hoistLogicOpWithSameOpcodeHands(SDNode *N) {
     if (LegalOperations && !TLI.isOperationLegal(LogicOpcode, XVT))
       return SDValue();
     // Be extra careful sinking truncate. If it's free, there's no benefit in
-    // widening a binop. Also, don't create a logic op on an illegal type.
+    // widening a binop.
     if (TLI.isZExtFree(VT, XVT) && TLI.isTruncateFree(XVT, VT))
       return SDValue();
-    if (!TLI.isTypeLegal(XVT))
+    // Prevent an infinite loop if the target preferts the inverse
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topperc wrote:

prefers*

https://github.com/llvm/llvm-project/pull/98666