[llvm] [IR] Add `samesign` flag to icmp instruction (PR #111419)

[Nikita Popov via llvm-commits]

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@@ -5482,6 +5482,8 @@ Error BitcodeReader::parseFunctionBody(Function *F) {
         if (!CmpInst::isIntPredicate(PredVal))
           return error("Invalid icmp predicate");
         I = new ICmpInst(PredVal, LHS, RHS);
+        if (Record[OpNum] & (1 << bitc::PSSI_SAME_SIGN))
+          cast<ICmpInst>(I)->setSameSign(true);
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nikic wrote:

The bitcode writer only appends the flags record if there are flags, so the bitcode reader needs to check the number of records to determine whether there are any flags.

https://github.com/llvm/llvm-project/pull/111419