[PATCH] D41149: [CodeGen] Specialize mixed-sign mul-with-overflow (fix PR34920)

[Eli Friedman via Phabricator via cfe-commits]

efriedma added inline comments.


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Comment at: test/CodeGen/builtins-overflow.c:402
+  int result;
+  if (__builtin_mul_overflow(y, x, &result))
+    return LongLongErrorCode;
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I think the rules for __builtin_mul_overflow say you have to check whether the truncate changes the value of the result.

Missing testcases for the case where the result is unsigned.


https://reviews.llvm.org/D41149