[clang] [llvm] [mlir] [InferAttrs] Mark errnomem-setting libcalls as such (PR #124742)

[Eli Friedman via cfe-commits]

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@@ -703,13 +737,15 @@ bool llvm::inferNonMandatoryLibFuncAttrs(Function &F,
     Changed |= setDoesNotCapture(F, 1);
     Changed |= setOnlyReadsMemory(F, 0);
     Changed |= setOnlyReadsMemory(F, 1);
+    Changed |= setOnlyAccessesErrnoMemory(F);
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efriedma-quic wrote:

setOnlyAccessesInaccessibleMemOrErrnoMem()?

https://github.com/llvm/llvm-project/pull/124742
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