[llvm] [LICM] Improve hoisting of calls marked with invariant_load metadata (PR #193678)

[Matt Arsenault via llvm-commits]

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@@ -7305,6 +7305,9 @@ bool llvm::isSafeToSpeculativelyExecuteWithOpcode(
       return false;
     const Function *Callee = CI->getCalledFunction();
 
+    // Assume we can always speculate invariant loads.
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arsenm wrote:

I thought speculatable was specifically disallowed on call sites 

https://github.com/llvm/llvm-project/pull/193678