[llvm] [CodeGenPrepare] don't promote sdiv/srem by -1 (PR #218737)

[Nikita Popov via llvm-commits]

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@@ -8367,6 +8367,11 @@ class VectorPromoteHelper {
   /// Check if it is profitable to promote \p ToBePromoted
   /// by moving downward the transition through.
   bool shouldPromote(const Instruction *ToBePromoted) const {
+    if (!isSafeToSpeculativelyExecute(
+            ToBePromoted, /*CtxI=*/nullptr, /*AC=*/nullptr, /*DT=*/nullptr,
+            /*TLI=*/nullptr, /*UseVariableInfo=*/false,
+            /*IgnoreUBImplyingAttrs=*/false))
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nikic wrote:

Use isSafeToSpeculativelyExecuteWithVariableReplaced() instead?

https://github.com/llvm/llvm-project/pull/218737