[llvm] [IR] Initial introduction of memset_pattern (PR #97583)

[Yingwei Zheng via llvm-commits]

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@@ -1249,6 +1252,21 @@ class MemSetInlineInst : public MemSetInst {
   }
 };
 
+/// This class wraps the llvm.memset.pattern intrinsic.
+class MemSetPatternInst : public MemSetInst {
+public:
+  ConstantInt *getLength() const {
+    return cast<ConstantInt>(MemSetInst::getLength());
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dtcxzyw wrote:

IIRC the constant length restriction has been removed.

See also https://discourse.llvm.org/t/rfc-introducing-an-llvm-memset-pattern-inline-intrinsic/79496/5.


https://github.com/llvm/llvm-project/pull/97583