[llvm] [llvm][ARM][CodeGen] Disable MEMCPY LDM/STM inlining for Cortex v7-m (PR #106378)

[David Green via llvm-commits]

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@@ -192,6 +302,12 @@ SDValue ARMSelectionDAGInfo::EmitTargetCodeForMemcpy(
     return EmitSpecializedLibcall(DAG, dl, Chain, Dst, Src, Size,
                                   Alignment.value(), RTLIB::MEMCPY);
 
+  if (Subtarget.isCortexM7() &&
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davemgreen wrote:

It's best not to use isCortex... functions. Can you add a subtarget feature and add it to the core?

https://github.com/llvm/llvm-project/pull/106378