[llvm] IPRA:Fix crash and verification failures for PLT calls (PR #196917)

[via llvm-commits]

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@@ -154,7 +154,8 @@ bool RegUsageInfoPropagation::run(MachineFunction &MF) {
       };
 
       if (const Function *F = findCalledFunction(M, MI)) {
-        if (F->isDefinitionExact()) {
+        // The Function must not be preemptable.
+        if (F->isDefinitionExact() && F->isDSOLocal()) {
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vigbalu wrote:

@MaskRay , can you help us to conclude this ?
Should we modify `isDefinitionExact` to accommodate  `isDSOLocal` as @lenary suggests ?

https://github.com/llvm/llvm-project/pull/196917