[llvm] [llvm][ARM]Add widen strings pass (PR #107120)

[David Green via llvm-commits]

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@@ -2058,6 +2199,14 @@ OptimizeGlobalVars(Module &M,
       continue;
     }
 
+    // Pad global strings if allowed
+    for (Function &F : llvm::make_early_inc_range(M)) {
+      TargetTransformInfo &TTI = GetTTI(F);
+      if (TTI.useWidenGlobalStrings()) {
+        Changed |= tryWidenGlobalStrings(F, GetTTI);
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davemgreen wrote:

Could this either be in OptimizeFunctions, or look for the uses of global variables to find the memcpy? The aim would be to keep the runtime down by limiting what needs to be scanned through.

https://github.com/llvm/llvm-project/pull/107120