[flang-commits] [clang] [flang] [llvm] [flang] Add -finit-local= to initialize automatic variables (PR #216164)

[Daniel Chen via flang-commits]

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@@ -1661,6 +1661,20 @@ fir::getTypeSizeAndAlignment(mlir::Location loc, mlir::Type ty,
   if (auto recTy = mlir::dyn_cast<fir::RecordType>(ty)) {
     std::uint64_t size = 0;
     unsigned short align = 1;
+    if (recTy.isPacked()) {
+      // Packed records have no inter-field alignment gaps and no tail padding.
+      // LLVM lowers them to packed structs (e.g. <{ i32, double }>) whose ABI
+      // alignment is 1.  Sum the raw component sizes without any rounding.
+      for (auto component : recTy.getTypeList()) {
+        auto result =
+            getTypeSizeAndAlignment(loc, component.second, dl, kindMap);
+        if (!result)
+          return result;
+        auto [compSize, compAlign] = *result;
+        size += llvm::alignTo(compSize, compAlign);
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DanielCChen wrote:

Fixed.

https://github.com/llvm/llvm-project/pull/216164