[flang-commits] [flang] [flang] Add an alignment attribute to fir.alloca (PR #234897)

[Eugene Epshteyn via flang-commits]

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@@ -3848,8 +3856,11 @@ struct GlobalOpConversion : public fir::FIROpConversion<fir::GlobalOp> {
         0, getGlobalAddressSpace(rewriter), false,
         mlir::LLVM::ThreadLocalMode::NotThreadLocal, comdat, attrs, dbgExprs);
 
+    // A requested alignment is a minimum: never go below the ABI alignment of
+    // the global's type.
     if (global.getAlignment() && *global.getAlignment() > 0)
-      g.setAlignment(*global.getAlignment());
+      g.setAlignment(std::max<std::uint64_t>(
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eugeneepshteyn wrote:

Done: added @g_aligned (64 kept) and @g_underaligned (2 raised to 4) to convert-to-llvm.fir.

https://github.com/llvm/llvm-project/pull/234897