[flang-commits] [flang] [flang] Insert stacksave/stackrestore when alloca are present in loops (PR #95173)

[Slava Zakharin via flang-commits]

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@@ -51,6 +53,7 @@ class CfgLoopConv : public mlir::OpRewritePattern<fir::DoLoopOp> {
   matchAndRewrite(DoLoopOp loop,
                   mlir::PatternRewriter &rewriter) const override {
     auto loc = loop.getLoc();
+    bool hasAllocas = !loop.getBody()->getOps<fir::AllocaOp>().empty();
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vzakhari wrote:

Please also note that @VijayKandiah is going to make changes in the code-gen to hoist constant-sized allocas to an entry block, so stacksave/stackrestore might be avoided in such cases.

https://github.com/llvm/llvm-project/pull/95173