[llvm] [Codegen] Spill/Restore FP/BP under option (PR #114791)

[via llvm-commits]

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@@ -77,6 +77,11 @@ using MBBVector = SmallVector<MachineBasicBlock *, 4>;
 STATISTIC(NumLeafFuncWithSpills, "Number of leaf functions with CSRs");
 STATISTIC(NumFuncSeen, "Number of functions seen in PEI");
 
+// Experimental Feature enables spilling and reload FP/BP
+static cl::opt<bool>
+    EnableSpillFPBP("enable-spill-fpbp",
+                    cl::desc("Spill clobbered fp register to stack."),
+                    cl::init(false), cl::Hidden);
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mahesh-attarde wrote:

yes.  I have worked out ir output out of llvm-reduce. I can share snippet or ir soon.

https://github.com/llvm/llvm-project/pull/114791