[llvm] [BasicBlockSections] Allow mixing of -basic-block-sections with MFS. (PR #117076)

[Rahman Lavaee via llvm-commits]

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@@ -128,6 +129,9 @@ static bool isColdBlock(const MachineBasicBlock &MBB,
 }
 
 bool MachineFunctionSplitter::runOnMachineFunction(MachineFunction &MF) {
+  // Do not split functions when -basic-block-sections=all is specified.
+  if (MF.getTarget().getBBSectionsType() == llvm::BasicBlockSection::All)
+    return false;
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rlavaee wrote:

Yes. This applies for AutoFDO builds. The idea is to apply Propeller for functions whose BasicBlockAddressMap structure doesn't change since the profile was collected (even though those functions may have been optimized by autofdo).

https://github.com/llvm/llvm-project/pull/117076