[clang] [llvm] [RISCV] Add stack clash protection (PR #117612)

[Raphael Moreira Zinsly via cfe-commits]

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@@ -610,22 +610,134 @@ static MCCFIInstruction createDefCFAOffset(const 
TargetRegisterInfo &TRI,
                                         Comment.str());
 }
 
+// Allocate stack space and probe it if necessary.
 void RISCVFrameLowering::allocateStack(MachineBasicBlock &MBB,
                                        MachineBasicBlock::iterator MBBI,
-                                       StackOffset Offset, bool EmitCFI,
-                                       unsigned CFIIndex) const {
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rzinsly wrote:

Ok, I created a opened a new one: 
https://github.com/llvm/llvm-project/pull/117871

https://github.com/llvm/llvm-project/pull/117612
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