[Xtensa] Add spill slot for smaller estimaded stack size.

espressif · Dec 27, 2023 · 7ea9cd0 · 7ea9cd0
1 parent a31365f
commit 7ea9cd0
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/llvm/lib/Target/Xtensa/XtensaFrameLowering.cpp b/llvm/lib/Target/Xtensa/XtensaFrameLowering.cpp
@@ -22,6 +22,8 @@
 #include "llvm/CodeGen/RegisterScavenging.h"
 #include "llvm/IR/Function.h"
 
+#define STACK_SIZE_THRESHOLD 100
+
 using namespace llvm;
 
 XtensaFrameLowering::XtensaFrameLowering()
@@ -375,7 +377,8 @@ void XtensaFrameLowering::processFunctionBeforeFrameFinalized(
 
   // In WinABI mode add register scavenging slot
   // FIXME: It may be posssible to add spill slot by more optimal way
-  if (STI.isWinABI() && (MF.getFrameInfo().estimateStackSize(MF) > 256)) {
+  if (STI.isWinABI() &&
+      (MF.getFrameInfo().estimateStackSize(MF) > STACK_SIZE_THRESHOLD)) {
     MachineFrameInfo &MFI = MF.getFrameInfo();
     const TargetRegisterClass &RC = Xtensa::ARRegClass;
     const TargetRegisterInfo &TRI = *MF.getSubtarget().getRegisterInfo();