[llvm] [CodeGen] Use MCRegister for ignoreCSRForAllocationOrder. (PR #123685)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-backend-arm

Author: Craig Topper (topperc)

<details>
<summary>Changes</summary>



---
Full diff: https://github.com/llvm/llvm-project/pull/123685.diff


3 Files Affected:

- (modified) llvm/include/llvm/CodeGen/TargetSubtargetInfo.h (+1-1) 
- (modified) llvm/lib/Target/ARM/ARMSubtarget.cpp (+1-1) 
- (modified) llvm/lib/Target/ARM/ARMSubtarget.h (+1-1) 


``````````diff
diff --git a/llvm/include/llvm/CodeGen/TargetSubtargetInfo.h b/llvm/include/llvm/CodeGen/TargetSubtargetInfo.h
index a94ebf55f6c1ef..76c94981e1afce 100644
--- a/llvm/include/llvm/CodeGen/TargetSubtargetInfo.h
+++ b/llvm/include/llvm/CodeGen/TargetSubtargetInfo.h
@@ -324,7 +324,7 @@ class TargetSubtargetInfo : public MCSubtargetInfo {
   /// written in the tablegen descriptions, false if it should allocate
   /// the specified physical register later if is it callee-saved.
   virtual bool ignoreCSRForAllocationOrder(const MachineFunction &MF,
-                                           unsigned PhysReg) const {
+                                           MCRegister PhysReg) const {
     return false;
   }
 
diff --git a/llvm/lib/Target/ARM/ARMSubtarget.cpp b/llvm/lib/Target/ARM/ARMSubtarget.cpp
index 07207e29bf7d3a..893084785e6f05 100644
--- a/llvm/lib/Target/ARM/ARMSubtarget.cpp
+++ b/llvm/lib/Target/ARM/ARMSubtarget.cpp
@@ -478,7 +478,7 @@ unsigned ARMSubtarget::getGPRAllocationOrder(const MachineFunction &MF) const {
 }
 
 bool ARMSubtarget::ignoreCSRForAllocationOrder(const MachineFunction &MF,
-                                               unsigned PhysReg) const {
+                                               MCRegister PhysReg) const {
   // To minimize code size in Thumb2, we prefer the usage of low regs (lower
   // cost per use) so we can  use narrow encoding. By default, caller-saved
   // registers (e.g. lr, r12) are always  allocated first, regardless of
diff --git a/llvm/lib/Target/ARM/ARMSubtarget.h b/llvm/lib/Target/ARM/ARMSubtarget.h
index 611eeac9ef7128..7329d3f2055f0c 100644
--- a/llvm/lib/Target/ARM/ARMSubtarget.h
+++ b/llvm/lib/Target/ARM/ARMSubtarget.h
@@ -523,7 +523,7 @@ class ARMSubtarget : public ARMGenSubtargetInfo {
   }
 
   bool ignoreCSRForAllocationOrder(const MachineFunction &MF,
-                                   unsigned PhysReg) const override;
+                                   MCRegister PhysReg) const override;
   unsigned getGPRAllocationOrder(const MachineFunction &MF) const;
 };
 

``````````

</details>


https://github.com/llvm/llvm-project/pull/123685