[llvm-branch-commits] [llvm] release/22.x: MIPS: Fix unsigned compare with zero in MipsSEInstrInfo::copyPhysReg (#179866) (PR #179893)

[via llvm-branch-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-backend-mips

Author: None (llvmbot)

<details>
<summary>Changes</summary>

Backport 209ff8bf06dd12becd79c1ebb01612c021e19f6c

Requested by: @<!-- -->wzssyqa

---
Full diff: https://github.com/llvm/llvm-project/pull/179893.diff


1 Files Affected:

- (modified) llvm/lib/Target/Mips/MipsSEInstrInfo.cpp (+2-2) 


``````````diff
diff --git a/llvm/lib/Target/Mips/MipsSEInstrInfo.cpp b/llvm/lib/Target/Mips/MipsSEInstrInfo.cpp
index 4a92b1ffc4cf9..90f2996e7f93e 100644
--- a/llvm/lib/Target/Mips/MipsSEInstrInfo.cpp
+++ b/llvm/lib/Target/Mips/MipsSEInstrInfo.cpp
@@ -242,7 +242,7 @@ void MipsSEInstrInfo::copyPhysReg(MachineBasicBlock &MBB,
       Opc = Mips::FMOV_D64;
       unsigned DestRegOff = DestReg.id() - Mips::D0_64;
       unsigned SrcRegOff = SrcReg.id() - Mips::F0;
-      if (SrcRegOff == DestRegOff && SrcRegOff >= 0 && SrcRegOff <= 31)
+      if (SrcRegOff == DestRegOff && SrcRegOff <= 31)
         return;
     }
   } else if (Opc == 0 && Mips::FGR32RegClass.contains(DestReg) &&
@@ -253,7 +253,7 @@ void MipsSEInstrInfo::copyPhysReg(MachineBasicBlock &MBB,
       Opc = Mips::FMOV_D32;
       unsigned DestRegOff = DestReg.id() - Mips::F0;
       unsigned SrcRegOff = SrcReg.id() - Mips::D0_64;
-      if (SrcRegOff == DestRegOff && SrcRegOff >= 0 && SrcRegOff <= 31)
+      if (SrcRegOff == DestRegOff && SrcRegOff <= 31)
         return;
     }
   }

``````````

</details>


https://github.com/llvm/llvm-project/pull/179893