[llvm] 2cffd19 - [NFC][PowerPC] Delete redundant ISD::TRUNCATE from setTargetDAGCombine (#200902)

[via llvm-commits]

Author: zhijian lin
Date: 2026-07-15T16:49:22-04:00
New Revision: 2cffd1922d06ec79f3c602c4434280450f50f8ba

URL: https://github.com/llvm/llvm-project/commit/2cffd1922d06ec79f3c602c4434280450f50f8ba
DIFF: https://github.com/llvm/llvm-project/commit/2cffd1922d06ec79f3c602c4434280450f50f8ba.diff

LOG: [NFC][PowerPC] Delete redundant ISD::TRUNCATE from setTargetDAGCombine (#200902)

there is 

```
setTargetDAGCombine({ISD::TRUNCATE, ISD::VECTOR_SHUFFLE});

  if (Subtarget.useCRBits()) {
    setTargetDAGCombine({ISD::TRUNCATE, ISD::SETCC, ISD::SELECT_CC});  }
```
  
we do not need to set the (ISD::TRUNCATE again when
Subtarget.useCRBits()

Added: 
    

Modified: 
    llvm/lib/Target/PowerPC/PPCISelLowering.cpp

Removed: 
    


################################################################################
diff  --git a/llvm/lib/Target/PowerPC/PPCISelLowering.cpp b/llvm/lib/Target/PowerPC/PPCISelLowering.cpp
index f6c844b6428ce..91125abb89504 100644
--- a/llvm/lib/Target/PowerPC/PPCISelLowering.cpp
+++ b/llvm/lib/Target/PowerPC/PPCISelLowering.cpp
@@ -1477,7 +1477,7 @@ PPCTargetLowering::PPCTargetLowering(const PPCTargetMachine &TM,
   setTargetDAGCombine({ISD::TRUNCATE, ISD::VECTOR_SHUFFLE});
 
   if (Subtarget.useCRBits()) {
-    setTargetDAGCombine({ISD::TRUNCATE, ISD::SETCC, ISD::SELECT_CC});
+    setTargetDAGCombine({ISD::SETCC, ISD::SELECT_CC});
   }
 
   if (Subtarget.hasP8Vector())