[llvm] a1e1c24 - [ConstantFolding] Avoid use of ConstantExpr::getLShr() (NFC)

[Nikita Popov via llvm-commits]

Author: Nikita Popov
Date: 2023-11-10T15:06:18+01:00
New Revision: a1e1c24331b7b67ae59a880d263620c614cdb918

URL: https://github.com/llvm/llvm-project/commit/a1e1c24331b7b67ae59a880d263620c614cdb918
DIFF: https://github.com/llvm/llvm-project/commit/a1e1c24331b7b67ae59a880d263620c614cdb918.diff

LOG: [ConstantFolding] Avoid use of ConstantExpr::getLShr() (NFC)

Work on APInt instead.

Added: 
    

Modified: 
    llvm/lib/Analysis/ConstantFolding.cpp

Removed: 
    


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diff  --git a/llvm/lib/Analysis/ConstantFolding.cpp b/llvm/lib/Analysis/ConstantFolding.cpp
index ce43af8adc0bd95..966a65ac26b8017 100644
--- a/llvm/lib/Analysis/ConstantFolding.cpp
+++ b/llvm/lib/Analysis/ConstantFolding.cpp
@@ -273,12 +273,11 @@ Constant *FoldBitCast(Constant *C, Type *DestTy, const DataLayout &DL) {
     for (unsigned j = 0; j != Ratio; ++j) {
       // Shift the piece of the value into the right place, depending on
       // endianness.
-      Constant *Elt = ConstantExpr::getLShr(Src,
-                                  ConstantInt::get(Src->getType(), ShiftAmt));
+      APInt Elt = Src->getValue().lshr(ShiftAmt);
       ShiftAmt += isLittleEndian ? DstBitSize : -DstBitSize;
 
       // Truncate and remember this piece.
-      Result.push_back(ConstantExpr::getTrunc(Elt, DstEltTy));
+      Result.push_back(ConstantInt::get(DstEltTy, Elt.trunc(DstBitSize)));
     }
   }