[llvm] d47e2ff - [ValueTracking] Avoid ConstantExpr::getIntegerCast()

[Nikita Popov via llvm-commits]

Author: Nikita Popov
Date: 2023-11-01T11:19:12+01:00
New Revision: d47e2ff8e15d14f5776c8c36b27ba8d6ad392211

URL: https://github.com/llvm/llvm-project/commit/d47e2ff8e15d14f5776c8c36b27ba8d6ad392211
DIFF: https://github.com/llvm/llvm-project/commit/d47e2ff8e15d14f5776c8c36b27ba8d6ad392211.diff

LOG: [ValueTracking] Avoid ConstantExpr::getIntegerCast()

Use ConstantFoldIntegerCast() instead, to remove the reliance on
constant expressions.

Added: 
    

Modified: 
    llvm/lib/Analysis/ValueTracking.cpp

Removed: 
    


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diff  --git a/llvm/lib/Analysis/ValueTracking.cpp b/llvm/lib/Analysis/ValueTracking.cpp
index c303d261107eb19..2458c1cb9f8ec1d 100644
--- a/llvm/lib/Analysis/ValueTracking.cpp
+++ b/llvm/lib/Analysis/ValueTracking.cpp
@@ -5390,10 +5390,9 @@ Value *llvm::isBytewiseValue(Value *V, const DataLayout &DL) {
     if (CE->getOpcode() == Instruction::IntToPtr) {
       if (auto *PtrTy = dyn_cast<PointerType>(CE->getType())) {
         unsigned BitWidth = DL.getPointerSizeInBits(PtrTy->getAddressSpace());
-        return isBytewiseValue(
-            ConstantExpr::getIntegerCast(CE->getOperand(0),
-                                         Type::getIntNTy(Ctx, BitWidth), false),
-            DL);
+        if (Constant *Op = ConstantFoldIntegerCast(
+                CE->getOperand(0), Type::getIntNTy(Ctx, BitWidth), false, DL))
+          return isBytewiseValue(Op, DL);
       }
     }
   }