================
@@ -154,11 +154,20 @@ llvm::Value
*CodeGen::emitRoundPointerUpToAlignment(CodeGenFunction &CGF,
llvm::Value *Ptr,
CharUnits Align) {
// OverflowArgArea = (OverflowArgArea + Align - 1) & -Align;
+ Ptr = CGF.Builder.CreateAddrSpaceCast(Ptr, CGF.AllocaInt8PtrTy,
+ Ptr->getName() + ".addrcast");
llvm::Value *RoundUp = CGF.Builder.CreateConstInBoundsGEP1_32(
CGF.Builder.getInt8Ty(), Ptr, Align.getQuantity() - 1);
+
+ // ptrmask is sensitive to the bitwidth of the mask
+ unsigned IndexTypeSize =
+ CGF.CGM.getDataLayout().getIndexTypeSizeInBits(RoundUp->getType());
+ llvm::IntegerType *MaskType =
+ llvm::IntegerType::get(CGF.getLLVMContext(), IndexTypeSize);
+
return CGF.Builder.CreateIntrinsic(
- llvm::Intrinsic::ptrmask, {CGF.AllocaInt8PtrTy, CGF.IntPtrTy},
- {RoundUp, llvm::ConstantInt::get(CGF.IntPtrTy, -Align.getQuantity())},
+ llvm::Intrinsic::ptrmask, {CGF.AllocaInt8PtrTy, MaskType},
----------------
arsenm wrote:
This seems like it was bad to begin with, I think this should have just been
using Ptr->getType() instead of the CFG types
https://github.com/llvm/llvm-project/pull/89007
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