================
@@ -1336,75 +1336,56 @@ static llvm::Value *CreateCoercedLoad(Address Src,
llvm::Type *Ty,
return CGF.Builder.CreateLoad(Tmp);
}
-// Function to store a first-class aggregate into memory. We prefer to
-// store the elements rather than the aggregate to be more friendly to
-// fast-isel.
-// FIXME: Do we need to recurse here?
-void CodeGenFunction::EmitAggregateStore(llvm::Value *Val, Address Dest,
- bool DestIsVolatile) {
- // Prefer scalar stores to first-class aggregate stores.
- if (llvm::StructType *STy = dyn_cast<llvm::StructType>(Val->getType())) {
- for (unsigned i = 0, e = STy->getNumElements(); i != e; ++i) {
- Address EltPtr = Builder.CreateStructGEP(Dest, i);
- llvm::Value *Elt = Builder.CreateExtractValue(Val, i);
- Builder.CreateStore(Elt, EltPtr, DestIsVolatile);
- }
- } else {
- Builder.CreateStore(Val, Dest, DestIsVolatile);
- }
-}
-
/// CreateCoercedStore - Create a store to \arg DstPtr from \arg Src,
/// where the source and destination may have different types. The
/// destination is known to be aligned to \arg DstAlign bytes.
///
/// This safely handles the case when the src type is larger than the
/// destination type; the upper bits of the src will be lost.
-static void CreateCoercedStore(llvm::Value *Src,
- Address Dst,
- bool DstIsVolatile,
- CodeGenFunction &CGF) {
- llvm::Type *SrcTy = Src->getType();
- llvm::Type *DstTy = Dst.getElementType();
- if (SrcTy == DstTy) {
- CGF.Builder.CreateStore(Src, Dst, DstIsVolatile);
- return;
- }
-
- llvm::TypeSize SrcSize = CGF.CGM.getDataLayout().getTypeAllocSize(SrcTy);
-
- if (llvm::StructType *DstSTy = dyn_cast<llvm::StructType>(DstTy)) {
- Dst = EnterStructPointerForCoercedAccess(Dst, DstSTy,
- SrcSize.getFixedValue(), CGF);
- DstTy = Dst.getElementType();
- }
-
- llvm::PointerType *SrcPtrTy = llvm::dyn_cast<llvm::PointerType>(SrcTy);
- llvm::PointerType *DstPtrTy = llvm::dyn_cast<llvm::PointerType>(DstTy);
- if (SrcPtrTy && DstPtrTy &&
- SrcPtrTy->getAddressSpace() != DstPtrTy->getAddressSpace()) {
- Src = CGF.Builder.CreateAddrSpaceCast(Src, DstTy);
- CGF.Builder.CreateStore(Src, Dst, DstIsVolatile);
+void CodeGenFunction::CreateCoercedStore(llvm::Value *Src, Address Dst,
+ llvm::TypeSize DstSize,
+ bool DstIsVolatile) {
+ if (!DstSize)
return;
- }
- // If the source and destination are integer or pointer types, just do an
- // extension or truncation to the desired type.
- if ((isa<llvm::IntegerType>(SrcTy) || isa<llvm::PointerType>(SrcTy)) &&
- (isa<llvm::IntegerType>(DstTy) || isa<llvm::PointerType>(DstTy))) {
- Src = CoerceIntOrPtrToIntOrPtr(Src, DstTy, CGF);
- CGF.Builder.CreateStore(Src, Dst, DstIsVolatile);
- return;
+ llvm::Type *SrcTy = Src->getType();
+ llvm::TypeSize SrcSize = CGM.getDataLayout().getTypeAllocSize(SrcTy);
+
+ // GEP into structs to try to make types match.
+ // FIXME: This isn't really that useful with opaque types, but it impacts a
+ // lot of regression tests.
+ if (SrcTy != Dst.getElementType()) {
+ if (llvm::StructType *DstSTy =
+ dyn_cast<llvm::StructType>(Dst.getElementType())) {
+ assert(!SrcSize.isScalable());
+ Dst = EnterStructPointerForCoercedAccess(Dst, DstSTy,
+ SrcSize.getFixedValue(), *this);
+ }
}
- llvm::TypeSize DstSize = CGF.CGM.getDataLayout().getTypeAllocSize(DstTy);
-
- // If store is legal, just bitcast the src pointer.
- if (isa<llvm::ScalableVectorType>(SrcTy) ||
- isa<llvm::ScalableVectorType>(DstTy) ||
- SrcSize.getFixedValue() <= DstSize.getFixedValue()) {
- Dst = Dst.withElementType(SrcTy);
- CGF.EmitAggregateStore(Src, Dst, DstIsVolatile);
+ if (SrcSize.isScalable() || SrcSize <= DstSize) {
+ if (SrcTy->isIntegerTy() && Dst.getElementType()->isPointerTy() &&
+ SrcSize == CGM.getDataLayout().getTypeAllocSize(Dst.getElementType()))
{
+ // If the value is supposed to be a pointer, convert it before storing
it.
+ Src = CoerceIntOrPtrToIntOrPtr(Src, Dst.getElementType(), *this);
----------------
zygoloid wrote:
Yeah, it definitely seems like it'd be a pretty big surprise to need this. OK.
https://github.com/llvm/llvm-project/pull/93115
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