Implement bitfield read.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@46257 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/CodeGen/CodeGenFunction.h b/CodeGen/CodeGenFunction.h
index 55a02a8..d56e438 100644
--- a/CodeGen/CodeGenFunction.h
+++ b/CodeGen/CodeGenFunction.h
@@ -159,6 +159,11 @@
union {
llvm::Value *VectorIdx; // Index into a vector subscript: V[i]
unsigned VectorElts; // Encoded OCUVector element subset: V.xyx
+ struct {
+ unsigned short StartBit;
+ unsigned short Size;
+ bool IsSigned;
+ } BitfieldData; // BitField start bit and size
};
public:
bool isSimple() const { return LVType == Simple; }
@@ -177,8 +182,21 @@
assert(isOCUVectorElt());
return VectorElts;
}
-
-
+ // bitfield lvalue
+ llvm::Value *getBitfieldAddr() const { assert(isBitfield()); return V; }
+ unsigned short getBitfieldStartBit() const {
+ assert(isBitfield());
+ return BitfieldData.StartBit;
+ }
+ unsigned short getBitfieldSize() const {
+ assert(isBitfield());
+ return BitfieldData.Size;
+ }
+ bool isBitfieldSigned() const {
+ assert(isBitfield());
+ return BitfieldData.IsSigned;
+ }
+
static LValue MakeAddr(llvm::Value *V) {
LValue R;
R.LVType = Simple;
@@ -201,6 +219,17 @@
R.VectorElts = Elements;
return R;
}
+
+ static LValue MakeBitfield(llvm::Value *V, unsigned short StartBit,
+ unsigned short Size, bool IsSigned) {
+ LValue R;
+ R.LVType = BitField;
+ R.V = V;
+ R.BitfieldData.StartBit = StartBit;
+ R.BitfieldData.Size = Size;
+ R.BitfieldData.IsSigned = IsSigned;
+ return R;
+ }
};
/// CodeGenFunction - This class organizes the per-function state that is used
@@ -364,6 +393,7 @@
/// rvalue, returning the rvalue.
RValue EmitLoadOfLValue(LValue V, QualType LVType);
RValue EmitLoadOfOCUElementLValue(LValue V, QualType LVType);
+ RValue EmitLoadOfBitfieldLValue(LValue LV, QualType ExprType);
/// EmitStoreThroughLValue - Store the specified rvalue into the specified