[llvm-commits] CVS: llvm/include/llvm/CodeGen/MachineConstantPool.h
Chris Lattner
lattner at cs.uiuc.edu
Wed Feb 8 20:44:44 PST 2006
Changes in directory llvm/include/llvm/CodeGen:
MachineConstantPool.h updated: 1.13 -> 1.14
---
Log message:
instead of keeping track of Constant/alignment pairs, actually compute the
offset of each entry from the start of the constant pool.
---
Diffs of the changes: (+15 -17)
MachineConstantPool.h | 32 +++++++++++++++-----------------
1 files changed, 15 insertions(+), 17 deletions(-)
Index: llvm/include/llvm/CodeGen/MachineConstantPool.h
diff -u llvm/include/llvm/CodeGen/MachineConstantPool.h:1.13 llvm/include/llvm/CodeGen/MachineConstantPool.h:1.14
--- llvm/include/llvm/CodeGen/MachineConstantPool.h:1.13 Wed Feb 8 22:21:49 2006
+++ llvm/include/llvm/CodeGen/MachineConstantPool.h Wed Feb 8 22:44:32 2006
@@ -24,42 +24,39 @@
#include <vector>
#include <iosfwd>
-#include <cassert>
namespace llvm {
class Constant;
+class TargetData;
/// MachineConstantPoolEntry - One entry in the constant pool.
///
struct MachineConstantPoolEntry {
/// Val - The constant itself.
Constant *Val;
- /// Alignment - The alignment of the constant.
- unsigned Alignment;
+ /// Offset - The offset of the constant from the start of the constant pool.
+ unsigned Offset;
- MachineConstantPoolEntry(Constant *V, unsigned A) : Val(V), Alignment(A) {}
+ MachineConstantPoolEntry(Constant *V, unsigned O) : Val(V), Offset(O) {}
};
class MachineConstantPool {
+ const TargetData &TD;
+ unsigned PoolAlignment;
std::vector<MachineConstantPoolEntry> Constants;
public:
+ MachineConstantPool(const TargetData &td) : TD(td), PoolAlignment(1) {}
+
+ /// getConstantPoolAlignment - Return the log2 of the alignment required by
+ /// the whole constant pool, of which the first element must be aligned.
+ unsigned getConstantPoolAlignment() const { return PoolAlignment; }
+
/// getConstantPoolIndex - Create a new entry in the constant pool or return
/// an existing one. User must specify an alignment in bytes for the object.
///
- unsigned getConstantPoolIndex(Constant *C, unsigned Alignment) {
- assert(Alignment && "Alignment must be specified!");
-
- // Check to see if we already have this constant.
- //
- // FIXME, this could be made much more efficient for large constant pools.
- for (unsigned i = 0, e = Constants.size(); i != e; ++i)
- if (Constants[i].Val == C && Constants[i].Alignment >= Alignment)
- return i;
- Constants.push_back(MachineConstantPoolEntry(C, Alignment));
- return Constants.size()-1;
- }
-
+ unsigned getConstantPoolIndex(Constant *C, unsigned Alignment);
+
/// isEmpty - Return true if this constant pool contains no constants.
///
bool isEmpty() const { return Constants.empty(); }
@@ -74,6 +71,7 @@
void print(std::ostream &OS) const;
/// dump - Call print(std::cerr) to be called from the debugger.
+ ///
void dump() const;
};
More information about the llvm-commits
mailing list