Changes in directory llvm/include/llvm/Target:
TargetLowering.h updated: 1.117 -> 1.118
---
Log message:
add one addressing mode description hook to rule them all.
---
Diffs of the changes: (+21 -1)
TargetLowering.h | 22 +++++++++++++++++++++-
1 files changed, 21 insertions(+), 1 deletion(-)
Index: llvm/include/llvm/Target/TargetLowering.h
diff -u llvm/include/llvm/Target/TargetLowering.h:1.117
llvm/include/llvm/Target/TargetLowering.h:1.118
--- llvm/include/llvm/Target/TargetLowering.h:1.117 Tue Mar 27 20:51:02 2007
+++ llvm/include/llvm/Target/TargetLowering.h Fri Mar 30 18:14:50 2007
@@ -853,9 +853,29 @@
MachineBasicBlock *MBB);
//===--------------------------------------------------------------------===//
- // Loop Strength Reduction hooks
+ // Addressing mode description hooks (used by LSR etc).
//
+ /// AddrMode - This represents an addressing mode of:
+ /// BaseGV + BaseOffs + BaseReg + Scale*ScaleReg
+ /// If BaseGV is null, there is no BaseGV.
+ /// If BaseOffs is zero, there is no base offset.
+ /// If HasBaseReg is false, there is no base register.
+ /// If Scale is zero, there is no ScaleReg. Scale of 1 indicates a reg with
+ /// no scale.
+ ///
+ struct AddrMode {
+ GlobalValue *BaseGV;
+ int64_t BaseOffs;
+ bool HasBaseReg;
+ int64_t Scale;
+ };
+
+ /// isLegalAddressingMode - Return true if the addressing mode represented by
+ /// AM is legal for this target, for a load/store of the specified type.
+ /// TODO: Handle pre/postinc as well.
+ virtual bool isLegalAddressingMode(const AddrMode &AM, const Type *Ty) const;
+
/// isLegalAddressImmediate - Return true if the integer value can be used as
/// the offset of the target addressing mode for load / store of the given
/// type.
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